List of nuclides

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This list of nuclides shows the >900 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 one or more protons and zero or more neutrons, that either is stable or has an observed decay mode.

Introduction[edit]

254 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 254 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) 34 of these, of which 28 have half-lives considerably longer than the age of the universe (13.8 billion years). With most of these 28, decay is difficult to observe and for most purposes they can be regarded as effectively stable. Bismuth-209 is notable as the only natural 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. The final two, plutonium-244 and samarium-146 have half-lives just long enough (80 and 68 million years) to survive from the formation of the solar system and be present on earth in trace quantities (having survived 57 and 67 half lives). Together, there are a total of 288 primordial nuclides.

The list then covers the ~700 radionuclides with half-lives longer than 1 hour. 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 (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.

Summary table for numbers of each class of nuclides[edit]

This is a summary table[1] of decay class for the ~986 nuclides with half-lives longer than one hour, given in this list of nuclides. Numbers may change slightly in the future, as nuclides radioactive only in theory are observed to be radioactive, half-life measurements improve, or new isotopes are discovered.

Stability class Number of
nuclides
Running
total
Naturally
Occurring
Nuclear
Isomers
Stable nuclides 254 254 254 1
Radioactive
Primordial radionuclides
Half-life > 50m years.
34 288 34 0
Half-life 1 to 50m years. 119 407 ~19 10
Half-life: 1 day to 1 year. ~269 ~676 ~11 ~40
Half-life: 1 hour to 1 day. ~310 ~986 ~9 ~66
Half-life < 1 hour. >3000 >4000 ~29 ~2000

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 mass number A and the symbol for the corresponding chemical element (implies a 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.

A, Z, N

The mass number, number of protons and number of neutrons is provided.

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,days) 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. 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]


List of Nuclides[edit]

Stable nuclides[edit]

no nuclide A Z N energy half-life 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+) 0.6800
148 58Ni 58 28 30 9.109736 +β+) 1.9258
149 74Se 74 34 40 9.047175 +β+) 1.2094
150 80Se 80 34 46 9.043326 β) 0.1339
151 86Kr 86 36 50 9.039532 β) 1.2556
152 84Sr 84 38 46 9.031375 +β+) 1.7867
153 92Mo 92 42 50 9.014860 +β+) 1.6491
154 94Zr 94 40 54 8.999698 β) 1.1440
155 98Mo 98 42 56 8.970426 β) 0.1125
156 96Ru 96 44 52 8.967911 +β+) 2.7188
157 102Pd 102 46 56 8.933337 +β+) 1.1720
158 104Ru 104 44 60 8.918337 β) 1.2997
159 36Ar 36 18 18 8.911105 +β+) 0.4335
160 110Pd 110 46 64 8.874500 β) 1.9997
161 112Sn 112 50 62 8.862944 +β+) 1.9222
162 122Sn 122 50 72 8.808590 β) 0.3661
163 124Sn 124 50 74 8.782914 β) 2.2870
164 126Xe 126 54 72 8.779010 +β+) 0.8973
165 143Nd 143 60 83 8.658792 (α) 0.5214
166 144Sm 144 62 82 8.640577 +β+, α) 1.7811, 0.0761
167 145Nd 145 60 85 8.632963 (α) 1.5784
168 146Nd 146 60 86 8.625649 β, α) 0.0702, 1.1822
169 148Nd 148 60 88 8.594388 β, α) 1.9288, 0.5986
170 150Sm 150 62 88 8.585043 (α) 1.4495
171 152Sm 152 62 90 8.563227 (α) 0.2203
172 153Eu 153 63 90 8.550893 (α) 0.2736
173 154Gd 154 64 90 8.549985 (α) 0.0812
174 154Sm 154 62 92 8.541857 β) 1.2510
175 155Gd 155 64 91 8.536341 (α) 0.0812
176 156Dy 156 66 90 8.523443 +β+, α) 2.0108, 1.7579
177 158Dy 158 66 92 8.516973 +β+, α) 0.2833, 0.8748
178 160Dy 160 66 94 8.506816 (α) 0.4387
179 161Dy 161 66 95 8.494067 (α) 0.3443
180 162Dy 162 66 96 8.492234 (α) 0.0847
181 162Er 162 68 94 8.480852 +β+, α) 1.8445, 1.6460
182 164Er 164 68 96 8.473462 +β+, α) 0.0241, 1.3041
183 165Ho 165 67 98 8.464689 (α) 0.1394
184 166Er 166 68 98 8.462482 (α) 0.8309
185 167Er 167 68 99 8.450350 (α) 0.6657
186 168Er 168 68 100 8.446308 (α) 0.5527
187 168Yb 168 70 98 8.437845 +β+, α) 1.4221, 1.9508
188 169Tm 169 69 100 8.433931 (α) 1.2004
189 170Yb 170 70 100 8.428792 (α) 1.7376
190 170Er 170 68 102 8.424945 β, α) 0.6536, 0.0502
191 171Yb 171 70 101 8.418182 (α) 1.5589
192 172Yb 172 70 102 8.415864 (α) 1.3103
193 173Yb 173 70 103 8.404023 (α) 0.9459
194 174Yb 174 70 104 8.398624 (α) 0.7401
195 175Lu 175 71 104 8.386589 (α) 1.6197
196 176Hf 176 72 104 8.381427 (α) 2.2550
197 177Hf 177 72 105 8.370139 (α) 2.2449
198 178Hf 178 72 106 8.365958 (α) 2.0832
199 179Hf 179 72 107 8.353293 (α) 1.8065
200 180Hf 180 72 108 8.347930 (α) 1.2828
201 181Ta 181 73 108 8.338961 (α) 1.5259
202 185Re 185 75 110 8.308204 (α) 2.1947
203 187Os 187 76 111 8.291746 (α) 2.7202
204 188Os 188 76 112 8.290138 (α) 2.1426
205 189Os 189 76 113 8.277599 (α) 1.9757
206 190Os 190 76 114 8.275045 (α) 1.3784
207 191Ir 191 77 114 8.263508 (α) 2.0839
208 192Pt 192 78 114 8.260353 (α) 2.4181
209 192Os 192 76 116 8.258202 β, α) 0.4135, 0.3622
210 194Pt 194 78 116 8.250519 (α) 1.5045
211 193Ir 193 77 116 8.250259 (α) 1.0173
212 195Pt 195 78 117 8.239516 (α) 1.1581
213 196Pt 196 78 118 8.237896 (α) 0.7942
214 196Hg 196 80 116 8.233710 +β+, α) 0.8197, 2.0273
215 197Au 197 79 118 8.229404 (α) 0.9545
216 198Hg 198 80 118 8.227663 (α) 1.3833
217 198Pt 198 78 120 8.222378 β, α) 1.0472, 0.0870
218 199Hg 199 80 119 8.219805 (α) 0.8242
219 200Hg 200 80 120 8.218848 (α) 0.7178
220 201Hg 201 80 121 8.208956 (α) 0.3341
221 202Hg 202 80 122 8.206703 (α) 0.1363
222 203Tl 203 81 122 8.198230 (α) 0.9108
223 204Hg 204 80 124 8.192358 β) 0.4163
224 205Tl 205 81 124 8.187526 (α) 0.1567
225 206Pb 206 82 124 8.186791 (α) 1.1366
226 207Pb 207 82 125 8.179791 (α) 0.3915
227 208Pb 208 82 126 8.175888 (α) 0.5188
 228 134Xe 134 54 80 8.728973 > 1.830×1030 ββ 0.825
 229 40Ca 40 20 20 8.942485 > 9.467×1028 β+β+ 0.194
 230 132Ba 132 56 76 8.741288 > 9.467×1028 β+β+ 0.846
 231 78Kr 78 36 42 9.022349 > 7.258×1027 β+β+ 2.846
 232 160Gd 160 64 96 8.496009 > 9.783×1026 ββ 1.729
 233 184W 184 74 110 8.319737 > 9.152×1026 α 1.656
 234 186W 186 74 112 8.299873 > 8.521×1026 α 1.123
 235 183W 183 74 109 8.324699 > 4.102×1026 α 1.680
 236 182W 182 74 108 8.336424 > 2.619×1026 α 1.772
 237 114Cd 114 48 66 8.860985 > 2.020×1026 ββ 0.540
 238 50Cr 50 24 26 9.076517 > 4.102×1025 β+β+ 1.167
 239 108Cd 108 48 60 8.897735 > 3.156×1025 β+β+ 0.272
 240 142Ce 142 58 84 8.666666 > 8.205×1024 ββ, (α) 1.417, 1.298
 241 106Cd 106 48 58 8.893327 > 8.205×1024 β+β+ 2.770
 242 176Yb 176 70 106 8.375271 > 5.049×1024 ββ, (α) 1.083, 0.570
 243 204Pb 204 82 122 8.194414 > 4.418×1024 α 1.972
 244 124Xe 124 54 70 8.778264 > 3.471×1024 β+β+ 2.864
 245 123Te 123 52 71 8.796302 > 2.903×1024 β+ 0.052
 246 64Zn 64 30 34 9.102634 > 8.836×1023 +β+) 1.096
 247 120Te 120 52 68 8.816369 > 6.943×1023 β+β+ 1.700
 248 70Zn 70 30 40 9.065109 > 4.102×1023 ββ 0.998
 249 46Ca 46 20 26 9.009047 > 8.836×1022 ββ 0.988
 250 149Sm 149 62 87 8.589058 > 6.312×1022 α 1.870
 251 180mTa 180 73 107 8.342767 > 3.787×1022 , ε, α) 0.783, 0.929, 2.103
 252 138Ce 138 58 80 8.705878 > 2.840×1021 β+β+ 0.694
 253 136Ce 136 58 78 8.707122 > 2.209×1021 β+β+ 2.419
 254 184Os 184 76 108 8.311850 > 1.767×1021 α, +β+) 2.963, 1.451

