List of nuclides

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This list of nuclides shows observed nuclides that either are stable or, if radioactive, have half-lives longer than one hour. At least 3,000 nuclides have been experimentally characterized. A selection of those with decay half-lives less than 60 minutes are shown.

A nuclide is defined conventionally as an experimentally examined bound collection of protons and neutrons that either is stable or has an observed decay mode.

Introduction[edit]

253 nuclides are considered stable. Many of these in theory could decay through spontaneous fission, alpha decay, double beta decay, etc. with a very long half-life, but no radioactive decay has yet been observed. Thus the number of stable nuclides is subject to change if some of these 253 are determined to be very long-lived radioactive nuclides in the future. If a decay has been predicted theoretically but never observed experimentally, it is given in parentheses. In theory, spontaneous fission is possible for all elements with atomic numbers >40,[citation needed] but has not been observed for most elements up to lead (82). The list lists nuclides unstable only to this fission mechanism, before nuclides theoretically unstable to additional mechanisms. Those that have been checked for radioactivity are indicated with "> number" and show the lower limit for the half-life based on experimental observation. Such nuclides are considered to be "stable" until a decay has been observed in some fashion. For example, tellurium-123 was reported to be radioactive, but the same experimental group later retracted this report, and it presently remains observationally stable.

The next group is the primordial radioactive nuclides. These have been measured to be radioactive, or decay products have been identified (Te-130, Ba-130). There are (currently) 33 of these, of which 29 have half-lives considerably longer than the age of the universe (13.8 billion years). With most of these 29, decay is difficult to observe and for most purposes they can be regarded as effectively stable. Bismuth-209 is notable as the only naturally occurring isotope of an element long considered stable. A further 4 nuclides, thorium-232, uranium-238, potassium-40 and uranium-235 have half lives between 14 billion and 700 million years, which means they have experienced measurable decay since the formation of the solar system about 4.6 billion years ago, but still exist on earth in significant quantities. They are the primary source of radiogenic heat and radioactive decay products. Together, there are a total of 286 primordial nuclides.[1]

The list then covers the ~700 radionuclides with half-lives longer than 1 hour, split into two tables, half lives greater than one day and less than one day. There are also more than 3000 radionuclides with half lives less than an hour, listed are those that exist naturally in decay chains

Over 60 nuclides that have half-lives too short to be primordial can be detected in nature as a result of later production by natural processes, mostly in trace amounts. These include ~44 radionuclides occurring in the decay chains of primordial uranium and thorium (radiogenic nuclides), such as radon-222. Others are the products of interactions with energetic cosmic-rays (e.g. cosmic ray spallation) (cosmogenic nuclides) such as carbon-14. This gives a total of about 350 naturally occurring nuclides. Other nuclides may be occasionally produced naturally but are difficult to detect by rare cosmogenic interactions or as a result of other natural nuclear reactions (nucleogenic nuclides).

Further shorter lived nuclides have been detected in the spectra of stars (e.g. technetium, promethium, californium). The remaining nuclides are known solely from artificial nuclear transmutation. Some, such as caesium-137, are found in the environment but as a result of contamination from man-made nuclear fission product releases (nuclear weapons, nuclear reactors, and other processes). Other are produced artificially for industrial or medical purposes.

List legend[edit]

All the radionuclides, starting with the longest-lived primordial radionuclides, are sorted by decreasing half-life, but the tables are sortable by other criteria.

no (number)

A running positive integer for reference. Especially for nuclides with short half-lives, this number, i.e. position in this table, might be changed in the future.

nuclide column

Nuclide identifiers are given by their atomic mass number A and the symbol for the corresponding chemical element (corresponding to the unique proton number). In the cases that this is not the ground state, this is indicated by a m for metastable appended to the mass number. Sorting here sorts by mass number.

Z, N column

The number of protons and number of neutrons.

energy column

The column labeled "energy" denotes the energy equivalent of the difference between the mass per nucleon of this nuclide and the mass of a neutron (so all nuclides get a positive value) in MeV, formally: mnmnuclide / A. Thus the mass of the nuclide (in Daltons) is A (mnE / k) where E is the energy, mn is 1.008664915 Da and k = 931.4941 the conversion factor between MeV and Daltons.

half-life column

The main column shows times in seconds (31,556,926 seconds = 1 year), a second column showing half life in more usual units (year, day) is also provided. Entries starting with a ">" indicates that no decay has ever been observed, with null experiments establishing lower limits for the half-life. Such elements are considered stable unless a decay can be observed (establishing an actual estimate for the half-life). Note half lives may be imprecise estimates and can be subject to significant revision.

decay mode column
α α decay
β β decay
ββ double β decay
ε electron capture
β+ β+ decay
β+β+ double β+ decay
SF spontaneous fission
IT isomeric transition

Decay modes in parentheses are still not observed through experiment but are, by their energy, predicted to occur. Numbers in brackets indicate probability of that decay mode occurring in %, tr indicate <0.1%. Spontaneous fission is not shown as a theoretical decay mode for stable nuclides where other modes are possible.

decay energy column

Multiple values for (maximal) decay energy are mapped to decay modes in their order. The decay energy listed is for the specific nuclide only, not for the whole decay chain. It includes the energy lost to neutrinos.

notes column

CG: Cosmogenic nuclide;

DP: Naturally occurring decay product (of thorium-232, uranium-238 and uranium-235;

FP: Fission product of Uranium-235 / Plutonium-239 (only those with a half life over one day are shown);

IM: Industry or medically used radionuclide.[2]

Full list[edit]

Stable nuclides[edit]

