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N1: Half-Lives for Several Radioactive Isotopes

Half-Lives for Several Radioactive Isotopes
Isotope Half-Life1 Type of Emission2 Isotope Half-Life3 Type of Emission4
\(\ce{^{14}_6C}\) 5730 y \((β^−)\) \(\ce{^{210}_{83}Bi}\) 5.01 d \((β^−)\)
\(\ce{^{13}_7N}\) 9.97 m \((β^+)\) \(\ce{^{212}_{83}Bi}\) 60.55 m \((α\textrm{ or }β^−)\)
\(\ce{^{15}_9F}\) 4.1 × 10−22 s \((p)\) \(\ce{^{210}_{84}Po}\) 138.4 d \((α)\)
\(\ce{^{24}_{11}Na}\) 15.00 h \((β^−)\) \(\ce{^{212}_{84}Po}\) 3 × 10−7 s \((α)\)
\(\ce{^{32}_{15}P}\) 14.29 d \((β^−)\) \(\ce{^{216}_{84}Po}\) 0.15 s \((α)\)
\(\ce{^{40}_{19}K}\) 1.27 × 109 y \((β\textrm{ or }E.C.)\) \(\ce{^{218}_{84}Po}\) 3.05 m \((α)\)
\(\ce{^{49}_{26}Fe}\) 0.08 s \((β^+)\) \(\ce{^{215}_{85}At}\) 1.0 × 10−4 s \((α)\)
\(\ce{^{60}_{26}Fe}\) 2.6 × 106 y \((β^−)\) \(\ce{^{218}_{85}At}\) 1.6 s \((α)\)
\(\ce{^{60}_{27}Co}\) 5.27 y \((β^−)\) \(\ce{^{220}_{86}Rn}\) 55.6 s \((α)\)
\(\ce{^{87}_{37}Rb}\) 4.7 × 1010 y \((β^−)\) \(\ce{^{222}_{86}Rn}\) 3.82 d \((α)\)
\(\ce{^{90}_{38}Sr}\) 29 y \((β^−)\) \(\ce{^{224}_{88}Ra}\) 3.66 d \((α)\)
\(\ce{^{115}_{49}In}\) 5.1 × 1015 y \((β^−)\) \(\ce{^{226}_{88}Ra}\) 1600 y \((α)\)
\(\ce{^{131}_{53}I}\) 8.040 d \((β^−)\) \(\ce{^{228}_{88}Ra}\) 5.75 y \((β^−)\)
\(\ce{^{142}_{58}Ce}\) 5 × 1015 y \((α)\) \(\ce{^{228}_{89}Ac}\) 6.13 h \((β^−)\)
\(\ce{^{208}_{81}Tl}\) 3.07 m \((β^−)\) \(\ce{^{228}_{90}Th}\) 1.913 y \((α)\)
\(\ce{^{210}_{82}Pb}\) 22.3 y \((β^−)\) \(\ce{^{232}_{90}Th}\) 1.4 × 1010 y \((α)\)
\(\ce{^{212}_{82}Pb}\) 10.6 h \((β^−)\) \(\ce{^{233}_{90}Th}\) 22 m \((β^−)\)
\(\ce{^{214}_{82}Pb}\) 26.8 m \((β^−)\) \(\ce{^{234}_{90}Th}\) 24.10 d \((β^−)\)
\(\ce{^{206}_{83}Bi}\) 6.243 d \((E.C.)\) \(\ce{^{233}_{91}Pa}\) 27 d \((β^−)\)
\(\ce{^{233}_{92}U}\) 1.59 × 105 y \((α)\) \(\ce{^{242}_{96}Cm}\) 162.8 d \((α)\)
\(\ce{^{234}_{92}U}\) 2.45 × 105 y \((α)\) \(\ce{^{243}_{97}Bk}\) 4.5 h \((α\textrm{ or }E.C.)\)
\(\ce{^{235}_{92}U}\) 7.03 × 108 y \((α)\) \(\ce{^{253}_{99}Es}\) 20.47 d \((α)\)
\(\ce{^{238}_{92}U}\) 4.47 × 109 y \((α)\) \(\ce{^{254}_{100}Fm}\) 3.24 h \((α\textrm{ or }S.F.)\)
\(\ce{^{239}_{92}U}\) 23.54 m \((β^−)\) \(\ce{^{255}_{100}Fm}\) 20.1 h \((α)\)
\(\ce{^{239}_{93}Np}\) 2.3 d \((β^−)\) \(\ce{^{256}_{101}Md}\) 76 m \((α\textrm{ or }E.C.)\)
\(\ce{^{239}_{94}Pu}\) 2.407 × 104 y \((α)\) \(\ce{^{254}_{102}No}\) 55 s \((α)\)
\(\ce{^{239}_{94}Pu}\) 6.54 × 103 y \((α)\) \(\ce{^{257}_{103}Lr}\) 0.65 s \((α)\)
\(\ce{^{241}_{94}Pu}\) 14.4 y \((α\textrm{ or }β^−)\) \(\ce{^{260}_{105}Ha}\) 1.5 s \((α\textrm{ or }S.F.)\)
\(\ce{^{241}_{95}Am}\) 432.2 y \((α)\) \(\ce{^{263}_{106}Sg}\) 0.8 s \((α\textrm{ or }S.F.)\)

Footnotes

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