Primordial radioactive nuclides[edit]

no nuclide A Z N energy half-life (sec) decay mode decay energy (MeV) half-life (years)
255 128Te 128 52 76 8.743261 6.94×1031 ββ 2.530 2.2×1024
256 136Xe 136 54 82 8.706805 7.5×1028 ββ 2.462 2.38×1021
257 76Ge 76 32 44 9.034656 5.642×1028 ββ 2.039 1.8×1021
258 130Ba 130 56 74 8.742574 3.79×1028 εε 2.620 1.2×1021
259 82Se 82 34 48 9.017596 3.408×1027 ββ 2.995 1.1×1020
260 116Cd 116 48 68 8.836146 9.783×1026 ββ 2.809 3.1×1019
261 48Ca 48 20 28 8.992452 7.258×1026 ββ, β 4.274, 0.0058 2.3×1019
262 96Zr 96 40 56 8.961359 6.3×1026 ββ 3.348 2.0×1019
263 209Bi 209 83 126 8.158689 5.996×1026 α 3.137 1.9×1019
264 130Te 130 52 78 8.766578 2.777×1026 ββ 0.868 8.8×1018
265 150Nd 150 60 90 8.562594 2.493×1026 ββ 3.367 7.9×1018
266 100Mo 100 42 58 8.933167 2.461×1026 ββ 3.035 7.8×1018
267 151Eu 151 63 88 8.565759 1.578×1026 α 1.9644 5.0×1018
268 180W 180 74 106 8.347127 5.680×1025 α 2.509 1.8×1018
269 50V 50 23 27 9.055759 4.418×1024 β+, β 2.205, 1.038 1.4×1017
270 113Cd 113 48 65 8.859372 2.430×1023 β 0.321 7.7×1015
271 148Sm 148 62 86 8.607423 2.209×1023 α 1.986 7.0×1015
272 144Nd 144 60 84 8.652947 7.227×1022 α 1.905 2.29×1015
273 186Os 186 76 110 8.302508 6.312×1022 α 2.823 2.0×1015
274 174Hf 174 72 102 8.392287 6.312×1022 α 2.497 2.0×1015
275 115In 115 49 66 8.849910 1.392×1022 β 0.499 4.4×1014
276 152Gd 152 64 88 8.562868 3.408×1021 α 2.203 1.1×1014
277 190Pt 190 78 112 8.267764 2.051×1019 α 3.252 6.5×1011
278 147Sm 147 62 85 8.610593 3.345×1018 α 2.310 1.06×1011
279 138La 138 57 81 8.698320 3.219×1018 ε, β 1.737, 1.044 1.02×1011
280 87Rb 87 37 50 9.043718 1.568×1018 β 0.283 4.97×1010
281 187Re 187 75 112 8.291732 1.300×1018 β, α 0.0026, 1.653 4.12×1010
282 176Lu 176 71 105 8.374665 1.187×1018 β 1.193 3.764×1010
283 232Th 232 90 142 7.918533 4.434×1017 α, SF 4.083 1.406×1010
284 238U 238 92 146 7.872551 1.410×1017 α, SF 4.270 4.471×109
285 40K 40 19 21 8.909707 3.938×1016 β, ε, β+ 1.311, 1.505, 1.505 1.25×109
286 235U 235 92 143 7.897198 2.222×1016 α, SF 4.679 704×106
287 244Pu 244 94 150 7.826221 2.525×1015 α, SF 4.666 80×106
288 146Sm 146 62 84 8.626136 2.144×1015 α 2.529 68×106[3]

Radionuclides with a half life of 1 day to 50 million years[edit]