no nuclide A Z N energy half-life (s) decay mode decay energy (MeV)
1 56Fe 56 26 30 9.153567
2 62Ni 62 28 34 9.147877
3 60Ni 60 28 32 9.145862
4 58Fe 58 26 32 9.142938
5 52Cr 52 24 28 9.137037
6 57Fe 57 26 31 9.127119
7 59Co 59 27 32 9.126046
8 54Cr 54 24 30 9.125633
9 61Ni 61 28 33 9.124129
10 55Mn 55 25 30 9.120611
11 64Ni 64 28 36 9.119754
12 66Zn 66 30 36 9.115258
13 53Cr 53 24 29 9.114435
14 63Cu 63 29 34 9.112272
15 65Cu 65 29 36 9.106154
16 68Zn 68 30 38 9.100845
17 50Ti 50 22 28 9.099861
18 51V 51 23 28 9.094884
19 67Zn 67 30 37 9.084468
20 48Ti 48 22 26 9.081488
21 72Ge 72 32 40 9.079465
22 70Ge 70 32 38 9.079372
23 69Ga 69 31 38 9.076078
24 88Sr 88 38 50 9.070438
25 74Ge 74 32 42 9.063522
26 49Ti 49 22 27 9.062323
27 76Se 76 34 42 9.061485
28 71Ga 71 31 40 9.059218
29 78Se 78 34 44 9.058842
30 90Zr 90 40 50 9.057631
31 89Y 89 39 50 9.056743
32 86Sr 86 38 48 9.054160
33 82Kr 82 36 46 9.054126
34 84Kr 84 36 48 9.052649
35 73Ge 73 32 41 9.048006
36 87Sr 87 38 49 9.046964
37 75As 75 33 42 9.045093
38 80Kr 80 36 44 9.044984
39 77Se 77 34 43 9.040153
40 85Rb 85 37 48 9.037998
41 91Zr 91 40 51 9.037156
42 83Kr 83 36 47 9.034966
43 79Br 79 35 44 9.034220
44 81Br 81 35 46 9.033979
45 92Zr 92 40 52 9.032783
46 46Ti 46 22 24 9.030532
47 47Ti 47 22 25 9.027336
48 44Ca 44 20 24 9.013793
49 42Ca 42 20 22 8.989116
50 38Ar 38 18 20 8.984870
51 45Sc 45 21 24 8.983945
52 43Ca 43 20 23 8.964551
53 34S 34 16 18 8.951675
54 40Ar 40 18 22 8.947325
55 41K 41 19 22 8.938623
56 39K 39 19 20 8.938174
57 37Cl 37 17 20 8.929760
58 36S 36 16 20 8.923108
59 35Cl 35 17 18 8.900285
60 30Si 30 14 16 8.885761
61 32S 32 16 16 8.884318
62 33S 33 16 17 8.876964
63 31P 31 15 16 8.859744
64 28Si 28 14 14 8.838935
65 29Si 29 14 15 8.826327
66 27Al 27 13 14 8.708242
67 26Mg 26 12 14 8.694981
68 24Mg 24 12 12 8.651911
69 25Mg 25 12 13 8.599047
70 23Na 23 11 12 8.485675
71 22Ne 22 10 12 8.436087
72 20Ne 20 10 10 8.423422
73 16O 16 8 8 8.367390
74 21Ne 21 10 11 8.344280
75 19F 19 9 10 8.149612
76 17O 17 8 9 8.118904
77 18O 18 8 10 8.114744
78 12C 12 6 6 8.071327
79 15N 15 7 8 8.064594
80 14N 14 7 7 7.866827
81 13C 13 6 7 7.830943
82 4He 4 2 2 7.465077
83 11B 11 5 6 7.283337
84 10B 10 5 5 6.866257
85 9Be 9 4 5 6.810483
86 7Li 7 3 4 5.941599
87 6Li 6 3 3 5.723527
88 3He 3 2 1 3.094327
89 2H 2 1 1 1.503327
90 1H 1 1 0 0.782327
91 94Mo 94 42 52 9.011856 (SF) < 4.485
92 93Nb 93 41 52 9.009051 (SF) < 0.943
93 96Mo 96 42 54 8.996229 (SF) < 5.771
94 95Mo 95 42 53 8.994564 (SF) < 4.531
95 97Mo 97 42 55 8.973806 (SF) < 6.226
96 98Ru 98 44 54 8.971572 (SF) < 11.690
97 100Ru 100 44 56 8.963517 (SF) < 13.634
98 99Ru 99 44 55 8.956348 (SF) < 12.368
99 102Ru 102 44 58 8.944837 (SF) < 12.049
100 101Ru 101 44 57 8.942117 (SF) < 13.205
101 104Pd 104 46 58 8.930847 (SF) < 18.969
102 103Rh 103 45 58 8.925910 (SF) < 15.462
103 106Pd 106 46 60 8.919460 (SF) < 16.806
104 105Pd 105 46 59 8.913356 (SF) < 18.247
105 108Pd 108 46 62 8.900253 (SF) < 16.102
106 107Ag 107 47 60 8.897514 (SF) < 20.512
107 110Cd 110 48 62 8.892718 (SF) < 22.486
108 109Ag 109 47 62 8.885300 (SF) < 19.241
109 112Cd 112 48 64 8.880077 (SF) < 20.733
110 111Cd 111 48 63 8.875445 (SF) < 21.883
111 114Sn 114 50 64 8.865722 (SF) < 27.965
112 113In 113 49 64 8.862212 (SF) < 24.281
113 116Sn 116 50 66 8.860362 (SF) < 25.905
114 115Sn 115 50 65 8.854249 (SF) < 26.791
115 118Sn 118 50 68 8.848073 (SF) < 23.815
116 117Sn 117 50 67 8.843977 (SF) < 25.334
117 120Sn 120 50 70 8.830537 (SF) < 21.824
118 119Sn 119 50 69 8.828201 (SF) < 23.140
119 121Sb 121 51 70 8.811783 (SF) < 25.718
120 122Te 122 52 70 8.811606 (SF) < 30.974
121 124Te 124 52 72 8.801364 (SF) < 28.221
122 123Sb 123 51 72 8.796727 (SF) < 23.454
123 126Te 126 52 74 8.786126 (SF) < 26.011
124 125Te 125 52 73 8.783505 (SF) < 26.966
125 128Xe 128 54 74 8.773359 (SF) < 35.047
126 127I 127 53 74 8.771981 (SF) < 29.961
127 130Xe 130 54 76 8.762725 (SF) < 32.483
128 129Xe 129 54 75 8.758904 (SF) < 33.947
129 132Xe 132 54 78 8.747695 (SF) < 30.885
130 131Xe 131 54 77 8.746253 (SF) < 31.140
131 134Ba 134 56 78 8.735133 (SF) < 40.520
132 133Cs 133 55 78 8.733515 (SF) < 34.753
133 136Ba 136 56 80 8.724908 (SF) < 38.041
134 135Ba 135 56 79 8.722072 (SF) < 39.357
135 137Ba 137 56 81 8.711628 (SF) < 35.722
136 138Ba 138 56 82 8.710904 (SF) < 34.302
137 140Ce 140 58 82 8.700494 (SF) < 43.633
138 139La 139 57 82 8.698892 (SF) < 38.944
139 141Pr 141 59 82 8.681405 (SF) < 48.450
140 142Nd 142 60 82 8.676646 (SF) < 53.264
141 156Gd 156 64 92 8.536342 (SF) < 71.541
142 157Gd 157 64 93 8.522478 (SF) < 70.531
143 158Gd 158 64 94 8.518775 (SF) < 70.965
144 159Tb 159 65 94 8.508680 (SF) < 74.878
145 163Dy 163 66 97 8.478607 (SF) < 79.055
146 164Dy 164 66 98 8.473604 (SF) < 79.499
147 54Fe 54 26 28 9.113040 +β+) 0.680
148 58Ni 58 28 30 9.109736 +β+) 1.926
149 74Se 74 34 40 9.047175 +β+) 1.209
150 80Se 80 34 46 9.043326 β) 0.134
151 86Kr 86 36 50 9.039532 β) 1.256
152 84Sr 84 38 46 9.031375 +β+) 1.787
153 92Mo 92 42 50 9.014860 +β+) 1.649
154 94Zr 94 40 54 8.999698 β) 1.144
155 98Mo 98 42 56 8.970426 β) 0.112
156 96Ru 96 44 52 8.967911 +β+) 2.719
157 102Pd 102 46 56 8.933337 +β+) 1.172
158 104Ru 104 44 60 8.918337 β) 1.300
159 36Ar 36 18 18 8.911105 +β+) 0.433
160 110Pd 110 46 64 8.874500 β) 2.000
161 112Sn 112 50 62 8.862944 +β+) 1.922
162 122Sn 122 50 72 8.808590 β) 0.366
163 124Sn 124 50 74 8.782914 β) 2.287
164 126Xe 126 54 72 8.779010 +β+) 0.897
165 143Nd 143 60 83 8.658792 (α) 0.521
166 144Sm 144 62 82 8.640577 +β+, α) 1.781, 0.076
167 145Nd 145 60 85 8.632963 (α) 1.578
168 146Nd 146 60 86 8.625649 β, α) 0.070, 1.182
169 148Nd 148 60 88 8.594388 β, α) 1.929, 0.599
170 150Sm 150 62 88 8.585043 (α) 1.449
171 152Sm 152 62 90 8.563227 (α) 0.220
172 153Eu 153 63 90 8.550893 (α) 0.274
173 154Gd 154 64 90 8.549985 (α) 0.081
174 154Sm 154 62 92 8.541857 β) 1.251
175 155Gd 155 64 91 8.536341 (α) 0.081
176 156Dy 156 66 90 8.523443 +β+, α) 2.011, 1.758
177 158Dy 158 66 92 8.516973 +β+, α) 0.283, 0.875
178 160Dy 160 66 94 8.506816 (α) 0.439
179 161Dy 161 66 95 8.494067 (α) 0.344
180 162Dy 162 66 96 8.492234 (α) 0.085
181 162Er 162 68 94 8.480852 +β+, α) 1.844, 1.646
182 164Er 164 68 96 8.473462 +β+, α) 0.024, 1.304
183 165Ho 165 67 98 8.464689 (α) 0.139
184 166Er 166 68 98 8.462482 (α) 0.831
185 167Er 167 68 99 8.450350 (α) 0.666
186 168Er 168 68 100 8.446308 (α) 0.553
187 168Yb 168 70 98 8.437845 +β+, α) 1.422, 1.951
188 169Tm 169 69 100 8.433931 (α) 1.200
189 170Yb 170 70 100 8.428792 (α) 1.738
190 170Er 170 68 102 8.424945 β, α) 0.654, 0.050
191 171Yb 171 70 101 8.418182 (α) 1.559
192 172Yb 172 70 102 8.415864 (α) 1.310
193 173Yb 173 70 103 8.404023 (α) 0.946
194 174Yb 174 70 104 8.398624 (α) 0.740
195 175Lu 175 71 104 8.386589 (α) 1.620
196 176Hf 176 72 104 8.381427 (α) 2.255
197 177Hf 177 72 105 8.370139 (α) 2.245
198 178Hf 178 72 106 8.365958 (α) 2.083
199 179Hf 179 72 107 8.353293 (α) 1.806
200 180Hf 180 72 108 8.347930 (α) 1.283
201 181Ta 181 73 108 8.338961 (α) 1.526
202 185Re 185 75 110 8.308204 (α) 2.195
203 187Os 187 76 111 8.291746 (α) 2.720
204 188Os 188 76 112 8.290138 (α) 2.143
205 189Os 189 76 113 8.277599 (α) 1.976
206 190Os 190 76 114 8.275045 (α) 1.378
207 191Ir 191 77 114 8.263508 (α) 2.084
208 192Pt 192 78 114 8.260353 (α) 2.418
209 192Os 192 76 116 8.258202 β, α) 0.413, 0.362
210 194Pt 194 78 116 8.250519 (α) 1.504
211 193Ir 193 77 116 8.250259 (α) 1.017
212 195Pt 195 78 117 8.239516 (α) 1.158
213 196Pt 196 78 118 8.237896 (α) 0.794
214 196Hg 196 80 116 8.233710 +β+, α) 0.820, 2.027
215 197Au 197 79 118 8.229404 (α) 0.954
216 198Hg 198 80 118 8.227663 (α) 1.383
217 198Pt 198 78 120 8.222378 β, α) 1.047, 0.087
218 199Hg 199 80 119 8.219805 (α) 0.824
219 200Hg 200 80 120 8.218848 (α) 0.718
220 201Hg 201 80 121 8.208956 (α) 0.334
221 202Hg 202 80 122 8.206703 (α) 0.136
222 203Tl 203 81 122 8.198230 (α) 0.911
223 204Hg 204 80 124 8.192358 β) 0.416
224 205Tl 205 81 124 8.187526 (α) 0.157
225 206Pb 206 82 124 8.186791 (α) 1.137
226 207Pb 207 82 125 8.179791 (α) 0.391
227 208Pb 208 82 126 8.175888 (α) 0.519
 228 134Xe 134 54 80 8.728973 > 1.83×1030 β) 0.825
 229 40Ca 40 20 20 8.942485 > 9.47×1028 +β+) 0.194
 230 132Ba 132 56 76 8.741288 > 9.47×1028 +β+) 0.846
 231 160Gd 160 64 96 8.496009 > 9.78×1026 β) 1.729
 232 184W 184 74 110 8.319737 > 9.15×1026 (α) 1.656
 233 186W 186 74 112 8.299873 > 8.52×1026 (α) 1.123
 234 183W 183 74 109 8.324699 > 4.10×1026 (α) 1.680
 235 182W 182 74 108 8.336424 > 2.62×1026 (α) 1.772
 236 114Cd 114 48 66 8.860985 > 2.02×1026 β) 0.540
 237 50Cr 50 24 26 9.076517 > 4.10×1025 +β+) 1.167
 238 108Cd 108 48 60 8.897735 > 3.16×1025 +β+) 0.272
 239 142Ce 142 58 84 8.666666 > 8.20×1024 β, α) 1.417, 1.298
 240 106Cd 106 48 58 8.893327 > 8.20×1024 +β+) 2.770
 241 176Yb 176 70 106 8.375271 > 5.05×1024 β, α) 1.083, 0.570
 242 204Pb 204 82 122 8.194414 > 4.42×1024 (α) 1.972
 243 124Xe 124 54 70 8.778264 > 3.47×1024 +β+) 2.864
 244 123Te 123 52 71 8.796302 > 2.90×1024 +) 0.052
 245 64Zn 64 30 34 9.102634 > 8.84×1023 +β+) 1.096
 246 120Te 120 52 68 8.816369 > 6.94×1023 +β+) 1.700
 247 70Zn 70 30 40 9.065109 > 4.10×1023 β) 0.998
 248 46Ca 46 20 26 9.009047 > 8.84×1022 β) 0.988
 249 149Sm 149 62 87 8.589058 > 6.31×1022 (α) 1.870
 250 180mTa 180 73 107 8.342767 > 3.79×1022 , ε, α) 0.783, 0.929, 2.103
 251 138Ce 138 58 80 8.705878 > 2.84×1021 +β+) 0.694
 252 136Ce 136 58 78 8.707122 > 2.21×1021 +β+) 2.419
 253 184Os 184 76 108 8.311850 > 1.77×1021 (α, β+β+) 2.963, 1.451

