List of radioactive nuclides by half-life

This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days, and years.

10−24 seconds (yoctoseconds)

isotope half-life
10−24 seconds
hydrogen-7 23
hydrogen-5 80
hydrogen-4 139
nitrogen-10 200
hydrogen-6 290
lithium-5 304
boron-7 350
oxygen-12 580
nitrogen-11 590
nitrogen-11m 690
lithium-4 756
helium-5 760

10−21 seconds (zeptoseconds)

isotope half-life
10−21 seconds
sodium-18 1.34
helium-10 1.52
lithium-10 2
carbon-8 2
helium-7 3.040
beryllium-6 5
helium-9 7
boron-9 80

10−18 seconds (attoseconds)

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

10−15 seconds (femtoseconds)

10−12 seconds (picoseconds)

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

10−9 seconds (nanoseconds)

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 (microseconds)

isotope half-life
10−6 seconds
darmstadtium-267 3
nobelium-250 5.7
rutherfordium-254 23
darmstadtium-270 160
polonium-214 164
darmstadtium-273 170
darmstadtium-269 230
copernicium-277 240
nihonium-278 340
fermium-258 370
hassium-264 540
fermium-241 730
hassium-263 760
hassium-265 780
fermium-242 800
oganesson-294 890

10−3 seconds (milliseconds)

isotope half-life
10−3 seconds
hassium-265 2
hassium-266 2.7
boron-19 2.92
meitnerium-266 3.4
radon-196 4.7
boron-17 5.08
carbon-22 6.2
oxygen-13 8.58
lithium-11 8.59
meitnerium-275 9.7
boron-15 9.87
nitrogen-12 11
boron-14 12.5
nitrogen-22 13.9
nitrogen-23 14.5
carbon-20 16
boron-13 17.33
boron-12 20.2
beryllium-12 21.49
hassium-267 32
carbon-19 46.2
oxygen-24 65
oxygen-23 82
nitrogen-21 87
carbon-18 92
bohrium-262 102
helium-8 119
carbon-9 126.5
nitrogen-20 130
hassium-275 150±100
lithium-9 178.3
nitrogen-19 271
carbon-17 193
nitrogen-18 622
carbon-16 747
boron-8 770
helium-6 806.7
lithium-8 839.9
lutetium-153 900

100 seconds

isotope half-life
seconds
oxygen-22 2.25
carbon-15 2.449
flerovium-289 2.6
oxygen-21 3.42
nitrogen-17 4.173
beryllium-14 4.84
nitrogen-16 7.13
oxygen-20 13.51
beryllium-11 13.81
carbon-10 19.29
oxygen-19 26.464
hassium-269 27
dubnium-261 27
seaborgium-266 30
dubnium-262 34
minutes seconds
oxygen-14 1.1770 70.62
rutherfordium-261 1.35 81
nobelium-253 1.62 97
oxygen-15 2.0373 122.24
copper-62 9.673 580.4
nitrogen-13 9.965 597.9
mercury-210[1] 10 600
[free] neutron, 1
0
n
14.692 881.5

103 seconds (kiloseconds)

isotope half-life
minutes 103 seconds
carbon-1120.334 1.2200
nobelium-25958 3.5
hours 103 seconds
fluorine-181.8295 6.586
mendelevium-2575.52 19.9
erbium-16510.36 37.3
sodium-2414.96 53.9
days 103 seconds
fermium-2521.058 91.4
erbium-1601.191 102.9
neptunium-2392.356 203.6
gold-1982.695 232.8
fermium-2533 260
gold-1993.169 273.8
radon-2223.8235 330.35
calcium-474.536 391.9
manganese-525.591 483.1
gold-1966.183 534.2
iodine-1318.02 693
thulium-1679.25 799

106 seconds (megaseconds)

isotope half-life
days 106 seconds
phosphorus-32 14.29 1.235
vanadium-48 15.9735 1.38011
californium-25317.81 1.539
chromium-5127.7025 2.39350
mendelevium-25851.5 4.45
beryllium-753.12 4.590
californium-25460.5 5.23
cobalt-5677.27 6.676
scandium-4683.79 7.239
sulfur-3587.32 7.544
thulium-16893.1 8.04
fermium-257100.5 8.68
thulium-170128.6 11.11
polonium-210138 11.9
calcium-45162.7 14.06
gold-195186.1 16.08
zinc-65243.7 21.06
cobalt-57271.79 23.483
vanadium-49330 29
californium-248333.5 28.81
years 106 seconds
ruthenium-1061.023 32.3
neptunium-2351.084 34.2
cadmium-1091.267 40.0
thulium-1711.92 61
caesium-1342.0652 65.17
sodium-222.602 82.1
iron-552.756 87.0
rhodium-1013.3 100
cobalt-605.2714 166.35
krypton-8510.756 339.4
hydrogen-312.32 389
californium-25013.08 413
niobium
meta state Nb-93m
16.13 509
strontium-9028.79 909
curium-24329.1 920
caesium-13730.17 952