no nuclide A Z N energy half-life (sec) decay mode half-life
(years/days)
notes
289 92Nb 92 41 51 9.010980 1.095×1015 β+, β 34.7×106 y CG
290 236U 236 92 144 7.891470 7.391×1014 α, SF 23.4×106 y DP
291 205Pb 205 82 123 8.187279 5.459×1014 β+ 17.3×106 y CG
292 129I 129 53 76 8.757397 4.955×1014 β 15.7×106 y CG, FP
293 247Cm 247 96 151 7.806008 4.923×1014 α 15.6×106 y
294 182Hf 182 72 110 8.324399 2.809×1014 β 8.90×106 y (DP)
295 107Pd 107 46 61 8.897197 2.051×1014 β 6.50×106 y FP
296 98Tc 98 43 55 8.953246 1.325×1014 β 4.20×106 y
297 53Mn 53 25 28 9.103175 1.180×1014 β+ 3.74×106 y CG
298 154Dy 154 66 88 8.528457 9.467×1013 α 3.00×106 y
299 60Fe 60 26 34 9.094861 8.268×1013 β 2.62×106 y
300 97Tc 97 43 54 8.970503 8.203×1013 β+ 2.60×106 y
301 210mBi 210 83 127 8.140473 9.594×1013 α 2.58×106 y
302 135Cs 135 55 80 8.720082 7.258×1013 β 2.30×106 y FP
303 237Np 237 93 144 7.881989 6.766×1013 α, SF 2.14×106 y DP
304 150Gd 150 64 86 8.576454 5.649×1013 α 1.79×106 y
305 93Zr 93 40 53 9.008069 4.828×1013 β 1.53×106 y FP
306 10Be 10 4 6 6.810657 4.765×1013 β 1.51×106 y CG
307 26Al 26 13 13 8.540954 2.263×1013 β+ 717000 y CG
308 242Pu 242 94 148 7.845218 1.183×1013 α, SF 375000 y
309 208Bi 208 83 125 8.162049 1.161×1013 β+ 368000 y
310 248Cm 248 96 152 7.799586 1.098×1013 α, SF 348000 y
311 36Cl 36 17 19 8.891380 9.499×1012 β, β+ 301000 y CG, IM
312 79Se 79 34 45 9.032310 9.309×1012 β 295000 y FP
313 234U 234 92 142 7.908308 7.747×1012 α, SF 245500 y DP
314 126Sn 126 50 76 8.754026 7.258×1012 β 223000 y FP
315 81Kr 81 36 45 9.030513 7.227×1012 β+ 229000 y CG
316 99Tc 99 43 56 8.953379 6.662×1012 β 211100 y FP, DP
317 186mRe 186 75 111 8.295958 6.312×1012 IT 200000 y
318 233U 233 92 141 7.912873 5.024×1012 α, SF 159200 y DP
319 236Np 236 93 143 7.887514 4.860×1012 β+, β, α 154000 y
320 41Ca 41 20 21 8.928347 3.219×1012 β+ 102000 y CG
321 59Ni 59 28 31 9.107863 2.398×1012 β+ 76000 y
322 230Th 230 90 140 7.937136 2.379×1012 α, SF 75400 y DP
323 137La 137 57 80 8.707101 1.893×1012 β+ 60000 y
324 202Pb 202 82 120 8.199714 1.657×1012 β+, α 52500 y
325 231Pa 231 91 140 7.926627 1.034×1012 α, SF 32770 y DP
326 239Pu 239 94 145 7.868022 7.609×1011 α, SF 24110 y IM, DP
327 94Nb 94 41 53 8.990099 6.406×1011 β 20300 y CG
328 245Cm 245 96 149 7.822329 2.682×1011 α, SF 8500 y
329 250Cm 250 96 154 7.779371 2.619×1011 SF, α, β 8300 y
330 243Am 243 95 148 7.836035 2.326×1011 α, SF 7371 y
331 229Th 229 90 139 7.942127 2.316×1011 α 7339 y DP
332 240Pu 240 94 146 7.862465 2.070×1011 α, SF 6560 y DP
333 14C 14 6 8 7.855620 1.799×1011[4] β 5701 y[4] CG, IM
334 246Cm 246 96 150 7.816781 1.502×1011 α, SF 4760 y
335 163Ho 163 67 96 8.478591 1.442×1011 β+ 4570 y
336 93Mo 93 42 51 9.004693 1.262×1011 β+ 4000 y
337 226Ra 226 88 138 7.966597 5.049×1010 α 1600 y DP
338 247Bk 247 97 150 7.806182 4.355×1010 α 1380 y
339 166mHo 166 67 99 8.451273 3.787×1010 β 1200 y
340 251Cf 251 98 153 7.775969 2.834×1010 α, SF 898 y
341 91Nb 91 41 50 9.023327 2.146×1010 β+ 680 y
342 194Hg 194 80 114 8.237271 1.401×1010 β+ 444 y
343 108mAg 108 47 61 8.881439 1.382×1010 β+, IT 437.9 y
344 241Am 241 95 146 7.851676 1.364×1010 α, SF 432.2 y IM
345 249Cf 249 98 151 7.791305 1.108×1010 α, SF 351.1 y
346 39Ar 39 18 21 8.923686 8.489×109 β 269 y CG
347 192mIr 192 77 115 8.251875 7.605×109 IT 241 y
348 158Tb 158 65 93 8.511055 5.680×109 β+, β 180 y
349 242mAm 242 95 147 7.841913 4.450×109 IT, α, SF 141 y
350 32Si 32 14 18 8.823856 4.166×109 β 132 y CG
351 209Po 209 84 125 8.149633 3.951×109 α, β+ [5]125.2 y
352 63Ni 63 28 35 9.111210 3.159×109 β 101 y IM
353 151Sm 151 62 89 8.565251 2.840×109 β 90.0 y FP
354 238Pu 238 94 144 7.877358 2.768×109 α, SF 87.7 y IM, DP
355 157Tb 157 65 92 8.522096 2.241×109 β+ 71.0 y
356 148Gd 148 64 84 8.586706 2.237×109 α 70.9 y
357 232U 232 92 140 7.922143 2.174×109 α, SF 68.9 y (DP)
358 44Ti 44 22 22 8.924702 1.893×109 β+ 59.1 y
359 193Pt 193 78 115 8.249965 1.578×109 β+ 50.0 y
360 121mSn 121 50 71 8.808499 1.385×109 IT, β 43.89 y
361 150Eu 150 63 87 8.569974 1.164×109 β+ 36.89 y
362 42Ar 42 18 24 8.890923 1.038×109 β 32.9 y
363 207Bi 207 83 124 8.168209 1.038×109 β+ 31.6 y
364 178m2Hf 178 72 106 9.776×108 IT 31 y
365 137Cs 137 55 82 8.703047 9.477×108 β 30.1 y FP, IM
366 243Cm 243 96 147 7.836004 9.183×108 α, β+, SF 29.1 y
367 90Sr 90 38 52 9.026239 9.120×108 β 28.9 y FP, IM
368 210Pb 210 82 128 8.141462 7.006×108 β, α 22.2 y DP, IM
369 227Ac 227 89 138 7.957447 6.871×108 β, α 21.77 y DP
370 244Cm 244 96 148 7.831763 5.712×108 α, SF 18.1 y (DP)
371 145Pm 145 61 84 8.631838 5.586×108 β+, α 17.7 y
372 93mNb 93 41 52 5.084×108 IT 16.1 y
373 241Pu 241 94 147 7.851590 4.510×108 β, α, SF 14.3 y
374 113mCd 113 48 65 4.380×108 β, IT 13.9 y FP
375 152Eu 152 63 89 8.550897 4.262×108 β+, β 13.51 y
376 250Cf 250 98 152 7.786640 4.128×108 α, SF 13.08 y
377 3H 3 1 2 3.087994 3.888×108 β 12.32 y CG, IM
378 85Kr 85 36 49 9.029919 3.384×108 β 10.72 y FP, IM