Primordial radioactive nuclides[edit]

no nuclide Z N energy half-life (s) half-life (years) decay mode decay energy (MeV)
254 128Te 52 76 8.743261 6.94×1031 2.2×1024 ββ 2.530
255 78Kr 36 42 9.022349 2.90×1029 9.2×1021 εε 2.846
256 136Xe 54 82 8.706805 7.5×1028 2.38×1021 ββ 2.462
257 76Ge 32 44 9.034656 5.642×1028 1.8×1021 ββ 2.039
258 130Ba 56 74 8.742574 3.79×1028 1.2×1021 εε 2.620
259 82Se 34 48 9.017596 3.408×1027 1.1×1020 ββ 2.995
260 116Cd 48 68 8.836146 9.783×1026 3.1×1019 ββ 2.809
261 48Ca 20 28 8.992452 7.258×1026 2.3×1019 ββ, β 4.274, 0.0058
262 96Zr 40 56 8.961359 6.3×1026 2.0×1019 ββ 3.348
263 209Bi 83 126 8.158689 5.996×1026 1.9×1019 α 3.137
264 130Te 52 78 8.766578 2.777×1026 8.8×1018 ββ 0.868
265 150Nd 60 90 8.562594 2.493×1026 7.9×1018 ββ 3.367
266 100Mo 42 58 8.933167 2.461×1026 7.8×1018 ββ 3.035
267 151Eu 63 88 8.565759 1.578×1026 5.0×1018 α 1.964
268 180W 74 106 8.347127 5.680×1025 1.8×1018 α 2.509
269 50V 23 27 9.055759 4.418×1024 1.4×1017 β+, β 2.205, 1.038
270 113Cd 48 65 8.859372 2.430×1023 7.7×1015 β 0.321
271 148Sm 62 86 8.607423 2.209×1023 7.0×1015 α 1.986
272 144Nd 60 84 8.652947 7.227×1022 2.29×1015 α 1.905
273 186Os 76 110 8.302508 6.312×1022 2.0×1015 α 2.823
274 174Hf 72 102 8.392287 6.312×1022 2.0×1015 α 2.497
275 115In 49 66 8.849910 1.392×1022 4.4×1014 β 0.499
276 152Gd 64 88 8.562868 3.408×1021 1.1×1014 α 2.203
277 190Pt 78 112 8.267764 2.051×1019 6.5×1011 α 3.252
278 147Sm 62 85 8.610593 3.345×1018 1.06×1011 α 2.310
279 138La 57 81 8.698320 3.219×1018 1.02×1011 ε, β 1.737, 1.044
280 87Rb 37 50 9.043718 1.568×1018 4.97×1010 β 0.283
281 187Re 75 112 8.291732 1.300×1018 4.12×1010 β, α 0.0026, 1.653
282 176Lu 71 105 8.374665 1.187×1018 3.764×1010 β 1.193
283 232Th 90 142 7.918533 4.434×1017 1.406×1010 α, SF 4.083
284 238U 92 146 7.872551 1.410×1017 4.471×109 α, SF, ββ 4.270
285 40K 19 21 8.909707 3.938×1016 1.25×109 β, ε, β+ 1.311, 1.505, 1.505
286 235U 92 143 7.897198 2.222×1016 7.04×108 α, SF 4.679

Radionuclides with a half life of 1 day to 100 million years[edit]

