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Half-Lives for Several Radioactive Isotopes
Isotope Half-Life[1] Type of Emission[2] Isotope Half-Life[3] Type of Emission[4]
614C 5730 y (β−) 83210Bi 5.01 d (β−)
713N 9.97 m (β+) 83212Bi 60.55 m (αorβ−)
915F 4.1 × 10−22 s (p) 84210Po 138.4 d (α)
1124Na 15.00 h (β−) 84212Po 3 × 10−7 s (α)
1532P 14.29 d (β−) 84216Po 0.15 s (α)
1940K 1.27 × 109 y (βorE.C.) 84218Po 3.05 m (α)
2649Fe 0.08 s (β+) 85215At 1.0 × 10−4 s (α)
2660Fe 2.6 × 106 y (β−) 85218At 1.6 s (α)
2760Co 5.27 y (β−) 86220Rn 55.6 s (α)
3787Rb 4.7 × 1010 y (β−) 86222Rn 3.82 d (α)
3890Sr 29 y (β−) 88224Ra 3.66 d (α)
49115In 5.1 × 1015 y (β−) 88226Ra 1600 y (α)
53131I 8.040 d (β−) 88228Ra 5.75 y (β−)
58142Ce 5 × 1015 y (α) 89228Ac 6.13 h (β−)
81208Tl 3.07 m (β−) 90228Th 1.913 y (α)
82210Pb 22.3 y (β−) 90232Th 1.4 × 1010 y (α)
82212Pb 10.6 h (β−) 90233Th 22 m (β−)
82214Pb 26.8 m (β−) 90234Th 24.10 d24.10 d (β−)
83206Bi 6.243 d (E.C.) 91233Pa 27 d (β−)
92233U 1.59 × 105 y (α) 96242Cm 162.8 d (α)
92234U 2.45 × 105 y (α) 97243Bk 4.5 h (αorE.C.)
92235U 7.03 × 108 y (α) 99253Es 20.47 d (α)
92238U 4.47 × 109 y (α) 100254Fm 3.24 h (αorS.F.)
92239U 23.54 m (β−) 100255Fm 20.1 h (α)
93239Np 2.3 d (β−) 101256Md 76 m (αorE.C.)
94239Pu 2.407 × 104 y (α) 102254No 55 s (α)
94239Pu 6.54 × 103 y (α) 103257Lr 0.65 s (α)
94241Pu 14.4 y (αorβ−) 105260Ha 1.5 s (αorS.F.)
95241Am 432.2 y (α) 106263Sg 0.8 s (αorS.F.)

  1. y = years, d = days, h = hours, m = minutes, s = seconds ↵
  2. E.C. = electron capture, S.F. = Spontaneous fission ↵
  3. y = years, d = days, h = hours, m = minutes, s = seconds ↵
  4. E.C. = electron capture, S.F. = Spontaneous fission ↵

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College of Western Idaho General Chemistry: CHEM 111 & 112 Copyright © 2016 by Rice University is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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