379 133Ba 133 56 77 8.729624 3.319×108 β+ 10.52 y
380 248Bk 248 97 151 7.796811 > 2.840×108 α 9.00 y
381 154Eu 154 63 91 8.537200 2.711×108 β, β+ 8.60 y
382 194Os 194 76 118 8.238508 1.893×108 β 6.0 y
383 228Ra 228 88 140 7.944390 1.815×108 β 5.75 y DP
384 146Pm 146 61 85 8.615574 1.745×108 β+, β 5.53 y
385 60Co 60 27 33 9.098811 1.663×108 β 5.27 y IM
386 155Eu 155 63 92 8.534711 1.500×108 β 4.75 y FP
387 204Tl 204 81 123 8.190671 1.193×108 β, β+ 3.78 y IM
388 174Lu 174 71 103 8.390726 1.045×108 β+ 3.31 y
389 101Rh 101 45 56 8.936753 1.041×108 β+ 3.3 y
390 102mRh 102 45 57 8.920680 9.152×107 β+, IT 2.9 y
391 208Po 208 84 124 8.155315 9.145×107 α, β+ 2.898 y
392 236Pu 236 94 142 7.889536 9.019×107 α, SF 2.858 y
393 125Sb 125 51 74 8.777367 8.705×107 β 2.759 y FP
394 55Fe 55 26 29 9.116407 8.637×107 β+ 2.737 y
395 252Cf 252 98 154 7.769605 8.347×107 α, SF 2.645 y IM
396 147Pm 147 61 86 8.609068 8.279×107 β 2.624 y FP, DP
397 22Na 22 11 11 8.306891 8.213×107 β+ 2.603 y CG
398 134Cs 134 55 79 8.719768 6.517×107 β, β+ 2.065 y FP
399 171Tm 171 69 102 8.417620 6.059×107 β 1.92 y
400 228Th 228 90 138 7.953906 6.033×107 α 1.912 y DP
401 172Hf 172 72 100 8.399252 5.901×107 β+ 1.87 y
402 179Ta 179 73 106 8.352703 5.743×107 β+ 1.82 y
403 173Lu 173 71 102 8.400147 4.323×107 β+ 1.37 y
404 252Es 252 99 153 7.764621 4.075×107 α, β+, β 1.291 y
405 109Cd 109 48 61 8.883327 3.986×107 β+ 1.263 y
406 235Np 235 93 142 7.896669 3.422×107 β+, α 1.084 y
407 106Ru 106 44 62 8.885686 3.228×107 β 1.023 y FP
408 144Pm 144 61 83 8.636751 3.136×107 β+ 363 d
409 145Sm 145 62 83 8.627590 2.938×107 β+ 340 d
410 248Cf 248 98 150 7.800198 2.881×107 α, SF 333.4 d
411 249Bk 249 97 152 7.790805 2.851×107 β, α, SF 330 d
412 49V 49 23 26 9.050040 2.843×107 β+ 329.1 d
413 54Mn 54 25 29 9.100131 2.697×107 β+, β 312.2 d IM
414 119m1Sn 119 50 69 2.534×107 IT 293.1 d
415 144Ce 144 58 86 8.629918 2.462×107 β 285 d FP
416 254Es 254 99 155 7.748524 2.382×107 α, β, SF, β+ 275.7 d
417 57Co 57 27 30 9.112454 2.348×107 β+ 271.8 d IM
418 68Ge 68 32 36 9.056327 2.341×107 β+ 271 d IM
419 143Pm 143 61 82 8.651509 2.290×107 β+ 265 d
420 110mAg 110 47 63 8.865355 2.158×107 β, IT 249.8 d
421 65Zn 65 30 35 9.085352 2.105×107 β+ 243.6 d IM
422 153Gd 153 64 89 8.547731 2.077×107 β+ 240.4 d IM
423 102Rh 102 45 57 1.788×107 β+, β 207 d
424 195Au 195 79 116 8.238353 1.608×107 β+ 186.1 d
425 194mIr 194 77 117 8.238025 1.477×107 β 170.9 d
426 184mRe 184 75 109 8.310670 1.460×107 IT, β+ 169 d
427 242Cm 242 96 146 7.844860 1.407×107 α, SF 162.8 d
428 45Ca 45 20 25 8.978261 1.405×107 β 162.6 d
429 177mLu 177 71 106 8.361829 1.386×107 β, IT 160.4 d
430 121mTe 121 52 69 8.800749 1.331×107 IT, β+ 154.1 d
431 159Dy 159 66 93 8.506378 1.248×107 β+ 144.4 d
432 174m1Lu 174 71 103 1.227×107 IT, EC 142 d
433 210Po 210 84 126 8.147295 1.196×107 α 138.4 d DP
434 139Ce 139 58 81 8.696881 1.189×107 β+ 137.6 d
435 123Sn 123 50 73 8.785311 1.116×107 β 129.2 d
436 170Tm 170 69 101 8.423096 1.111×107 β, β+ 128.6 d
437 151Gd 151 64 87 8.562685 1.071×107 β+, α 124 d
438 181W 181 74 107 8.337924 1.047×107 β+ 121.2 d
439 75Se 75 34 41 9.033581 1.035×107 β+ 119.8 d IM
440 123mTe 123 52 71 1.03×107 IT 119.2 d
441 113Sn 113 50 63 8.853035 9.944×106 β+ 115.1 d
442 182Ta 182 73 109 8.326456 9.887×106 β 114.4 d
443 127mTe 127 52 75 8.765759 9.418×106 IT 109 d
444 88Y 88 39 49 9.029272 9.212×106 β+ 106.6 d
445 257Fm 257 100 157 7.726619 8.683×106 α, SF 100.5 d
446 185Os 185 76 109 8.302730 8.087×106 β+ 93.6 d
447 168Tm 168 69 99 8.436316 8.044×106 β+, β 93.1 d
448 149Eu 149 63 86 8.584395 8.044×106 β+ 93.1 d
449 97mTc 97 43 54 7.862×106 IT 91 d
450 35S 35 16 19 8.895510 7.561×106 β 87.51 d CG
451 83Rb 83 37 46 9.024038 7.448×106 β+ 86.2 d
452 46Sc 46 21 25 8.979091 7.239×106 β 83.78 d
453 88Zr 88 40 48 9.021589 7.206×106 β+ 83.4 d
454 73As 73 33 40 9.043341 6.938×106 β+ 80.3 d
455 56Co 56 27 29 9.072031 6.673×106 β+ 77.23 d
456 185W 185 74 111 8.305866 6.489×106 β 75.1 d
457 192Ir 192 77 115 6.379×106 β 73.827 d IM
458 160Tb 160 65 95 8.495346 6.247×106 β 72.3 d
459 58Co 58 27 31 9.103153 6.122×106 β+ 70.86 d
460 183Re 183 75 108 8.321661 6.048×106 β+ 70 d
461 175Hf 175 72 103 8.382665 6.048×106 β+ 70 d
462 188W 188 74 114 8.277003 6.029×106 β 69.78 d
463 85Sr 85 38 47 9.025480 5.602×106 β+ 64.84 d
464 95Zr 95 40 55 8.972989 5.532×106 β 64.03 d FP
465 95mTc 95 43 52 8.976359 5.270×106 β+, IT 61 d
466 91mNb 91 41 50 5.258×106 IT,ε 60.86 d
467 254Cf 254 98 156 7.751087 5.227×106 SF, α 60.5 d
468 124Sb 124 51 73 8.777943 5.194×106 β 60.12 d
469 125I 125 53 72 8.782019 5.132×106 β+ 59.4 d IM
470 91Y 91 39 52 9.020174 5.055×106 β 58.51 d FP
471 125mTe 125 52 73 4.959×106 IT 57.4 d
472 148Eu 148 63 85 8.586882 4.709×106 β+, α 54.5 d
473 7Be 7 4 3 5.818470 4.598×106 β+ 53.22 d CG
474 258Md 258 101 157 7.715948 4.450×106 α, SF 51.5 d
475 89Sr 89 38 51 9.039969 4.369×106 β 50.57 d FP, IM
476 114mIn 114 49 65 8.846608 4.278×106 IT, β+ 49.51 d