no nuclide Z N energy half-life (s) half-life decay mode notes
287 244Pu 94 150 7.826221 2.525×1015 8.0×107 y α, SF
288 146Sm 62 84 8.626136 2.144×1015 6.8×107 y α
289 92Nb 41 51 9.010980 1.095×1015 3.47×107 y β+, β CG
290 236U 92 144 7.891470 7.391×1014 2.34×107 y α, SF
291 205Pb 82 123 8.187279 5.459×1014 1.73×107 y β+ CG
292 129I 53 76 8.757397 4.955×1014 1.57×107 y β CG, FP
293 247Cm 96 151 7.806008 4.923×1014 1.56×107 y α
294 182Hf 72 110 8.324399 2.809×1014 8.90×106 y β
295 107Pd 46 61 8.897197 2.051×1014 6.50×106 y β FP
296 98Tc 43 55 8.953246 1.325×1014 4.20×106 y β
297 53Mn 25 28 9.103175 1.180×1014 3.74×106 y β+ CG
298 154Dy 66 88 8.528457 9.467×1013 3.00×106 y α
299 60Fe 26 34 9.094861 8.268×1013 2.62×106 y β
300 97Tc 43 54 8.970503 8.203×1013 2.60×106 y β+
301 210mBi 83 127 8.140473 9.594×1013 2.58×106 y α
302 135Cs 55 80 8.720082 7.258×1013 2.30×106 y β FP
303 237Np 93 144 7.881989 6.766×1013 2.14×106 y α, SF DP
304 150Gd 64 86 8.576454 5.649×1013 1.79×106 y α
305 93Zr 40 53 9.008069 4.828×1013 1.53×106 y β FP
306 10Be 4 6 6.810657 4.765×1013 1.51×106 y β CG
307 26Al 13 13 8.540954 2.263×1013 717000 y β+ CG
308 242Pu 94 148 7.845218 1.183×1013 375000 y α, SF
309 208Bi 83 125 8.162049 1.161×1013 368000 y β+
310 248Cm 96 152 7.799586 1.098×1013 348000 y α, SF
311 36Cl 17 19 8.891380 9.499×1012 301000 y β, β+ CG, IM
312 79Se 34 45 9.032310 9.309×1012 295000 y β FP
313 234U 92 142 7.908308 7.747×1012 245500 y α, SF DP
314 126Sn 50 76 8.754026 7.258×1012 223000 y β FP
315 81Kr 36 45 9.030513 7.227×1012 229000 y β+ CG
316 99Tc 43 56 8.953379 6.662×1012 211100 y β FP, DP
317 186mRe 75 111 8.295958 6.312×1012 200000 y IT
318 233U 92 141 7.912873 5.024×1012 159200 y α, SF DP
319 236Np 93 143 7.887514 4.860×1012 154000 y β+, β, α
320 41Ca 20 21 8.928347 3.219×1012 102000 y β+ CG
321 59Ni 28 31 9.107863 2.398×1012 76000 y β+
322 230Th 90 140 7.937136 2.379×1012 75400 y α, SF DP
323 137La 57 80 8.707101 1.893×1012 60000 y β+
324 202Pb 82 120 8.199714 1.657×1012 52500 y β+, α
325 231Pa 91 140 7.926627 1.034×1012 32770 y α, SF DP
326 239Pu 94 145 7.868022 7.609×1011 24110 y α, SF IM, DP
327 94Nb 41 53 8.990099 6.406×1011 20300 y β CG
328 245Cm 96 149 7.822329 2.682×1011 8500 y α, SF
329 250Cm 96 154 7.779371 2.619×1011 8300 y SF, α, β
330 243Am 95 148 7.836035 2.326×1011 7371 y α, SF
331 229Th 90 139 7.942127 2.316×1011 7339 y α DP
332 240Pu 94 146 7.862465 2.070×1011 6560 y α, SF
333 14C 6 8 7.855620 1.799×1011[3] 5701 y[3] β CG, IM
334 246Cm 96 150 7.816781 1.502×1011 4760 y α, SF
335 163Ho 67 96 8.478591 1.442×1011 4570 y β+
336 93Mo 42 51 9.004693 1.262×1011 4000 y β+
337 226Ra 88 138 7.966597 5.049×1010 1600 y α DP
338 247Bk 97 150 7.806182 4.355×1010 1380 y α
339 166mHo 67 99 8.451273 3.787×1010 1200 y β
340 251Cf 98 153 7.775969 2.834×1010 898 y α, SF
341 91Nb 41 50 9.023327 2.146×1010 680 y β+
342 194Hg 80 114 8.237271 1.401×1010 444 y β+
343 108mAg 47 61 8.881439 1.382×1010 437.9 y β+, IT
344 241Am 95 146 7.851676 1.364×1010 432.2 y α, SF IM
345 249Cf 98 151 7.791305 1.108×1010 351.1 y α, SF
346 39Ar 18 21 8.923686 8.489×109 269 y β CG
347 192mIr 77 115 8.251875 7.605×109 241 y IT
348 158Tb 65 93 8.511055 5.680×109 180 y β+, β
349 242mAm 95 147 7.841913 4.450×109 141 y IT, α, SF
350 32Si 14 18 8.823856 4.166×109 132 y β CG
351 209Po 84 125 8.149633 3.951×109 [4]125.2 y α, β+
352 63Ni 28 35 9.111210 3.159×109 101 y β IM
353 151Sm 62 89 8.565251 2.840×109 90.0 y β FP
354 238Pu 94 144 7.877358 2.768×109 87.7 y α, SF IM, DP
355 157Tb 65 92 8.522096 2.241×109 71.0 y β+
356 148Gd 64 84 8.586706 2.237×109 70.9 y α
357 232U 92 140 7.922143 2.174×109 68.9 y α, SF
358 44Ti 22 22 8.924702 1.893×109 59.1 y β+
359 193Pt 78 115 8.249965 1.578×109 50.0 y β+
360 121mSn 50 71 8.808499 1.385×109 43.89 y IT, β
361 150Eu 63 87 8.569974 1.164×109 36.89 y β+
362 42Ar 18 24 8.890923 1.038×109 32.9 y β
363 207Bi 83 124 8.168209 1.038×109 31.6 y β+
364 178m2Hf 72 106 9.776×108 31 y IT
365 137Cs 55 82 8.703047 9.477×108 30.1 y β FP, IM
366 243Cm 96 147 7.836004 9.183×108 29.1 y α, β+, SF
367 90Sr 38 52 9.026239 9.120×108 28.9 y β FP, IM
368 210Pb 82 128 8.141462 7.006×108 22.2 y β, α DP, IM
369 227Ac 89 138 7.957447 6.871×108 21.77 y β, α DP
370 244Cm 96 148 7.831763 5.712×108 18.1 y α, SF
371 145Pm 61 84 8.631838 5.586×108 17.7 y β+, α
372 93mNb 41 52 5.084×108 16.1 y IT
373 241Pu 94 147 7.851590 4.510×108 14.3 y β, α, SF
374 113mCd 48 65 4.380×108 13.9 y β, IT FP
375 152Eu 63 89 8.550897 4.262×108 13.51 y β+, β
376 250Cf 98 152 7.786640 4.128×108 13.08 y α, SF
377 3H 1 2 3.087994 3.888×108 12.32 y β CG, IM
378 85Kr 36 49 9.029919 3.384×108 10.72 y β FP, IM
379 133Ba 56 77 8.729624 3.319×108 10.52 y β+
380 248Bk 97 151 7.796811 > 2.840×108 9.00 y α
381 154Eu 63 91 8.537200 2.711×108 8.60 y β, β+
382 194Os 76 118 8.238508 1.893×108 6.0 y β
383 228Ra 88 140 7.944390 1.815×108 5.75 y β DP
384 146Pm 61 85 8.615574 1.745×108 5.53 y β+, β
385 60Co 27 33 9.098811 1.663×108 5.27 y β IM
386 155Eu 63 92 8.534711 1.500×108 4.75 y β FP
387 204Tl 81 123 8.190671 1.193×108 3.78 y β, β+ IM
388 174Lu 71 103 8.390726 1.045×108 3.31 y β+
389 101Rh 45 56 8.936753 1.041×108 3.3 y β+
390 102mRh 45 57 8.920680 9.152×107 2.9 y β+, IT
391 208Po 84 124 8.155315 9.145×107 2.898 y α, β+
392 236Pu 94 142 7.889536 9.019×107 2.858 y α, SF
393 125Sb 51 74 8.777367 8.705×107 2.759 y β FP
394 55Fe 26 29 9.116407 8.637×107 2.737 y β+
395 252Cf 98 154 7.769605 8.347×107 2.645 y α, SF IM
396 147Pm 61 86 8.609068 8.279×107 2.624 y β FP, DP
397 22Na 11 11 8.306891 8.213×107 2.603 y β+ CG
398 134Cs 55 79 8.719768 6.517×107 2.065 y β, β+ FP
399 171Tm 69 102 8.417620 6.059×107 1.92 y β
400 228Th 90 138 7.953906 6.033×107 1.912 y α DP
401 172Hf 72 100 8.399252 5.901×107 1.87 y β+
402 179Ta 73 106 8.352703 5.743×107 1.82 y β+
403 173Lu 71 102 8.400147 4.323×107 1.37 y β+
404 252Es 99 153 7.764621 4.075×107 1.291 y α, β+, β
405 109Cd 48 61 8.883327 3.986×107 1.263 y β+
406 235Np 93 142 7.896669 3.422×107 1.084 y β+, α
407 106Ru 44 62 8.885686 3.228×107 1.023 y β FP
408 144Pm 61 83 8.636751 3.136×107 363 d β+
409 145Sm 62 83 8.627590 2.938×107 340 d β+
410 248Cf 98 150 7.800198 2.881×107 333.4 d α, SF
411 249Bk 97 152 7.790805 2.851×107 330 d β, α, SF
412 49V 23 26 9.050040 2.843×107 329.1 d β+
413 54Mn 25 29 9.100131 2.697×107 312.2 d β+, β IM
414 119m1Sn 50 69 2.534×107 293.1 d IT
415 144Ce 58 86 8.629918 2.462×107 285 d β FP
416 254Es 99 155 7.748524 2.382×107 275.7 d α, β, SF, β+
417 57Co 27 30 9.112454 2.348×107 271.8 d β+ IM
418 68Ge 32 36 9.056327 2.341×107 271 d β+ IM
419 143Pm 61 82 8.651509 2.290×107 265 d β+
420 110mAg 47 63 8.865355 2.158×107 249.8 d β, IT
421 65Zn 30 35 9.085352 2.105×107 243.6 d β+ IM
422 153Gd 64 89 8.547731 2.077×107 240.4 d β+ IM
423 102Rh 45 57 1.788×107 207 d β+, β
424 195Au 79 116 8.238353 1.608×107 186.1 d β+
425 194mIr 77 117 8.238025 1.477×107 170.9 d β
426 184mRe 75 109 8.310670 1.460×107 169 d IT, β+
427 242Cm 96 146 7.844860 1.407×107 162.8 d α, SF
428 45Ca 20 25 8.978261 1.405×107 162.6 d β
429 177mLu 71 106 8.361829 1.386×107 160.4 d β, IT
430 121mTe 52 69 8.800749 1.331×107 154.1 d IT, β+
431 159Dy 66 93 8.506378 1.248×107 144.4 d β+
432 174m1Lu 71 103 1.227×107 142 d IT, EC
433 210Po 84 126 8.147295 1.196×107 138.4 d α DP
434 139Ce 58 81 8.696881 1.189×107 137.6 d β+
435 123Sn 50 73 8.785311 1.116×107 129.2 d β
436 170Tm 69 101 8.423096 1.111×107 128.6 d β, β+
437 151Gd 64 87 8.562685 1.071×107 124 d β+, α
438 181W 74 107 8.337924 1.047×107 121.2 d β+
439 75Se 34 41 9.033581 1.035×107 119.8 d β+ IM
440 123mTe 52 71 1.03×107 119.2 d IT
441 113Sn 50 63 8.853035 9.944×106 115.1 d β+
442 182Ta 73 109 8.326456 9.887×106 114.4 d β
443 127mTe 52 75 8.765759 9.418×106 109 d IT
444 88Y 39 49 9.029272 9.212×106 106.6 d β+
445 257Fm 100 157 7.726619 8.683×106 100.5 d α, SF
446 185Os 76 109 8.302730 8.087×106 93.6 d β+
447 168Tm 69 99 8.436316 8.044×106 93.1 d β+, β
448 149Eu 63 86 8.584395 8.044×106 93.1 d β+
449 97mTc 43 54 7.862×106 91 d IT
450 35S 16 19 8.895510 7.561×106 87.51 d β CG
451 83Rb 37 46 9.024038 7.448×106 86.2 d β+
452 46Sc 21 25 8.979091 7.239×106 83.78 d β
453 88Zr 40 48 9.021589 7.206×106 83.4 d β+
454 73As 33 40 9.043341 6.938×106 80.3 d β+
455 56Co 27 29 9.072031 6.673×106 77.23 d β+
456 185W 74 111 8.305866 6.489×106 75.1 d β
457 192Ir 77 115 6.379×106 73.827 d β IM
458 160Tb 65 95 8.495346 6.247×106 72.3 d β
459 58Co 27 31 9.103153 6.122×106 70.86 d β+
460 183Re 75 108 8.321661 6.048×106 70 d β+
461 175Hf 72 103 8.382665 6.048×106 70 d β+
462 188W 74 114 8.277003 6.029×106 69.78 d β
463 85Sr 38 47 9.025480 5.602×106 64.84 d β+
464 95Zr 40 55 8.972989 5.532×106 64.03 d β FP
465 95mTc 43 52 8.976359 5.270×106 61 d β+, IT
466 91mNb 41 50 5.258×106 60.86 d IT,ε
467 254Cf 98 156 7.751087 5.227×106 60.5 d SF, α
468 124Sb 51 73 8.777943 5.194×106 60.12 d β
469 125I 53 72 8.782019 5.132×106 59.4 d β+ IM
470 91Y 39 52 9.020174 5.055×106 58.51 d β FP
471 125mTe 52 73 4.959×106 57.4 d IT
472 148Eu 63 85 8.586882 4.709×106 54.5 d β+, α
473 7Be 4 3 5.818470 4.598×106 53.22 d β+ CG
474 258Md 101 157 7.715948 4.450×106 51.5 d α, SF
475 89Sr 38 51 9.039969 4.369×106 50.57 d β FP, IM
