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Chemistry LibreTexts

12.13: Half-Lives for Several Radioactive Isotopes

  • Page ID
    233067
  • Isotope Half-Life[1] Type of Emission[2] Isotope Half-Life[3] Type of Emission[4]
    {}_{6}^{14}\text{C} \text{5730 y} \left({\beta }^{-}\right) {}_{83}^{210}\text{Bi} \text{5}.0\text{1 d} \left({\beta }^{-}\right)
    {}_{7}^{13}\text{N} \text{9}\text{.97 m} \left({\beta }^{+}\right) {}_{83}^{212}\text{Bi} \text{6}0.\text{55 m} \left(\alpha \text{ or }{\beta }^{-}\right)
    {}_{9}^{15}\text{F} 4.1 \times {10}^{-22}\text{s} \left(p\right) {}_{84}^{210}\text{Po} \text{138}.\text{4 d} \left(\alpha \right)
    {}_{11}^{24}\text{Na} \text{15}\text{.00 h} \left({\beta }^{-}\right) {}_{84}^{212}\text{Po} 3 \times {10}^{-7}\text{s} \left(\alpha \right)
    {}_{15}^{32}\text{P} \text{14}\text{.29 d} \left({\beta }^{-}\right) {}_{84}^{216}\text{Po} 0.\text{15 s} \left(\alpha \right)
    {}_{19}^{40}\text{K} 1.27 \times {10}^{9}\text{y} \left(\beta \text{ or }E.C.\right) {}_{84}^{218}\text{Po} \text{3}.0\text{5 m} \left(\alpha \right)
    {}_{26}^{49}\text{Fe} \text{0}\text{.08 s} \left({\beta }^{+}\right) {}_{85}^{215}\text{At} 1.0 \times {10}^{-4}\text{s} \left(\alpha \right)
    {}_{26}^{60}\text{Fe} 2.6 \times {10}^{6}\text{y} \left({\beta }^{-}\right) {}_{85}^{218}\text{At} \text{1}.\text{6 s} \left(\alpha \right)
    {}_{27}^{60}\text{Co} \text{5}\text{.27 y} \left({\beta }^{-}\right) {}_{86}^{220}\text{Rn} \text{55}.\text{6 s} \left(\alpha \right)
    {}_{37}^{87}\text{Rb} 4.7 \times {10}^{10}\text{y} \left({\beta }^{-}\right) {}_{86}^{222}\text{Rn} \text{3}.\text{82 d} \left(\alpha \right)
    {}_{38}^{90}\text{Sr} \text{29 y} \left({\beta }^{-}\right) {}_{88}^{224}\text{Ra} \text{3}.\text{66 d} \left(\alpha \right)
    {}_{49}^{115}\text{In} 5.1 \times {10}^{15}\text{y} \left({\beta }^{-}\right) {}_{88}^{226}\text{Ra} \text{16}00\text{ y} \left(\alpha \right)
    {}_{53}^{131}\text{I} \text{8}\text{.040 d} \left({\beta }^{-}\right) {}_{88}^{228}\text{Ra} \text{5}.\text{75 y} \left({\beta }^{-}\right)
    {}_{58}^{142}\text{Ce} 5 \times {10}^{15}\text{y} \left(\alpha \right) {}_{89}^{228}\text{Ac} \text{6}.\text{13 h} \left({\beta }^{-}\right)
    {}_{81}^{208}\text{Tl} \text{3}\text{.07 m} \left({\beta }^{-}\right) {}_{90}^{228}\text{Th} \text{1}.\text{913 y} \left(\alpha \right)
    {}_{82}^{210}\text{Pb} \text{22}\text{.3 y} \left({\beta }^{-}\right) {}_{90}^{232}\text{Th} 1.4 \times {10}^{10}\text{y} \left(\alpha \right)
    {}_{82}^{212}\text{Pb} \text{10}\text{.6 h} \left({\beta }^{-}\right) {}_{90}^{233}\text{Th} \text{22 m} \left({\beta }^{-}\right)
    {}_{82}^{214}\text{Pb} \text{26}\text{.8 m} \left({\beta }^{-}\right) {}_{90}^{234}\text{Th} \text{24}.\text{1}0\text{ d} \left({\beta }^{-}\right)
    {}_{83}^{206}\text{Bi} \text{6}\text{.243 d} \left(E.C.\right) {}_{91}^{233}\text{Pa} \text{27 d} \left({\beta }^{-}\right)
    {}_{92}^{233}\text{U} 1.59 \times {10}^{5}\text{y} \left(\alpha \right) {}_{96}^{242}\text{Cm} \text{162}.\text{8 d} \left(\alpha \right)
    {}_{92}^{234}\text{U} 2.45 \times {10}^{5}\text{y} \left(\alpha \right) {}_{97}^{243}\text{Bk} \text{4}.\text{5 h} \left(\alpha \text{ or }E.C.\right)
    {}_{92}^{235}\text{U} 7.03 \times {10}^{8}\text{y} \left(\alpha \right) {}_{99}^{253}\text{Es} \text{2}0.\text{47 d} \left(\alpha \right)
    {}_{92}^{238}\text{U} 4.47 \times {10}^{9}\text{y} \left(\alpha \right) {}_{100}^{254}\text{Fm} \text{3}.\text{24 h} \left(\alpha \text{ or }S.F.\right)
    {}_{92}^{239}\text{U} \text{23}\text{.54 m} \left({\beta }^{-}\right) {}_{100}^{255}\text{Fm} \text{2}0.\text{1 h} \left(\alpha \right)
    {}_{93}^{239}\text{Np} \text{2}\text{.3 d} \left({\beta }^{-}\right) {}_{101}^{256}\text{Md} \text{76 m} \left(\alpha \text{ or }E.C.\right)
    {}_{94}^{239}\text{Pu} 2.407 \times {10}^{4}\text{y} \left(\alpha \right) {}_{102}^{254}\text{No} \text{55 s} \left(\alpha \right)
    {}_{94}^{240}\text{Pu} 6.54 \times {10}^{3}\text{y} \left(\alpha \right) {}_{103}^{257}\text{Lr} 0.\text{65 s} \left(\alpha \right)
    {}_{94}^{241}\text{Pu} \text{14}\text{.4 y} \left(\alpha \text{ or }{\beta }^{-}\right) {}_{105}^{260}\text{Ha} \text{1}.\text{5 s} \left(\alpha \text{ or }S.F.\right)
    {}_{95}^{241}\text{Am} \text{432}\text{.2 y} \left(\alpha \right) {}_{106}^{263}\text{Sg} 0.\text{8 s} \left(\alpha \text{ or }S.F.\right)

    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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