109 seconds (gigaseconds)

isotope half-life
years 109 seconds
titanium-4463 2.0
uranium-23268.9 2.17
plutonium-23887.7 2.77
samarium-15196.6 3.05
nickel-63100.1 3.16
silicon-32170 5.4
argon-39269 8.5
californium-249351 11.1
silver-108(m)418 13.2
americium-241432.2 13.64
mercury-194444 14.0
niobium-91680 21
californium-251898 28.3
holmium-166(m1)1,200 38
berkelium-2471,380 44
radium-2261,600 50
molybdenum-934,000 130
holmium-1634,570 144
curium-2464,730 149
carbon-14[2]5,730 181
plutonium-2406,563 207.1
thorium-2297,340 232
americium-2437,370 233
curium-2458,500 270
curium-2509,000 280
niobium-9420,300 640
plutonium-23924,110 761

1012 seconds (teraseconds)

isotope half-life
103 years 1012 seconds
protactinium-23132.76 1.034
lead-20252.5 1.66
lanthanum-13760 1.9
thorium-23075.38 2.379
nickel-5976 2.4
calcium-41103 3.3
neptunium-236154 4.9
uranium-233159.2 5.02
rhenium-186(m)200 6.3
technetium-99211.1 6.66
krypton-81229 7.2
tin-126230 7.3
uranium-234245.5 7.75
plutonium-242272.3 8.59
chlorine-36301 9.5
curium-248340 11
bismuth-208368 11.6
aluminium-26717 22.6
106 years 1012 seconds
selenium-791.13 36
beryllium-101.36 43
zirconium-931.53 48
gadolinium-1501.79 56
neptunium-2372.144 67.7
caesium-1352.3 73
iron-602.6 82
technetium-972.6 82
dysprosium-1543.0 95
bismuth-210(m)3.04 96
manganese-533.7 120
technetium-984.2 130
palladium-1076.5 210
hafnium-1828.9 280
lead-20517.3 550
curium-24715.6 490
iodine-12915.7 500
uranium-23623.42 739

1015 seconds (petaseconds)

isotope half-life
106 years 1015 seconds
niobium-9234.7 1.10
samarium-14668 2.1
plutonium-24480 2.5
uranium-235703.8 22.21
109 years 1015 seconds
potassium-401.277 40.3
uranium-2384.468 141.0
thorium-23214.056 443.6

1018 seconds (exaseconds)

isotope half-life
109 years 1018 seconds
lutetium-17638.5 1.21
rhenium-18741.2 ± .2 1.3002 ± 0.0063
rubidium-8749.23 1.554
lanthanum-138102 3.2
samarium-147106 3.3
platinum-190650 ± 30 20.51 ± 0.95

1021 seconds (zettaseconds)

isotope half-life
1012 years 1021 seconds
gadolinium-152108 3.4
indium-115441 13.9
1015 years 1021 seconds
hafnium-1742.0 63
osmium-1862.0 63
neodymium-1442.29 72
samarium-1487 220
cadmium-1137.7 240

1024 seconds (yottaseconds)

isotope half-life
1015 years 1024 seconds
vanadium-50140 ± 40 4.4 ± 1.3
1018 years 1024 seconds
tungsten-1801.8 ± .2 56.8 ± 6.3
europium-1515 160
neodymium-1506.7 210
molybdenum-1008.5 270
bismuth-20919 ± 2 600 ± 63
zirconium-9620 630
cadmium-11631 ± 4 980 ± 130

1027 seconds

isotope half-life
1018 years 1027 seconds
calcium-4843 1.4
selenium-8297 3.1
tellurium-130790 25
1021 years 1027 seconds
barium-1301.6 50
germanium-761.8 57
xenon-1362.38 75
krypton-789.2 290
xenon-12418 570

1030 seconds

isotope half-life
1024 years 1030 seconds
tellurium-1282.2 ± 0.3 69.4 ± 9.5

Tellurium-128's half-life is over 160 trillion times greater than the age of the universe.[3]

See also

Notes

  1. https://ptable.com/#Isotope
  2. 14
    C
    is used in radiocarbon dating.
  3. Walker, John. "Barely Radioactive Elements". www.fourmilab.ch. Retrieved 2018-03-09.
  • Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above.
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