476 114mIn 49 65 8.846608 4.278×106 49.51 d IT, β+
477 146Gd 64 82 8.592512 4.171×106 48.28 d β+
478 203Hg 80 123 8.195806 4.026×106 46.6 d β
479 237Pu 94 143 7.881060 3.905×106 45.2 d β+, α
480 115mCd 48 67 8.835754 3.850×106 44.56 d β
481 59Fe 26 33 9.099516 3.844×106 44.49 d β IM
482 181Hf 72 109 8.333272 3.662×106 42.38 d β
483 148mPm 61 87 8.589800 3.567×106 41.28 d β, IT
484 105Ag 47 58 8.900547 3.567×106 41.28 d β+
485 255Es 99 156 7.741567 3.439×106 39.8 d β, α, SF
486 103Ru 44 59 8.918500 3.392×106 39.26 d β FP
487 127Xe 54 73 8.766768 3.145×106 36.4 d β+
488 184Re 75 109 3.059×106 35.4 d β+
489 95Nb 41 54 8.984821 3.023×106 34.99 d β FP
490 37Ar 18 19 8.907752 3.020×106 34.95 d β+ CG
491 129mTe 52 77 8.744953 2.903×106 33.6 d IT, β
492 84Rb 37 47 9.020732 2.860×106 33.1 d β+, β
493 241Cm 96 145 7.848492 2.834×106 32.8 d β+, α
494 141Ce 58 83 8.677286 2.809×106 32.51 d β FP
495 169Yb 70 99 8.428546 2.767×106 32.03 d β+ IM
496 260Md 101 159 7.699789 2.748×106 31.81 d SF, α, β+, β
497 51Cr 24 27 9.080127 2.393×106 27.7 d β+ IM
498 240Cm 96 144 7.855805 2.333×106 27 d α, β+, SF
499 233Pa 91 142 7.910426 2.331×106 26.98 d β
500 82Sr 38 44 8.998254 2.208×106 25.56 d β+ IM
501 33P 15 18 8.869434 2.189×106 25.34 d β
502 179m2Hf 72 107 2.164×106 25.05 d IT
503 234Th 90 144 7.897763 2.082×106 24.1 d β DP
504 147Eu 63 84 8.598879 2.082×106 24.1 d β+, α
505 178W 74 104 8.354563 1.866×106 21.6 d β+
506 230U 92 138 7.933871 1.797×106 20.8 d α, SF
507 253Es 99 154 7.759019 1.769×106 20.5 d α, SF
508 121Te 52 69 1.656×106 19.2 d ε
509 227Th 90 137 7.957644 1.614×106 18.7 d α DP
510 86Rb 37 49 9.033502 1.611×106 18.6 d β, β+
511 253Cf 98 155 7.757885 1.539×106 17.8 d β, α
512 74As 33 41 9.028895 1.535×106 17.8 d β+, β
513 230Pa 91 139 7.931436 1.503×106 17.4 d β+, β, α
514 103Pd 46 57 8.920638 1.468×106 17.0 d β+ IM
515 99Rh 45 54 8.935711 1.391×106 16.1 d β+
516 48V 23 25 8.997890 1.380×106 15.97 d β+
517 191Os 76 115 8.261870 1.331×106 15.41 d β
518 205Bi 83 122 8.174069 1.323×106 15.31 d β+
519 156Eu 63 93 8.520642 1.312×106 15.19 d β
520 225Ra 88 137 7.973576 1.287×106 14.9 d β
521 32P 15 17 8.830865 1.232×106 14.26 d β CG, IM
522 117mSn 50 67 1.21×106 14 d IT
523 143Pr 59 84 8.652258 1.172×106 13.56 d β
524 189Ir 77 112 8.274783 1.140×106 13.19 d β+
525 136Cs 55 81 8.706171 1.127×106 13.04 d β
526 126I 53 73 8.769026 1.117×106 12.93 d β+, β
527 140Ba 56 84 8.666120 1.102×106 12.75 d β FP
528 126Sb 51 75 8.757042 1.067×106 12.35 d β
529 202Tl 81 121 8.199956 1.057×106 12.23 d β+
530 131mXe 54 77 1.023×106 11.84 d IT
531 190Ir 77 113 8.264755 1.018×106 11.78 d β+
532 131Ba 56 75 8.733037 9.936×105 11.5 d β+
533 223Ra 88 135 7.994042 9.876×105 11.43 d α DP, IM
534 71Ge 32 39 9.055943 9.876×105 11.43 d β+
535 147Nd 60 87 8.602973 9.487×105 10.98 d β
536 246Pu 94 152 7.805494 9.366×105 10.84 d β
537 193mIr 77 116 9.098×105 10.53 d IT
538 188Pt 78 110 8.272514 8.813×105 10.2 d β+, α
539 92mNb 41 51 8.770×105 10.15 d β+, α
540 225Ac 89 136 7.975159 8.571×105 9.92 d α DP
541 131Cs 55 76 8.743541 8.371×105 9.69 d β+ IM
542 125Sn 50 75 8.758515 8.329×105 9.64 d β
543 169Er 68 101 8.431852 8.115×105 9.39 d β IM
544 149Gd 64 85 8.575576 8.018×105 9.28 d β+, α
545 167Tm 69 98 8.445866 7.992×105 9.25 d β+
546 129mXe 54 75 7.672×105 8.88 d IT
547 206Po 84 122 8.159590 7.603×105 8.80 d β+, α
548 72Se 34 38 9.014300 7.258×105 8.40 d β+
549 106mAg 47 59 8.890639 7.154×105 8.28 d β+
550 171Lu 71 100 8.409532 7.119×105 8.24 d β+
551 131I 53 78 8.738842 6.930×105 8.02 d β FP, IM
552 257Es 99 158 7.723468 6.653×105 7.7 d β, SF
553 111Ag 47 64 8.866111 6.437×105 7.45 d β
554 161Tb 65 96 8.490383 5.967×105 6.91 d β
555 237U 92 145 7.879800 5.832×105 6.75 d β
556 172Lu 71 101 8.401217 5.789×105 6.70 d β+ IM
557 177Lu 71 106 5.743×105 6.65 d β
558 132Cs 55 77 8.731599 5.599×105 6.48 d β+, β
559 206Bi 83 123 8.168551 5.394×105 6.24 d β+
560 196Au 79 117 8.230205 5.328×105 5.17 d β+, β
561 56Ni 28 28 9.033899 5.249×105 6.08 d β+
562 118Te 52 66 8.814726 5.184×105 6 d β+
563 145Eu 63 82 8.609245 5.124×105 5.93 d β+
564 120mSb 51 69 8.808194 4.977×105 5.76 d β+
565 52Mn 25 27 9.046431 4.831×105 5.59 d β+
566 148Pm 61 87 4.638×105 5.37 d β
567 156Tb 65 91 8.520667 4.622×105 5.35 d β+
568 155Tb 65 90 8.531031 4.596×105 5.32 d β+
569 133Xe 54 79 8.730302 4.530×105 5.24 d β IM
570 183Ta 73 110 8.318847 4.406×105 5.10 d β
571 210Bi 83 127 4.330×105 5.01 d β, α DP
572 245Bk 97 148 7.819020 4.268×105 4.94 d β+, α
573 119mTe 52 67 8.801773 4.061×105 4.7 d β+, IT
574 146Eu 63 83 8.599560 3.983×105 4.61 d β+
575 47Ca 20 27 8.972181 3.919×105 4.54 d β
576 234Np 93 141 7.900571 3.802×105 4.4 d β+
577 101mRh 45 56 3.74×105 4.34 d ε, IT
578 193mPt 78 115 3.74×105 4.33 d IT
579 96Tc 43 53 8.965255 3.698×105 4.28 d β+
580 231U 92 139 7.924977 3.629×105 4.2 d β+, α
581 175Yb 70 105 8.383902 3.616×105 4.19 d β
582 124I 53 71 8.775884 3.608×105 4.18 d β+ IM
583 195mPt 78 117 3.46×105 4.01 d IT
584 127Sb 51 76 8.754005 3.326×105 3.85 d β
585 222Rn 86 136 7.997573 3.304×105 3.82 d α DP
586 186Re 75 111 3.21×105 3.72 d β−,e IM
587 224Ra 88 136 7.987277 3.138×105 3.63 d α DP
588 100Pd 46 54 8.923587 3.136×105 3.63 d β+
589 95mNb 41 54 3.11×105 3.61 d IT, β−
590 166Dy 66 100 8.448376 2.938×105 3.4 d β
591 140Nd 60 80 8.673113 2.912×105 3.37 d β+
592 47Sc 21 26 9.014564 2.894×105 3.35 d β
593 87Y 39 48 9.025565 2.873×105 3.33 d β+
594 89Zr 40 49 9.024912 2.823×105 3.27 d β+
595 67Ga 31 36 9.069532 2.819×105 3.26 d β+ IM
596 132Te 52 80 8.716646 2.768×105 3.2 d β FP
597 134Ce 58 76 8.704432 2.730×105 3.16 d β+
598 199Au 79 120 8.217534 2.712×105 3.14 d β
599 201Tl 81 120 8.206561 2.625×105 3.04 d β+ IM
600 253Fm 100 153 7.757691 2.592×105 3. d β+, α
601 191Pt 78 113 8.258228 2.473×105 2.86 d β+
602 111In 49 62 8.867688 2.423×105 2.8 d β+ IM
603 97Ru 44 53 8.959080 2.411×105 2.79 d β+
604 99Mo 42 57 8.939669 2.375×105 2.75 d β FP, IM
605 122Sb 51 71 8.795346 2.353×105 2.72 d β, β+
606 71As 33 38 9.027581 2.350×105 2.72 d β+
607 198Au 79 119 8.220732 2.329×105 2.7 d β IM
608 197Hg 80 117 8.226358 2.309×105 2.67 d β+
609 90Y 39 51 9.032294 2.306×105 2.67 d β IM
610 182Re 75 107 8.321053 2.304×105 2.67 d β+
611 172Tm 69 103 8.404932 2.290×105 2.65 d β
612 67Cu 29 38 9.076086 2.226×105 2.58 d β IM
613 44mSc 21 23 8.924627 2.110×105 2.44 d IT, β+
614 128Ba 56 72 8.738523 2.100×105 2.43 d β+
615 77Br 35 42 9.022431 2.053×105 2.38 d β+
616 166Yb 70 96 8.442340 2.041×105 2.36 d β+
617 177Ta 73 104 8.363553 2.036×105 2.36 d β+
618 239Np 93 146 7.864999 2.036×105 2.36 d β DP
619 153Tb 65 88 8.537471 2.022×105 2.34 d β+
620 66Ni 28 38 9.071423 1.966×105 2.28 d β
621 247Pu 94 153 7.791975 1.961×105 2.27 d β
622 198m2Au 79 119 1.96×105 2.27 d IT
623 115Cd 48 67 1.92×105 2.23 d β−
624 149Pm 61 88 8.581871 1.911×105 2.21 d β
625 133mXe 54 79 1.89×105 2.20 d IT
626 203Pb 82 121 8.193431 1.869×105 2.16 d β+
627 238Np 93 145 7.871931 1.829×105 2.12 d β
628 240Am 95 145 7.856694 1.829×105 2.12 d β+, α
629 172Er 68 104 8.399752 1.775×105 2.05 d β
630 170Lu 71 99 8.408445 1.738×105 2.01 d β+
631 72Zn 30 42 9.017591 1.674×105 1.94 d β
632 153Sm 62 91 8.545614 1.666×105 1.93 d β IM
633 202Pt 78 124 8.183209 1.584×105 1.83 d β
634 48Sc 21 27 8.998327 1.572×105 1.82 d β
635 246Bk 97 149 7.811287 1.555×105 1.8 d β+, α
636 195mHg 80 115 8.229399 1.498×105 1.73 d IT, β+
637 188Ir 77 111 8.275200 1.494×105 1.73 d β+
638 140La 57 83 8.673620 1.450×105 1.68 d β
639 254mEs 99 155 1.41×105 1.64 d β−, IT, α, EC, SF
640 69Ge 32 37 9.043800 1.406×105 1.63 d β+
641 133mBa 56 77 1.4×105 1.62 d IT,e
642 77As 33 44 9.031283 1.398×105 1.62 d β
643 119Sb 51 68 8.823235 1.375×105 1.59 d β+
644 147Gd 64 83 8.584001 1.370×105 1.59 d β+
645 194Au 79 115 8.237626 1.369×105 1.58 d β+
646 229Pa 91 138 7.940769 1.296×105 1.5 d β+, α
647 246Cf 98 148 7.810792 1.285×105 1.49 d α, β+, SF
648 57Ni 28 29 9.055222 1.282×105 1.48 d β+
649 105Rh 45 60 8.907956 1.273×105 1.47 d β FP
650 82Br 35 47 9.016407 1.270×105 1.47 d β
651 79Kr 36 43 9.013644 1.261×105 1.46 d β+
652 137mCe 58 79 8.696327 1.238×105 1.43 d IT, β+
653 169Lu 71 98 8.414978 1.226×105 1.42 d β+
654 143Ce 58 85 8.642041 1.189×105 1.38 d β
655 251Es 99 152 7.774467 1.188×105 1.38 d β+, α
656 83Sr 38 45 8.996568 1.167×105 1.35 d β+
657 129Cs 55 74 8.749622 1.154×105 1.34 d β+
658 268Db 105 163 7.635133 1.152×105 1.33 d SF, EC
659 232Pa 91 141 7.916379 1.132×105 1.31 d β, β+
660 193Os 76 117 8.244348 1.084×105 1.25 d β
661 165Tm 69 96 8.452758 1.082×105 1.25 d β+
662 131mTe 52 79 8.720392 1.080×105 1.25 d β, IT
663 226Ac 89 137 7.963761 1.057×105 1.22 d β, β+, α
664 160Er 68 92 8.484190 1.029×105 1.19 d β+
665 151Pm 61 90 8.557387 1.022×105 1.18 d β
666 135mBa 56 79 1.01×105 1.17 d IT
667 121Sn 50 71 9.73×104 1.13 d β−
668 166Ho 67 99 9.65×104 1.12 d β− IM
669 76As 33 43 9.022505 9.454×104 1.09 d β
670 200Tl 81 119 8.206567 9.396×104 1.09 d β+
671 72As 33 39 9.018966 9.360×104 1.08 d β+
672 231Th 90 141 7.924932 9.187×104 1.06 d β, α DP
673 252Fm 100 152 7.766498 9.140×104 1.06 d α, SF
674 252Cm 96 156 7.757439 8.99×104 [5]1.04 d β
675 156mTb 65 91 8.78×104 1.02 d IT
676 189Re 75 114 8.272269 8.748×104 1.01 d β