477 146Gd 146 64 82 8.592512 4.171×106 β+ 48.28 d
478 203Hg 203 80 123 8.195806 4.026×106 β 46.6 d
479 237Pu 237 94 143 7.881060 3.905×106 β+, α 45.2 d
480 115mCd 115 48 67 8.835754 3.850×106 β 44.56 d
481 59Fe 59 26 33 9.099516 3.844×106 β 44.49 d IM
482 181Hf 181 72 109 8.333272 3.662×106 β 42.38 d
483 148mPm 148 61 87 8.589800 3.567×106 β, IT 41.28 d
484 105Ag 105 47 58 8.900547 3.567×106 β+ 41.28 d
485 255Es 255 99 156 7.741567 3.439×106 β, α, SF 39.8 d
486 103Ru 103 44 59 8.918500 3.392×106 β 39.26 d FP
487 127Xe 127 54 73 8.766768 3.145×106 β+ 36.4 d
488 184Re 184 75 109 3.059×106 β+ 35.4 d
489 95Nb 95 41 54 8.984821 3.023×106 β 34.99 d FP
490 37Ar 37 18 19 8.907752 3.020×106 β+ 34.95 d CG
491 129mTe 129 52 77 8.744953 2.903×106 IT, β 33.6 d
492 84Rb 84 37 47 9.020732 2.860×106 β+, β 33.1 d
493 241Cm 241 96 145 7.848492 2.834×106 β+, α 32.8 d
494 141Ce 141 58 83 8.677286 2.809×106 β 32.51 d FP
495 169Yb 169 70 99 8.428546 2.767×106 β+ 32.03 d IM
496 260Md 260 101 159 7.699789 2.748×106 SF, α, β+, β 31.81 d
497 51Cr 51 24 27 9.080127 2.393×106 β+ 27.7 d IM
498 240Cm 240 96 144 7.855805 2.333×106 α, β+, SF 27 d
499 233Pa 233 91 142 7.910426 2.331×106 β 26.98 d
500 82Sr 82 38 44 8.998254 2.208×106 β+ 25.56 d IM
501 33P 33 15 18 8.869434 2.189×106 β 25.34 d
502 179m2Hf 179 72 107 2.164×106 IT 25.05 d
503 234Th 234 90 144 7.897763 2.082×106 β 24.1 d DP
504 147Eu 147 63 84 8.598879 2.082×106 β+, α 24.1 d
505 178W 178 74 104 8.354563 1.866×106 β+ 21.6 d
506 230U 230 92 138 7.933871 1.797×106 α, SF 20.8 d
507 253Es 253 99 154 7.759019 1.769×106 α, SF 20.5 d
508 121Te 121 52 69 1.656×106 ε 19.2 d
509 227Th 227 90 137 7.957644 1.614×106 α 18.7 d DP
510 86Rb 86 37 49 9.033502 1.611×106 β, β+ 18.6 d
511 253Cf 253 98 155 7.757885 1.539×106 β, α 17.8 d
512 74As 74 33 41 9.028895 1.535×106 β+, β 17.8 d
513 230Pa 230 91 139 7.931436 1.503×106 β+, β, α 17.4 d
514 103Pd 103 46 57 8.920638 1.468×106 β+ 17.0 d IM
515 99Rh 99 45 54 8.935711 1.391×106 β+ 16.1 d
516 48V 48 23 25 8.997890 1.380×106 β+ 15.97 d
517 191Os 191 76 115 8.261870 1.331×106 β 15.41 d
518 205Bi 205 83 122 8.174069 1.323×106 β+ 15.31 d
519 156Eu 156 63 93 8.520642 1.312×106 β 15.19 d
520 225Ra 225 88 137 7.973576 1.287×106 β 14.9 d
521 32P 32 15 17 8.830865 1.232×106 β 14.26 d CG, IM
522 117mSn 117 50 67 1.21×106 IT 14 d
523 143Pr 143 59 84 8.652258 1.172×106 β 13.56 d
524 189Ir 189 77 112 8.274783 1.140×106 β+ 13.19 d
525 136Cs 136 55 81 8.706171 1.127×106 β 13.04 d
526 126I 126 53 73 8.769026 1.117×106 β+, β 12.93 d
527 140Ba 140 56 84 8.666120 1.102×106 β 12.75 d FP
528 126Sb 126 51 75 8.757042 1.067×106 β 12.35 d
529 202Tl 202 81 121 8.199956 1.057×106 β+ 12.23 d
530 131mXe 131 54 77 1.023×106 IT 11.84 d
531 190Ir 190 77 113 8.264755 1.018×106 β+ 11.78 d
532 131Ba 131 56 75 8.733037 9.936×105 β+ 11.5 d
533 223Ra 223 88 135 7.994042 9.876×105 α 11.43 d DP, IM
534 71Ge 71 32 39 9.055943 9.876×105 β+ 11.43 d
535 147Nd 147 60 87 8.602973 9.487×105 β 10.98 d
536 246Pu 246 94 152 7.805494 9.366×105 β 10.84 d
537 193mIr 193 77 116 9.098×105 IT 10.53 d
538 188Pt 188 78 110 8.272514 8.813×105 β+, α 10.2 d
539 92mNb 92 41 51 8.770×105 β+, α 10.15 d
540 225Ac 225 89 136 7.975159 8.571×105 α 9.92 d DP
541 131Cs 131 55 76 8.743541 8.371×105 β+ 9.69 d IM
542 125Sn 125 50 75 8.758515 8.329×105 β 9.64 d
543 169Er 169 68 101 8.431852 8.115×105 β 9.39 d IM
544 149Gd 149 64 85 8.575576 8.018×105 β+, α 9.28 d
545 167Tm 167 69 98 8.445866 7.992×105 β+ 9.25 d
546 129mXe 129 54 75 7.672×105 IT 8.88 d
547 206Po 206 84 122 8.159590 7.603×105 β+, α 8.80 d
548 72Se 72 34 38 9.014300 7.258×105 β+ 8.40 d
549 106mAg 106 47 59 8.890639 7.154×105 β+ 8.28 d
550 171Lu 171 71 100 8.409532 7.119×105 β+ 8.24 d
551 131I 131 53 78 8.738842 6.930×105 β 8.02 d FP, IM
552 257Es 257 99 158 7.723468 6.653×105 β, SF 7.7 d
553 111Ag 111 47 64 8.866111 6.437×105 β 7.45 d
554 161Tb 161 65 96 8.490383 5.967×105 β 6.91 d
555 237U 237 92 145 7.879800 5.832×105 β 6.75 d
556 172Lu 172 71 101 8.401217 5.789×105 β+ 6.70 d IM
557 177Lu 177 71 106 5.743×105 β 6.65 d
558 132Cs 132 55 77 8.731599 5.599×105 β+, β 6.48 d
559 206Bi 206 83 123 8.168551 5.394×105 β+ 6.24 d
560 196Au 196 79 117 8.230205 5.328×105 β+, β 5.17 d
561 56Ni 56 28 28 9.033899 5.249×105 β+ 6.08 d
562 118Te 118 52 66 8.814726 5.184×105 β+ 6 d
563 145Eu 145 63 82 8.609245 5.124×105 β+ 5.93 d
564 120mSb 120 51 69 8.808194 4.977×105 β+ 5.76 d
565 52Mn 52 25 27 9.046431 4.831×105 β+ 5.59 d
566 148Pm 148 61 87 4.638×105 β 5.37 d
567 156Tb 156 65 91 8.520667 4.622×105 β+ 5.35 d
568 155Tb 155 65 90 8.531031 4.596×105 β+ 5.32 d
569 133Xe 133 54 79 8.730302 4.530×105 β 5.24 d IM
570 183Ta 183 73 110 8.318847 4.406×105 β 5.10 d
571 210Bi 210 83 127 4.330×105 β, α 5.01 d DP
572 245Bk 245 97 148 7.819020 4.268×105 β+, α 4.94 d
573 119mTe 119 52 67 8.801773 4.061×105 β+, IT 4.7 d
574 146Eu 146 63 83 8.599560 3.983×105 β+ 4.61 d
575 47Ca 47 20 27 8.972181 3.919×105 β 4.54 d
