List of radioactive isotopes by half-life

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This is a list of radioactive isotopes ordered by half-life from shortest to longest.

10−24 seconds[edit]

isotope half-life
10−24 seconds
hydrogen-7 23
hydrogen-5 80
hydrogen-4 100
nitrogen-10 200
hydrogen-6 290
lithium-5 324
lithium-4 325
boron-7 350
helium-5 760

10−21 seconds[edit]

isotope half-life
10−21 seconds
helium-10 1.52
lithium-10 2
carbon-8 2
helium-7 3.040
beryllium-6 5
helium-9 7
boron-9 800

10−18 seconds[edit]

isotope half-life
10−18 seconds
beryllium-8 81.9

10−15 seconds[edit]

10−12 seconds[edit]

isotope half-life
10−12 seconds
boron-16 190
beryllium-13 500

10−9 seconds[edit]

isotope half-life
10−9 seconds
lithium-12 10
boron-18 26
carbon-21 30
beryllium-15 200
beryllium-16 200
polonium-212 299

10−6 seconds[edit]

isotope half-life
10−6 seconds
Darmstadtium-267 3
Nobelium-250 5.7
Rutherfordium-254 23
Darmstadtium-270 160
Darmstadtium-273 170
Darmstadtium-269 230
Copernicium-277 240
Ununtrium-278 340
Fermium-258 370
Hassium-264 540
Fermium-241 730
Hassium-263 760
Fermium-242 800
Ununoctium-294 890

10−3 seconds[edit]

isotope half-life
10−3 seconds
hassium-265 2
boron-19 2.92
meitnerium-266 3.4
boron-17 5.08
carbon-22 6.2
lithium-11 8.59
boron-15 9.87
boron-14 12.5
carbon-20 16
boron-13 17.33
boron-12 20.2
beryllium-12 21.49
carbon-19 46.2
carbon-18 92
bohrium-262 102
helium-8 119
carbon-9 126.5
lithium-9 178.3
carbon-17 193
carbon-16 747
boron-8 770
helium-6 806.7
lithium-8 839.9

100 seconds[edit]

isotope half-life
seconds
carbon-15 2.449
flerovium-289 2.6
beryllium-14 4.84
beryllium-11 13.81
carbon-10 19.29
dubnium-261 27
seaborgium-266 30
dubnium-262 34
minutes seconds
rutherfordium-261 1.35 81
nobelium-253 1.62 97

103 seconds[edit]

isotope half-life
minutes 103 seconds
carbon-11 20.334 1.2200
nobelium-259 58 3.5
hours 103 seconds
fluorine-18 1.8295 6.586
mendelevium-257 5.52 19.9
erbium-165 10.36 37.3
sodium-24 14.96 53.9
days 103 seconds
fermium-252 1.058 91.4
erbium-160 1.191 102.9
fermium-253 3 260
radon-222 3.8235 330.35
manganese-52 5.591 483.1
iodine-131 8.02 693
thulium-167 9.25 799

106 seconds[edit]

isotope half-life
days 106 seconds
phosphorus-32 14.29 1.235
vanadium-48 15.9735 1.38011
californium-253 17.81 1.539
chromium-51 27.7025 2.39350
mendelevium-258 51.5 4.45
beryllium-7 53.12 4.590
californium-254 60.5 5.23
cobalt-56 77.27 6.676
scandium-46 83.79 7.239
sulfur-35 87.32 7.544
thulium-168 93.1 8.04
fermium-257 100.5 8.68
thulium-170 128.6 11.11
polonium-210 138 11.9
cobalt-57 271.79 23.483
vanadium-49 330 29
californium-248 333.5 28.81
years 106 seconds
ruthenium-106 1.023 32.3
neptunium-235 1.084 34.2
cadmium-109 1.267 40.0
thulium-171 1.92 61
caesium-134 2.0652 65.17
sodium-22 2.602 82.1
rhodium-101 3.3 100
cobalt-60 5.2714 166.35
hydrogen-3 12.32 389
californium-250 13.08 413
niobium
meta state Nb-93m
16.13 509
strontium-90 28.79 909
curium-243 29.1 920
caesium-137 30.17 952