Radionuclides with half-lives of 1 hour to 24 hours[edit]

no nuclide Z N energy half-life (s) half-life (h) decay mode notes
677 197mHg 80 117 8.568×104 23.8 IT
678 187W 74 113 8.284722 8.539×104 23.7 β
679 248mBk 97 151 8.532×104 23.7 β, EC (30)
680 173Hf 72 101 8.391617 8.496×104 23.6 β+
681 96Nb 41 55 8.963036 8.406×104 23.4 β
682 154m2Tb 65 89 8.526912 8.172×104 22.7 β+, IT (1.8)
683 236mNp 93 143 8.1×104 22.5 EC, β (50)
684 43K 19 24 8.922327 8.028×104 22.3 β
685 182Os 76 106 8.316432 7.956×104 22.1 β+
686 228Pa 91 137 7.944468 7.920×104 22.0 β+, α (2)
687 48Cr 24 24 8.963390 7.762×104 21.6 β+
688 154Tb 65 89 7.74×104 21.5 β+, β (<0.1)
689 200Pb 82 118 8.202542 7.740×104 21.5 β+
690 112Pd 46 66 8.842185 7.571×104 21.0 β
691 28Mg 12 16 8.607706 7.529×104 20.9 β CG
692 100Rh 45 55 8.927167 7.488×104 20.8 β+
693 133I 53 80 8.717094 7.488×104 20.8 β
694 122Xe 54 68 8.770959 7.236×104 20.1 β+
695 255Fm 100 155 7.742704 7.225×104 20.1 α, SF (tr)
696 95Tc 43 52 7.2×104 20.0 β+
697 181Re 75 106 8.328294 7.164×104 19.9 β+
698 197Pt 78 119 8.225756 7.161×104 19.9 β
699 135La 57 78 8.713179 7.020×104 19.5 β+
700 194Ir 77 117 6.941×104 19.3 β
701 142Pr 59 83 8.661417 6.883×104 19.1 β,EC (tr)
702 200mAu 79 121 8.202877 6.732×104 18.7 β, IT (18)
703 159Gd 64 95 8.502576 6.652×104 18.5 β
704 135Ce 58 77 8.698179 6.372×104 17.7 β+
705 193Au 79 114 8.244353 6.354×104 17.7 β+
706 151Tb 65 86 8.545692 6.339×104 17.6 β+, α (tr)
707 55Co 27 28 9.053647 6.311×104 17.5 β+
708 152Tb 65 87 8.536591 6.300×104 17.5 β+, α (tr)
709 188Re 75 113 8.278860 6.121×104 17.0 β IM
710 125Xe 54 71 8.768864 6.084×104 16.9 β+
711 97Zr 40 57 8.926451 6.028×104 16.7 β
712 186Ir 77 109 8.281935 5.990×104 16.6 β+
713 86Zr 40 46 8.975979 5.940×104 16.5 β+
714 76Br 35 41 8.996183 5.832×104 16.2 β+
715 119Te 52 67 5.778×104 16.1 EC, e+ (2.1)
716 242Am 95 147 5.767×104 16.0 β, EC (17)
717 170Hf 72 98 8.402210 5.764×104 16.0 β+
718 157Eu 63 94 8.513792 5.465×104 15.2 β
719 24Na 11 13 8.422082 5.382×104 15.0 β CG, IM
720 76Kr 36 40 8.979406 5.328×104 14.8 β+
721 86Y 39 47 8.993234 5.306×104 14.7 β+
722 211Rn 86 125 8.112825 5.256×104 14.6 β+, α (27)
723 90Nb 41 49 8.989727 5.256×104 14.6 β+
724 185Ir 77 108 8.289382 5.184×104 14.4 β+
725 240U 92 148 7.851682 5.076×104 14.1 β
726 72Ga 31 41 9.023958 5.074×104 14.1 β
727 69mZn 30 39 9.056536 4.954×104 13.8 IT, β (tr)
728 109Pd 46 63 8.875061 4.932×104 13.7 β
729 87mY 39 48 4.813×104 13.4 IT, β+ (1.6)
730 123I 53 70 8.786311 4.760×104 13.2 β+ IM
731 191mOs 76 115 4.716×104 13.1 IT
732 183Os 76 107 8.309907 4.680×104 13.0 β+
733 150mEu 63 87 4.608×104 12.8 β, β+(11)
734 64Cu 29 35 9.093581 4.572×104 12.7 β+, β (38) IM
735 182mRe 75 107 4.572×104 12.7 β+
736 200Pt 78 122 8.204342 4.500×104 12.5 β
737 130I 53 77 8.740035 4.450×104 12.4 β
738 42K 19 23 8.905175 4.436×104 12.3 β IM
739 171Hf 72 99 8.395480 4.356×104 12.1 β+
740 239Am 95 144 7.864666 4.284×104 11.9 β+, α (0.01)
741 193mHg 80 113 8.231483 4.248×104 11.8 β+, IT (7.2)
742 203Bi 83 120 8.177436 4.234×104 11.8 β+
743 77Ge 32 45 8.996185 4.068×104 11.3 β
744 204Bi 83 121 8.172651 4.039×104 11.2 β+
745 189Pt 78 111 8.264359 3.913×104 10.9 β+
746 212Pb 82 130 8.106928 3.830×104 10.6 β DP, IM
747 195Hg 80 115 3.791×104 10.5 β+
748 175Ta 73 102 8.370813 3.780×104 10.5 β+
749 245Pu 94 151 7.813752 3.780×104 10.5 β
750 187Ir 77 110 8.283713 3.780×104 10.5 β+
751 165Er 68 97 8.462406 3.730×104 10.4 β+
752 93Y 39 54 8.976951 3.665×104 10.2 β
753 244Am 95 149 7.825914 3.636×104 10.1 β
754 266Lr 103 163 3.600×104 10.0 SF
755 154m1Tb 65 89 3.598×104 9.99 β+, IT(22)
756 183mOs 76 107 3.564×104 9.90 β+, IT(15)
757 155Dy 66 89 8.517521 3.564×104 9.90 β+
758 91Sr 38 53 8.990503 3.467×104 9.63 β
759 196m2Au 79 117 3.456×104 9.60 IT
760 66Ga 31 35 9.036843 3.416×104 9.49 β+
761 156Sm 62 94 8.516007 3.384×104 9.40 β
762 127Te 52 75 3.366×104 9.35 β
763 201Pb 82 119 8.196989 3.359×104 9.33 β+
764 152mEu 63 89 3.352×104 9.31 β, β+(28)
765 62Zn 30 32 9.057957 3.307×104 9.19 β+
766 135Xe 54 81 8.711453 3.290×104 9.14 β
767 58mCo 27 31 3.276×104 9.10 IT
768 128Sb 51 77 8.732343 3.244×104 9.01 β
769 137Ce 58 79 3.24×104 9.00 β+
770 234Pu 94 140 7.898892 3.168×104 8.80 β+, α (~6)
771 184Ta 73 111 8.304154 3.132×104 8.70 β
772 250Es 99 151 7.778407 3.096×104 8.60 β+, α (<3)
773 101Pd 46 55 8.917149 3.049×104 8.47 β+
774 52Fe 26 26 9.000789 2.979×104 8.28 β+
775 173Tm 69 104 8.396524 2.966×104 8.24 β
776 180Ta 73 107 2.935×104 8.15 EC, β (14)
777 157Dy 66 91 8.513544 2.930×104 8.14 β+
778 210At 85 125 8.128337 2.916×104 8.10 β+, α (0.2)
779 176Ta 73 103 8.363202 2.912×104 8.09 β+
780 166Tm 69 97 8.444183 2.772×104 7.70 β+
781 256mEs 99 157 7.730742 2.736×104 7.60 β
782 171Er 68 103 8.408901 2.706×104 7.52 β
783 199Tl 81 118 8.212333 2.671×104 7.42 β+
784 211At 85 126 8.126527 2.597×104 7.21 β+, α (42)
785 73Se 34 39 9.005821 2.574×104 7.15 β+
786 93mMo 42 51 2.466×104 6.85 IT, β+ (0.1)
787 234Pa 91 143 7.898930 2.412×104 6.70 β DP
788 135I 53 82 8.691994 2.365×104 6.57 β
789 107Cd 48 59 8.884271 2.340×104 6.50 β+
790 82mRb 37 45 8.999608 2.330×104 6.47 β+, IT (<0.3)
791 153Dy 66 87 8.523288 2.304×104 6.40 β+, α (tr)
792 127Cs 55 72 8.750383 2.250×104 6.25 β+
793 228Ac 89 139 7.944591 2.214×104 6.15 β DP
794 99mTc 43 56 2.162×104 6.01 IT, β (tr) IM
795 145Pr 59 86 8.620514 2.154×104 5.98 β
796 189mOs 76 113 2.092×104 5.81 IT
797 207Po 84 123 8.154158 2.088×104 5.80 β+, α (0.02)
798 90Mo 42 48 8.962072 2.002×104 5.56 β+
799 257Md 101 156 7.725040 1.987×104 5.52 EC, α (15), SF (tr)
800 111mPd 46 65 8.844589 1.980×104 5.50 IT, β (27)
801 139mNd 60 79 8.659529 1.980×104 5.50 β+, IT (12)
802 180mHf 72 108 1.969×104 5.47 IT, β (0.3)
803 209At 85 124 8.132954 1.948×104 5.41 β+, α (4.1)
804 113Ag 47 66 8.841531 1.933×104 5.37 β
805 156m2Tb 65 91 1.908×104 5.30 IT (?), β+ (?)
806 198Tl 81 117 8.210166 1.908×104 5.30 β+
807 251Fm 100 151 7.768590 1.908×104 5.30 β+, α (1.8)
808 138Nd 60 78 8.665661 1.814×104 5.04 β+
809 160mHo 67 93 8.485877 1.807×104 5.02 IT, β+ (27)
810 118mSb 51 67 8.814963 1.800×104 5.00 β+
811 243Pu 94 149 7.833648 1.784×104 4.96 β
812 192Au 79 113 8.242036 1.778×104 4.94 β+
813 110In 49 61 8.857464 1.764×104 4.90 β+
814 133mCe 58 75 8.690771 1.764×104 4.90 β+
815 94Tc 43 51 8.966583 1.758×104 4.88 β+
816 85mY 39 46 8.986880 1.750×104 4.86 β+, IT (tr)
817 73Ga 31 42 9.026112 1.750×104 4.86 β
818 192Hg 80 112 8.238051 1.746×104 4.85 β+
819 132La 57 75 8.705721 1.728×104 4.80 β+
820 99mRh 45 54 1.692×104 4.70 β+, IT (<0.16)
821 267Db 105 162 7.644361 1.656×104 4.60 SF
822 179Lu 71 108 8.345428 1.652×104 4.59 β
823 81Rb 37 44 9.002871 1.645×104 4.57 β+ IM
824 243Bk 97 146 7.829801 1.620×104 4.50 β+, α (~0.15)
825 115mIn 49 66 1.615×104 4.49 IT, β (5.0)
826 85mKr 36 49 1.613×104 4.48 β, IT (21)
827 105Ru 44 61 8.889689 1.598×104 4.44 β
828 80mBr 35 45 9.018872 1.591×104 4.42 IT
829 139Pr 59 80 8.681565 1.588×104 4.41 β+
830 129Sb 51 78 8.727358 1.584×104 4.40 β
831 244Bk 97 147 7.822491 1.566×104 4.35 β+, α (tr)