576 234Np 234 93 141 7.900571 3.802×105 β+ 4.4 d
577 101mRh 101 45 56 3.74×105 ε, IT 4.34 d
578 193mPt 193 78 115 3.74×105 IT 4.33 d
579 96Tc 96 43 53 8.965255 3.698×105 β+ 4.28 d
580 231U 231 92 139 7.924977 3.629×105 β+, α 4.2 d
581 175Yb 175 70 105 8.383902 3.616×105 β 4.19 d
582 124I 124 53 71 8.775884 3.608×105 β+ 4.18 d IM
583 195mPt 195 78 117 3.46×105 IT 4.01 d
584 127Sb 127 51 76 8.754005 3.326×105 β 3.85 d
585 222Rn 222 86 136 7.997573 3.304×105 α 3.82 d DP
586 186Re 186 75 111 3.21×105 β−,e 3.72 d IM
587 224Ra 224 88 136 7.987277 3.138×105 α 3.63 d DP
588 100Pd 100 46 54 8.923587 3.136×105 β+ 3.63 d
589 95mNb 95 41 54 3.11×105 IT, β− 3.61 d
590 166Dy 166 66 100 8.448376 2.938×105 β 3.4 d
591 140Nd 140 60 80 8.673113 2.912×105 β+ 3.37 d
592 47Sc 47 21 26 9.014564 2.894×105 β 3.35 d
593 87Y 87 39 48 9.025565 2.873×105 β+ 3.33 d
594 89Zr 89 40 49 9.024912 2.823×105 β+ 3.27 d
595 67Ga 67 31 36 9.069532 2.819×105 β+ 3.26 d IM
596 132Te 132 52 80 8.716646 2.768×105 β 3.2 d FP
597 134Ce 134 58 76 8.704432 2.730×105 β+ 3.16 d
598 199Au 199 79 120 8.217534 2.712×105 β 3.14 d
599 201Tl 201 81 120 8.206561 2.625×105 β+ 3.04 d IM
600 253Fm 253 100 153 7.757691 2.592×105 β+, α 3. d
601 191Pt 191 78 113 8.258228 2.473×105 β+ 2.86 d
602 111In 111 49 62 8.867688 2.423×105 β+ 2.8 d IM
603 97Ru 97 44 53 8.959080 2.411×105 β+ 2.79 d
604 99Mo 99 42 57 8.939669 2.375×105 β 2.75 d FP, IM
605 122Sb 122 51 71 8.795346 2.353×105 β, β+ 2.72 d
606 71As 71 33 38 9.027581 2.350×105 β+ 2.72 d
607 198Au 198 79 119 8.220732 2.329×105 β 2.7 d IM
608 197Hg 197 80 117 8.226358 2.309×105 β+ 2.67 d
609 90Y 90 39 51 9.032294 2.306×105 β 2.67 d IM
610 182Re 182 75 107 8.321053 2.304×105 β+ 2.67 d
611 172Tm 172 69 103 8.404932 2.290×105 β 2.65 d
612 67Cu 67 29 38 9.076086 2.226×105 β 2.58 d IM
613 44mSc 44 21 23 8.924627 2.110×105 IT, β+ 2.44 d
614 128Ba 128 56 72 8.738523 2.100×105 β+ 2.43 d
615 77Br 77 35 42 9.022431 2.053×105 β+ 2.38 d
616 166Yb 166 70 96 8.442340 2.041×105 β+ 2.36 d
617 177Ta 177 73 104 8.363553 2.036×105 β+ 2.36 d
618 239Np 239 93 146 7.864999 2.036×105 β 2.36 d DP
619 153Tb 153 65 88 8.537471 2.022×105 β+ 2.34 d
620 66Ni 66 28 38 9.071423 1.966×105 β 2.28 d
621 247Pu 247 94 153 7.791975 1.961×105 β 2.27 d
622 198m2Au 198 79 119 1.96×105 IT 2.27 d
623 115Cd 115 48 67 1.92×105 β− 2.23 d
624 149Pm 149 61 88 8.581871 1.911×105 β 2.21 d
625 133mXe 133 54 79 1.89×105 IT 2.20 d
626 203Pb 203 82 121 8.193431 1.869×105 β+ 2.16 d
627 238Np 238 93 145 7.871931 1.829×105 β 2.12 d
628 240Am 240 95 145 7.856694 1.829×105 β+, α 2.12 d
629 172Er 172 68 104 8.399752 1.775×105 β 2.05 d
630 170Lu 170 71 99 8.408445 1.738×105 β+ 2.01 d
631 72Zn 72 30 42 9.017591 1.674×105 β 1.94 d
632 153Sm 153 62 91 8.545614 1.666×105 β 1.93 d IM
633 202Pt 202 78 124 8.183209 1.584×105 β 1.83 d
634 48Sc 48 21 27 8.998327 1.572×105 β 1.82 d
635 246Bk 246 97 149 7.811287 1.555×105 β+, α 1.8 d
636 195mHg 195 80 115 8.229399 1.498×105 IT, β+ 1.73 d
637 188Ir 188 77 111 8.275200 1.494×105 β+ 1.73 d
638 140La 140 57 83 8.673620 1.450×105 β 1.68 d
639 254mEs 254 99 155 1.41×105 β−, IT, α, EC, SF 1.64 d
640 69Ge 69 32 37 9.043800 1.406×105 β+ 1.63 d
641 133mBa 133 56 77 1.4×105 IT,e 1.62 d
642 77As 77 33 44 9.031283 1.398×105 β 1.62 d
643 119Sb 119 51 68 8.823235 1.375×105 β+ 1.59 d
644 147Gd 147 64 83 8.584001 1.370×105 β+ 1.59 d
645 194Au 194 79 115 8.237626 1.369×105 β+ 1.58 d
646 229Pa 229 91 138 7.940769 1.296×105 β+, α 1.5 d
647 246Cf 246 98 148 7.810792 1.285×105 α, β+, SF 1.49 d
648 57Ni 57 28 29 9.055222 1.282×105 β+ 1.48 d
649 105Rh 105 45 60 8.907956 1.273×105 β 1.47 d FP
650 82Br 82 35 47 9.016407 1.270×105 β 1.47 d
651 79Kr 79 36 43 9.013644 1.261×105 β+ 1.46 d
652 137mCe 137 58 79 8.696327 1.238×105 IT, β+ 1.43 d
653 169Lu 169 71 98 8.414978 1.226×105 β+ 1.42 d
654 143Ce 143 58 85 8.642041 1.189×105 β 1.38 d
655 251Es 251 99 152 7.774467 1.188×105 β+, α 1.38 d
656 83Sr 83 38 45 8.996568 1.167×105 β+ 1.35 d
657 129Cs 129 55 74 8.749622 1.154×105 β+ 1.34 d
658 268Db 268 105 163 7.635133 1.152×105 SF, EC 1.33 d
659 232Pa 232 91 141 7.916379 1.132×105 β, β+ 1.31 d
660 193Os 193 76 117 8.244348 1.084×105 β 1.25 d
661 165Tm 165 69 96 8.452758 1.082×105 β+ 1.25 d
662 131mTe 131 52 79 8.720392 1.080×105 β, IT 1.25 d
663 226Ac 226 89 137 7.963761 1.057×105 β, β+, α 1.22 d
664 160Er 160 68 92 8.484190 1.029×105 β+ 1.19 d
665 151Pm 151 61 90 8.557387 1.022×105 β 1.18 d
666 135mBa 135 56 79 1.01×105 IT 1.17 d
667 121Sn 121 50 71 9.73×104 β− 1.13 d
668 166Ho 166 67 99 9.65×104 β− 1.12 d IM
669 76As 76 33 43 9.022505 9.454×104 β 1.09 d
670 200Tl 200 81 119 8.206567 9.396×104 β+ 1.09 d
671 72As 72 33 39 9.018966 9.360×104 β+ 1.08 d
672 231Th 231 90 141 7.924932 9.187×104 β, α 1.06 d DP
673 252Fm 252 100 152 7.766498 9.140×104 α, SF 1.06 d
674 252Cm 252 96 156 7.757439 8.99×104 β [6]1.04 d
675 156mTb 156 65 91 8.78×104 IT 1.02 d
676 189Re 189 75 114 8.272269 8.748×104 β 1.01 d