109 seconds[edit]

isotope half-life
years 109 seconds
titanium-44 63 2.0
uranium-232 68.9 2.17
plutonium-238 87.7 2.77
samarium-151 96.6 3.05
nickel-63 100.1 3.16
silicon-32 170 5.4
argon-39 269 8.5
californium-249 351 11.1
silver-108 418 13.2
americium-241 432.2 13.64
niobium-91 680 21
californium-251 898 28.3
holmium-166(m1) 1,200 38
berkelium-247 1,380 44
radium-226 1,600 50
molybdenum-93 4,000 130
holmium-153 4,570 144
curium-246 4,730 149
carbon-14[1] 5,730 181
plutonium-240 6,563 207.1
thorium-229 7,340 232
americium-243 7,370 233
curium-245 8,500 270
curium-250 9,000 280
tin-126 10,000 320
niobium-94 20,300 640
plutonium-239 24,110 761

1012 seconds[edit]

isotope half-life
103 years 1012 seconds
protactinium-231 32.76 1.034
lead-202 52.5 1.66
lanthanum-137 60 1.9
thorium-230 75.38 2.379
nickel-59 76 2.4
calcium-41 103 3.3
neptunium-236 154 4.9
uranium-233 159.2 5.02
rhenium-186(m) 200 6.3
technetium-99 211.1 6.66
krypton-81 229 7.2
uranium-234 245.5 7.75
chlorine-36 301 9.5
curium-248 340 11
bismuth-208 368 11.6
plutonium-242 272.3 8.59
aluminium-26 717 22.6
106 years 1012 seconds
selenium-79 1.13 36
iron-60 1.5 47
beryllium-10 1.36 43
zirconium-93 1.53 48
gadolinium-150 1.79 56
neptunium-237 2.144 67.7
caesium-135 2.3 73
technetium-97 2.6 82
dysprosium-154 3 95
bismuth-210(m) 3.04 96
manganese-53 3.7 120
technetium-98 4.2 130
palladium-107 6.5 210
hafnium-182 9 280
lead-205 15.3 480
curium-247 15.6 490
iodine-129 15.7 500
uranium-236 23.42 739

1015 seconds[edit]

isotope half-life
106 years 1015 seconds
niobium-92 34.7 1.10
plutonium-244 80 2.5
samarium-146 103.5 3.27
uranium-235 703.8 22.21
109 years 1015 seconds
potassium-40 1.277 40.3
uranium-238 4.468 141.0
thorium-232 14.056 443.6

1018 seconds[edit]

isotope half-life
109 years 1018 seconds
lutetium-176 38.5 1.21
rhenium-187 41.2 ± .2 1.3002 ± 0.0063
rubidium-87 49.23 1.554
lanthanum-138 102 3.2
samarium-147 106 3.3
platinum-190 650 ± 30 20.51 ± 0.95

1021 seconds[edit]

isotope half-life
1012 years 1021 seconds
gadolinium-152 108 3.4
indium-115 441 13.9
1015 years 1021 seconds
tantalum-180m 1.0 32
hafnium-174 2.0 63
osmium-186 2.0 63
neodymium-144 2.29 72
samarium-148 7 220
cadmium-113 7.7 240

1024 seconds[edit]

isotope half-life
1015 years 1024 seconds
vanadium-50 140 ± 40 4.4 ± 1.3
1018 years 1024 seconds
tungsten-180 1.8 ± .2 56.8 ± 6.3
europium-151 5 160
neodymium-150 6.7 210
molybdenum-100 8.5 270
bismuth-209 19 ± 2 600 ± 63
zirconium-96 20 630
cadmium-116 31 ± 4 980 ± 130

1027 seconds[edit]

isotope half-life
1018 years 1027 seconds
calcium-48 43 1.4
selenium-82 97 3.1
tellurium-130 790 25
1021 years 1027 seconds
barium-130 1.6 50
germanium-76 1.8 57
xenon-136 2.38 75

1030 seconds[edit]

isotope half-life
1024 years 1030 seconds
tellurium-128 2.2 ± 0.3 69.4 ± 9.5

See also[edit]

Notes[edit]

  1. ^ 14
    C
    is used in radiocarbon dating.

External links[edit]

  • Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above.