832 109In 49 60 8.864805 1.512×104 4.20 β+
833 184Hf 72 112 8.296871 1.483×104 4.12 β
834 149Tb 65 84 8.551166 1.482×104 4.12 β+, α (17)
835 110Sn 50 60 8.851727 1.480×104 4.11 β+
836 44Sc 21 23 1.429×104 3.97 β+
837 71mZn 30 41 9.017370 1.426×104 3.96 β, IT (tr)
838 141La 57 84 8.659540 1.411×104 3.92 β
839 133La 57 76 8.714109 1.408×104 3.91 β+
840 43Sc 21 22 8.912907 1.401×104 3.89 β+
841 195mIr 77 118 8.233326 1.368×104 3.80 β, IT (5)
842 193Hg 80 113 1.368×104 3.80 β+
843 176mLu 71 105 1.319×104 3.66 β, EC (0.1)
844 262Lr 103 159 7.681556 1.296×104 3.60 SF, β+, α
845 202mPb 82 120 1.274×104 3.54 IT, β+ (9.5)
846 92Y 39 53 8.993208 1.274×104 3.54 β
847 204Po 84 120 8.161200 1.271×104 3.53 β+, α (0.7)
848 132Ce 58 74 8.696131 1.264×104 3.51 β+
849 150Tb 65 85 8.545394 1.253×104 3.48 β+, α (tr)
850 117mCd 48 69 8.808840 1.210×104 3.36 β
851 61Cu 29 32 9.087452 1.200×104 3.33 β+
852 209Pb 82 127 8.155607 1.171×104 3.25 β
853 254Fm 100 154 7.752808 1.166×104 3.24 α, SF (0.06)
854 250Bk 97 153 7.779523 1.156×104 3.21 β
855 161Er 68 93 8.476352 1.156×104 3.21 β+
856 190mRe 75 115 8.257433 1.152×104 3.20 β (54), IT
857 90mY 39 51 1.148×104 3.19 IT, β (tr)
858 191Au 79 112 8.248343 1.145×104 3.18 β+
859 173Ta 73 100 8.374218 1.130×104 3.14 β+
860 112Ag 47 65 8.844756 1.127×104 3.13 β
861 247Cf 98 149 7.803566 1.120×104 3.11 β+, α (0.04)
862 184Ir 77 107 8.286599 1.112×104 3.09 β+
863 190m3Ir 77 113 1.111×104 3.09 β+, IT (8.6)
864 45Ti 22 23 8.938121 1.109×104 3.08 β+
865 167Ho 67 100 8.444304 1.081×104 3.00 β
866 134Sm 62 72 1.048×104 2.91 IT
867 239Cm 96 143 7.857143 1.044×104 2.90 β+, α (tr)
868 197Tl 81 116 8.215190 1.022×104 2.84 β+
869 88Kr 36 52 8.976918 1.022×104 2.84 β
870 38S 16 22 8.778196 1.022×104 2.84 β
871 87mSr 38 49 1.013×104 2.82 IT, EC (0.3)
872 117Sb 51 66 8.828977 1.008×104 2.80 β+
873 224Ac 89 135 7.980993 1.001×104 2.78 β+, α (9.4), β(<1.6)
874 93Tc 43 50 8.970274 9.900×103 2.75 β+
875 85Y 39 46 9.648×103 2.68 β+
876 150Pm 61 89 8.562014 9.648×103 2.68 β
877 92Sr 38 54 8.972067 9.576×103 2.66 β
878 256Fm 100 156 7.737398 9.456×103 2.63 SF, α (8.1)
879 31Si 14 17 8.811618 9.438×103 2.62 β CG
880 56Mn 25 31 9.087572 9.284×103 2.58 β
881 65Ni 28 37 9.073267 9.062×103 2.52 β
882 195Ir 77 118 9×103 2.50 β
883 176W 74 102 8.359055 9.000×103 2.50 β+
884 117Cd 48 69 8.964×103 2.49 β
885 116Te 52 64 8.806414 8.964×103 2.49 β+
886 141Nd 60 81 8.668476 8.964×103 2.49 β+
887 161Ho 67 94 8.488737 8.928×103 2.48 β+
888 210Rn 86 124 8.117032 8.640×103 2.40 α (96), β+
889 198Pb 82 116 8.202893 8.640×103 2.40 β+
890 238Cm 96 142 7.863764 8.640×103 2.40 β+, α
891 83Br 35 48 9.023243 8.640×103 2.40 β
892 152Dy 66 86 8.532670 8.568×103 2.38 β+, α (0.1) IM
893 178mTa 73 105 8.355075 8.496×103 2.36 β+
894 187Pt 78 109 8.267638 8.460×103 2.35 β+
895 165Dy 66 99 8.456891 8.402×103 2.33 β
896 267Rf 104 163 7.647357 8.280×103 2.30 SF
897 132I 53 79 8.720570 8.262×103 2.30 β
898 158Er 68 90 8.484619 8.244×103 2.29 β+
899 66Ge 32 34 9.004964 8.136×103 2.26 β+
900 129Ba 56 73 8.730746 8.028×103 2.23 β+
901 150Sm 62 88 7.992×103 2.22 β+, α (tr?)
902 177W 74 103 8.352118 7.920×103 2.20 β+
903 106mRh 45 61 8.884761 7.860×103 2.18 β
904 129mBa 56 73 7.776×103 2.16 β+, IT (tr?)
905 138mPr 59 79 8.671088 7.632×103 2.12 β+
906 121I 53 68 8.784443 7.632×103 2.12 β+
907 127Sn 50 77 8.728800 7.560×103 2.10 β
908 123Xe 54 69 8.764409 7.488×103 2.08 β+
909 186Pt 78 108 8.274897 7.488×103 2.08 β+, α (tr)
910 245Am 95 150 7.818674 7.380×103 2.05 β
911 89Nb 41 48 8.977507 7.308×103 2.03 β+
912 195mOs 76 119 7.2×103 2.00 β, IT (?)
913 117mIn 49 68 8.828849 6.972×103 1.94 β, IT (47)
914 186mIr 77 109 6.912×103 1.92 β+, IT (~25)
915 177Yb 70 107 8.359401 6.880×103 1.91 β
916 198mTl 81 117 6.732×103 1.87 β+, IT (44)
917 196Tl 81 115 8.211618 6.624×103 1.84 β+
918 83m2Kr 36 47 6.588×103 1.83 IT
919 18F 9 9 8.022789 6.585×103 1.83 β+ CG,IM
920 41Ar 18 23 8.877852 6.577×103 1.83 β CG
921 163Tm 69 94 8.456205 6.516×103 1.81 β+
922 239Pa 91 148 7.848148 6.480×103 1.80 β
923 201Bi 83 118 8.177875 6.480×103 1.80 β+, α
924 207At 85 122 8.135303 6.480×103 1.80 β+, α (~10)
925 224Rn 86 138 7.971327 6.420×103 1.78 β
926 80Sr 38 42 8.950177 6.378×103 1.77 β+
927 181Os 76 105 8.311935 6.300×103 1.75 β+
928 205Po 84 121 8.156737 6.264×103 1.74 β+, α (0.04)
929 149Nd 60 89 8.570529 6.221×103 1.73 β
930 202Bi 83 119 8.173966 6.192×103 1.72 β+, α (tr)
931 249Es 99 150 7.785464 6.132×103 1.70 β+~, α (0.6)
932 147Tb 65 82 8.552634 6.120×103 1.70 β+
933 87Zr 40 47 8.983373 6.048×103 1.68 β+
934 126Ba 56 70 8.727439 6.000×103 1.67 β+
935 113mIn 49 64 5.968×103 1.66 IT
936 61Co 27 34 9.102449 5.940×103 1.65 β
937 95Ru 44 51 8.949749 5.915×103 1.64 β+
938 238Am 95 143 7.867882 5.880×103 1.63 β+(tr)
939 208At 85 123 8.131376 5.868×103 1.63 β+, α (0.6)
940 133Ce 58 75 5.82×103 1.62 β+
941 75Br 35 40 8.993181 5.802×103 1.61 β+
942 152m5Eu 63 89 5.76×103 1.60 IT
943 259Md 101 158 7.709860 5.760×103 1.60 SF, α (<1.3)
944 197mPt 78 119 5.725×103 1.59 IT, β (3.3)
945 230Ra 88 142 7.921249 5.580×103 1.55 β
946 142La 57 85 8.634954 5.466×103 1.52 β
947 78As 33 45 9.004879 5.442×103 1.51 β
948 199Pb 82 117 8.198111 5.400×103 1.50 β+
949 78Ge 32 46 8.992635 5.280×103 1.47 β
950 255Cf 98 157 7.738739 5.100×103 1.42 β
951 196mTl 81 115 5.076×103 1.41 β+, IT (3.8)
952 196mIr 77 119 8.219440 5.040×103 1.40 β, IT (<0.3)
953 132mI 53 79 4.993×103 1.39 IT, β (14)
954 139Ba 56 83 8.682217 4.984×103 1.38 β
955 75Ge 32 43 9.029413 4.967×103 1.38 β
956 120I 53 67 8.769577 4.896×103 1.36 β+
957 266Db 105 161 4.8×103 1.33 α ?, SF ?, β+ ?
958 256Md 101 155 7.729062 4.620×103 1.28 β+, α (9.2), SF (<3)
959 137Pr 59 78 8.678459 4.608×103 1.28 β+
960 87Kr 36 51 8.999022 4.578×103 1.27 β
961 164Yb 70 94 8.443419 4.548×103 1.26 β+
962 163Er 68 95 8.471168 4.500×103 1.25 β+
963 77Kr 36 41 8.982618 4.464×103 1.24 β+
964 178Yb 70 108 8.350530 4.440×103 1.23 β
965 237Am 95 142 7.874830 4.380×103 1.22 β+(0.03)
966 142Sm 62 80 8.627616 4.349×103 1.21 β+
967 97Nb 41 56 8.953864 4.326×103 1.20 β
968 185Pt 78 107 8.269598 4.254×103 1.18 β+
969 195Tl 81 114 8.215712 4.176×103 1.16 β+
970 129Te 52 77 4.176×103 1.16 β
971 104Ag 47 57 8.889702 4.152×103 1.15 β+
972 110mIn 49 61 4.146×103 1.15 β+
973 174Ta 73 101 8.368684 4.104×103 1.14 β+
974 68Ga 31 37 9.057888 4.063×103 1.13 β+ IM
975 85mSr 38 47 4.058×103 1.13 IT, β+ (13)
976 190mIr 77 113 4.032×103 1.12 IT
977 162mHo 67 95 8.478371 4.020×103 1.12 IT, β+ (38)
978 204m2Pb 82 122 4.016×103 1.12 IT
979 89mNb 41 48 3.96×103 1.10 β+
980 103Ag 47 56 8.894541 3.942×103 1.10 β+
981 249Cm 96 153 7.787191 3.849×103 1.07 β
982 183Hf 72 111 8.307885 3.841×103 1.07 β
983 229Ac 89 140 7.937048 3.762×103 1.05 β
984 117Te 52 65 8.798652 3.720×103 1.03 β+
985 240Np 93 147 7.853348 3.714×103 1.03 β
986 182mHf 72 110 3.69×103 1.03 β, IT (46)
987 212Bi 83 129 8.109617 3.633×103 1.01 β(36) DP
988 116mSb 51 65 8.816483 3.618×103 1.01 β+
989 148Tb 65 83 8.547949 3.600×103 1.00 β+