Radionuclides with half-lives of 1.0 hour to 24 hours[edit]

no nuclide energy half-life decay mode
641 187W 8.284722 8.539×104 β
642 173Hf 8.391617 8.496×104 β+
643 96Nb 8.963036 8.406×104 β
644 154mTb 8.526912 8.172×104 β+, IT
645 43K 8.922327 8.028×104 β
646 182Os 8.316432 7.956×104 β+
647 228Pa 7.944468 7.920×104 β+, α
648 48Cr 8.963390 7.762×104 β+
649 200Pb 8.202542 7.740×104 β+
650 112Pd 8.842185 7.571×104 β
651 28Mg 8.607706 7.529×104 β
652 100Rh 8.927167 7.488×104 β+
653 133I 8.717094 7.488×104 β
654 122Xe 8.770959 7.236×104 β+
655 255Fm 7.742704 7.225×104 α, SF
656 181Re 8.328294 7.164×104 β+
657 197Pt 8.225756 7.161×104 β
658 135La 8.713179 7.020×104 β+
659 142Pr 8.661417 6.883×104 β, β+
660 200mAu 8.202877 6.732×104 β, IT
661 159Gd 8.502576 6.652×104 β
662 135Ce 8.698179 6.372×104 β+
663 193Au 8.244353 6.354×104 β+
664 151Tb 8.545692 6.339×104 β+, α
665 55Co 9.053647 6.311×104 β+
666 152Tb 8.536591 6.300×104 β+, α
667 188Re 8.278860 6.121×104 β
668 125Xe 8.768864 6.084×104 β+
669 97Zr 8.926451 6.028×104 β
670 186Ir 8.281935 5.990×104 β+
671 86Zr 8.975979 5.940×104 β+
672 76Br 8.996183 5.832×104 β+
673 170Hf 8.402210 5.764×104 β+
674 157Eu 8.513792 5.465×104 β
675 24Na 8.422082 5.382×104 β
676 76Kr 8.979406 5.328×104 β+
677 86Y 8.993234 5.306×104 β+
678 211Rn 8.112825 5.256×104 β+, α
679 90Nb 8.989727 5.256×104 β+
680 185Ir 8.289382 5.184×104 β+
681 240U 7.851682 5.076×104 β
682 72Ga 9.023958 5.074×104 β
683 69mZn 9.056536 4.954×104 IT, β
684 109Pd 8.875061 4.932×104 β
685 123I 8.786311 4.760×104 β+
686 265Rf 7.661139 4.680×104 α
687 183Os 8.309907 4.680×104 β+
688 64Cu 9.093581 4.572×104 β+, β
689 200Pt 8.204342 4.500×104 β
690 130I 8.740035 4.450×104 β
691 42K 8.905175 4.436×104 β
692 171Hf 8.395480 4.356×104 β+
693 239Am 7.864666 4.284×104 β+, α
694 193mHg 8.231483 4.248×104 β+, IT
695 203Bi 8.177436 4.234×104 β+
696 77Ge 8.996185 4.068×104 β
697 204Bi 8.172651 4.039×104 β+
698 266Lr   3.960×104 SF
699 189Pt 8.264359 3.913×104 β+
700 212Pb 8.106928 3.830×104 β
701 175Ta 8.370813 3.780×104 β+
702 245Pu 7.813752 3.780×104 β
703 187Ir 8.283713 3.780×104 β+
704 165Er 8.462406 3.730×104 β+
705 93Y 8.976951 3.665×104 β
706 244Am 7.825914 3.636×104 β
707 266Rf 7.658170 3.600×104 α, SF
708 155Dy 8.517521 3.564×104 β+
709 91Sr 8.990503 3.467×104 β
710 66Ga 9.036843 3.416×104 β+
711 156Sm 8.516007 3.384×104 β
712 201Pb 8.196989 3.359×104 β+
713 62Zn 9.057957 3.307×104 β+
714 135Xe 8.711453 3.290×104 β
715 128Sb 8.732343 3.244×104 β
716 234Pu 7.898892 3.168×104 β+, α
717 184Ta 8.304154 3.132×104 β
718 250Es 7.778407 3.096×104 β+, α
719 101Pd 8.917149 3.049×104 β+
720 52Fe 9.000789 2.979×104 β+
721 173Tm 8.396524 2.966×104 β
722 157Dy 8.513544 2.930×104 β+
723 210At 8.128337 2.916×104 β+, α
724 176Ta 8.363202 2.912×104 β+
725 166Tm 8.444183 2.772×104 β+
726 256mEs 7.730742 2.736×104 β
727 171Er 8.408901 2.706×104 β
728 199Tl 8.212333 2.671×104 β+
729 211At 8.126527 2.597×104 β+, α
730 73Se 9.005821 2.574×104 β+
731 234Pa 7.898930 2.412×104 β
732 135I 8.691994 2.365×104 β
733 107Cd 8.884271 2.340×104 β+
734 82mRb 8.999608 2.330×104 β+, IT
735 153Dy 8.523288 2.304×104 β+, α
736 127Cs 8.750383 2.250×104 β+
737 228Ac 7.944591 2.214×104 β
738 145Pr 8.620514 2.154×104 β
739 207Po 8.154158 2.088×104 β+, α
740 90Mo 8.962072 2.002×104 β+
741 257Md 7.725040 1.987×104 β+, α, SF
742 111mPd 8.844589 1.980×104 IT, β
743 139mNd 8.659529 1.980×104 β+, IT
744 209At 8.132954 1.948×104 β+, α
745 113Ag 8.841531 1.933×104 β
746 198Tl 8.210166 1.908×104 β+
747 251Fm 7.768590 1.908×104 β+, α
748 138Nd 8.665661 1.814×104 β+
749 160mHo 8.485877 1.807×104 IT, β+
750 118mSb 8.814963 1.800×104 β+
751 243Pu 7.833648 1.784×104 β
752 192Au 8.242036 1.778×104 β+
753 110In 8.857464 1.764×104 β+
754 133mCe 8.690771 1.764×104 β+
755 94Tc 8.966583 1.758×104 β+
756 85mY 8.986880 1.750×104 β+, IT
757 73Ga 9.026112 1.750×104 β
758 192Hg 8.238051 1.746×104 β+
759 132La 8.705721 1.728×104 β+
760 179Lu 8.345428 1.652×104 β
761 81Rb 9.002871 1.645×104 β+
762 243Bk 7.829801 1.620×104 β+, α
763 105Ru 8.889689 1.598×104 β
764 80mBr 9.018872 1.591×104 IT
765 139Pr 8.681565 1.588×104 β+
766 129Sb 8.727358 1.584×104 β
767 244Bk 7.822491 1.566×104 β+, α
768 109In 8.864805 1.512×104 β+
769 184Hf 8.296871 1.483×104 β
770 149Tb 8.551166 1.482×104 β+, α
771 110Sn 8.851727 1.480×104 β+
772 262Lr 7.681556 1.440×104 SF, β+, α
773 71mZn 9.017370 1.426×104 β, IT
774 141La 8.659540 1.411×104 β
775 133La 8.714109 1.408×104 β+
776 43Sc 8.912907 1.401×104 β+
777 195mIr 8.233326 1.368×104 β, IT
778 92Y 8.993208 1.274×104 β
779 204Po 8.161200 1.271×104 β+, α
780 132Ce 8.696131 1.264×104 β+
781 150Tb 8.545394 1.253×104 β+, α
782 117mCd 8.808840 1.210×104 β
783 61Cu 9.087452 1.200×104 β+
784 209Pb 8.155607 1.171×104 β
785 254Fm 7.752808 1.166×104 α, SF
786 250Bk 7.779523 1.156×104 β
787 161Er 8.476352 1.156×104 β+
788 190mRe 8.257433 1.152×104 β, IT