Naturally occurring isotopes with half-lives below one hour[edit]

nuclide half-life decay mode
211Pb 36.1 min β
214Pb 26.8 min β
223Fr 22 min β, α
214Bi 19.9 min β, α
206Hg 8.15 min β
215Bi 7.6 min β
221Fr 4.8 min α
207Tl 4.77 min β
206Tl 4.2 min β
218Po 3.10 min α, β
208Tl 3.053 min β
211Bi 2.14 min α, β
210Tl 1.3 min β
234mPa 1.17 min β, I
219At 56 s α, β
220Rn 55.6 s α
285Cn 29 s α
219Rn 3.96 s α
218At 1.5 s α, β
211Po 0.516 s α
216Po 0.145 s α
218Rn 35 ms α
215Po 1.781 ms α
214Po 164.3 µs α
215At 0.1 ms α
212Po 299 ns α

See also[edit]

Sources[edit]

Almost all data are taken from reference.[6] For more recent updates, see reference.[7] These sources do not indicate whether certain heavy isotopes starting from Lr, Rf, Db... (etc.) were produced, observed, or only predicted from estimated data.

References[edit]

  1. ^ Two further nuclides, plutonium-244 and samarium-146, have half-lives just long enough (80 and 68 million years) that they could have survived from the formation of the solar system and be present on earth in trace quantities (having survived 57 and 67 half lives). They have previously been considered primordial, but recent studies failed to find any evidence of them on Earth.
  2. ^ primarily sourced fro http://world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-medicine.aspx and http://world-nuclear.org/information-library/non-power-nuclear-applications/radioisotopes-research/radioisotopes-in-industry.aspx accessed 30 June 2016
  3. ^ a b Other sources give the half-life of 14C as 5730 years (=1.808×1011 seconds)
  4. ^ Boutin, Chad. "Polonium's Most Stable Isotope Gets Revised Half-Life Measurement". nist.gov. NIST Tech Beat. Retrieved 9 September 2014. 
  5. ^ half life poorly determined, main authorities (NUDAT 2.6, NUBASE 2012) merely state <2 days. Figure is from http://periodictable.com/Isotopes/096.252/index2.html accessed 1 July 2016
  6. ^ Jagdish K. Tuli, Nuclear Wallet Cards, 7th edition, April 2005, Brookhaven National Laboratory, US National Nuclear Data Center
  7. ^ Interactive Chart of Nuclides (Brookhaven National Laboratory)

External links[edit]