789 191Au 8.248343 1.145×104 β+
790 173Ta 8.374218 1.130×104 β+
791 112Ag 8.844756 1.127×104 β
792 247Cf 7.803566 1.120×104 β+, α
793 184Ir 8.286599 1.112×104 β+
794 45Ti 8.938121 1.109×104 β+
795 167Ho 8.444304 1.081×104 β
796 269Db 7.630064 1.080×104 α, SF
797 239Cm 7.857143 1.044×104 β+, α
798 197Tl 8.215190 1.022×104 β+
799 88Kr 8.976918 1.022×104 β
800 38S 8.778196 1.022×104 β
801 117Sb 8.828977 1.008×104 β+
802 224Ac 7.980993 1.001×104 β+, α, β
803 93Tc 8.970274 9.900×103 β+
804 150Pm 8.562014 9.648×103 β
805 92Sr 8.972067 9.576×103 β
806 256Fm 7.737398 9.456×103 SF, α
807 31Si 8.811618 9.438×103 β
808 56Mn 9.087572 9.284×103 β
809 65Ni 9.073267 9.062×103 β
810 176W 8.359055 9.000×103 β+
811 116Te 8.806414 8.964×103 β+
812 141Nd 8.668476 8.964×103 β+
813 161Ho 8.488737 8.928×103 β+
814 210Rn 8.117032 8.640×103 α, β+
815 198Pb 8.202893 8.640×103 β+
816 238Cm 7.863764 8.640×103 β+, α
817 83Br 9.023243 8.640×103 β
818 152Dy 8.532670 8.568×103 β+, α
819 178mTa 8.355075 8.496×103 β+
820 187Pt 8.267638 8.460×103 β+
821 165Dy 8.456891 8.402×103 β
822 267Rf 7.647357 8.280×103 SF
823 132I 8.720570 8.262×103 β
824 158Er 8.484619 8.244×103 β+
825 66Ge 9.004964 8.136×103 β+
826 129Ba 8.730746 8.028×103 β+
827 177W 8.352118 7.920×103 β+
828 106mRh 8.884761 7.860×103 β
829 138mPr 8.671088 7.632×103 β+
830 121I 8.784443 7.632×103 β+
831 127Sn 8.728800 7.560×103 β
832 123Xe 8.764409 7.488×103 β+
833 186Pt 8.274897 7.488×103 β+, α
834 245Am 7.818674 7.380×103 β
835 89Nb 8.977507 7.308×103 β+
836 117mIn 8.828849 6.972×103 β, IT
837 177Yb 8.359401 6.880×103 β
838 196Tl 8.211618 6.624×103 β+
839 18F 8.022789 6.585×103 β+
840 41Ar 8.877852 6.577×103 β
841 163Tm 8.456205 6.516×103 β+
842 239Pa 7.848148 6.480×103 β
843 201Bi 8.177875 6.480×103 β+, α
844 207At 8.135303 6.480×103 β+, α
845 224Rn 7.971327 6.420×103 β
846 80Sr 8.950177 6.378×103 β+
847 181Os 8.311935 6.300×103 β+
848 205Po 8.156737 6.264×103 β+, α
849 149Nd 8.570529 6.221×103 β
850 202Bi 8.173966 6.192×103 β+, α
851 249Es 7.785464 6.132×103 β+, α
852 147Tb 8.552634 6.120×103 β+
853 87Zr 8.983373 6.048×103 β+
854 126Ba 8.727439 6.000×103 β+
855 61Co 9.102449 5.940×103 β
856 95Ru 8.949749 5.915×103 β+
857 238Am 7.867882 5.880×103 β+, α
858 208At 8.131376 5.868×103 β+, α
859 75Br 8.993181 5.802×103 β+
860 259Md 7.709860 5.760×103 SF, α
861 230Ra 7.921249 5.580×103 β
862 142La 8.634954 5.466×103 β
863 78As 9.004879 5.442×103 β
864 199Pb 8.198111 5.400×103 β+
865 78Ge 8.992635 5.280×103 β
866 255Cf 7.738739 5.100×103 β
867 196mIr 8.219440 5.040×103 β, IT
868 139Ba 8.682217 4.984×103 β
869 75Ge 9.029413 4.967×103 β
870 120I 8.769577 4.896×103 β+
871 256Md 7.729062 4.620×103 β+, α, SF
872 137Pr 8.678459 4.608×103 β+
873 87Kr 8.999022 4.578×103 β
874 164Yb 8.443419 4.548×103 β+
875 163Er 8.471168 4.500×103 β+
876 77Kr 8.982618 4.464×103 β+
877 178Yb 8.350530 4.440×103 β
878 267Db 7.644361 4.380×103 SF
879 237Am 7.874830 4.380×103 β+, α
880 142Sm 8.627616 4.349×103 β+
881 97Nb 8.953864 4.326×103 β
882 185Pt 8.269598 4.254×103 β+
883 195Tl 8.215712 4.176×103 β+
884 104Ag 8.889702 4.152×103 β+
885 174Ta 8.368684 4.104×103 β+
886 68Ga 9.057888 4.063×103 β+
887 162mHo 8.478371 4.020×103 IT, β+
888 103Ag 8.894541 3.942×103 β+
889 249Cm 7.787191 3.849×103 β
890 183Hf 8.307885 3.841×103 β
891 229Ac 7.937048 3.762×103 β
892 117Te 8.798652 3.720×103 β+
893 240Np 7.853348 3.714×103 β
894 212Bi 8.109617 3.633×103 β, α
895 116mSb 8.816483 3.618×103 β+
896 148Tb 8.547949 3.600×103 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.[7] For more recent updates, see reference.[8] 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. ^ Table data is derived by counting members of the list; see WP:CALC. References for the list data itself are given below in this reference section
  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. ^ previously estimated at 103 million years but see Kinoshita, N.; Paul, M.; Kashiv, Y.; Collon, P.; Deibel, C. M.; DiGiovine, B.; Greene, J. P.; Henderson, D. J.; Jiang, C. L.; Marley, S. T.; Nakanishi, T.; Pardo, R. C.; Rehm, K. E.; Robertson, D.; Scott, R.; Schmitt, C.; Tang, X. D.; Vondrasek, R.; Yokoyama, A. (30 March 2012). "A Shorter 146Sm Half-Life Measured and Implications for 146Sm-142Nd Chronology in the Solar System". Science. 335 (6076): 1614–1617. doi:10.1126/science.1215510. ISSN 0036-8075. Retrieved 20 May 2016. 
  4. ^ a b Other sources give the half-life of 14C as 5730 years (=1.808×1011 seconds)
  5. ^ Boutin, Chad. "Polonium's Most Stable Isotope Gets Revised Half-Life Measurement". nist.gov. NIST Tech Beat. Retrieved 9 September 2014. 
  6. ^ 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
  7. ^ Jagdish K. Tuli, Nuclear Wallet Cards, 7th edition, April 2005, Brookhaven National Laboratory, US National Nuclear Data Center
  8. ^ Interactive Chart of Nuclides (Brookhaven National Laboratory)

External links[edit]