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Appendix M: Half-Lives for Several Radioactive Isotopes

Half-Lives for Several Radioactive Isotopes
Isotope Half-Life1 Type of Emission2 Isotope Half-Life3 Type of Emission4
{}_{\phantom{\rule{0.5em}{0ex}}6}^{14}\text{C} 5730 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}83}^{210}\text{Bi} 5.01 d \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}7}^{13}\text{N} 9.97 m \left({\beta }^{\text{+}}\right) {}_{\phantom{\rule{0.5em}{0ex}}83}^{212}\text{Bi} 60.55 m \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}{\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}9}^{15}\text{F} 4.1 x 10−22 s \left(p\right) {}_{\phantom{\rule{0.5em}{0ex}}84}^{210}\text{Po} 138.4 d \left(\alpha \right)
{}_{11}^{24}\text{Na} 15.00 h \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}84}^{212}\text{Po} 3 x 10−7 s \left(\alpha \right)
{}_{15}^{32}\text{P} 14.29 d \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}84}^{216}\text{Po} 0.15 s \left(\alpha \right)
{}_{19}^{40}\text{K} 1.27 x 109 y \left(\beta \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}E.C.\right) {}_{\phantom{\rule{0.5em}{0ex}}84}^{218}\text{Po} 3.05 m \left(\alpha \right)
{}_{26}^{49}\text{Fe} 0.08 s \left({\beta }^{\text{+}}\right) {}_{\phantom{\rule{0.5em}{0ex}}85}^{215}\text{At} 1.0 x 10−4 s \left(\alpha \right)
{}_{26}^{60}\text{Fe} 2.6 x 106 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}85}^{218}\text{At} 1.6 s \left(\alpha \right)
{}_{27}^{60}\text{Co} 5.27 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}86}^{220}\text{Rn} 55.6 s \left(\alpha \right)
{}_{37}^{87}\text{Rb} 4.7 x 1010 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}86}^{222}\text{Rn} 3.82 d \left(\alpha \right)
{}_{38}^{90}\text{Sr} 29 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}88}^{224}\text{Ra} 3.66 d \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}49}^{115}\text{In} 5.1 x 1015 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}88}^{226}\text{Ra} 1600 y \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}53}^{131}\text{I} 8.040 d \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}88}^{228}\text{Ra} 5.75 y \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}58}^{142}\text{Ce} 5 x 1015 y \left(\alpha \right) {}_{\phantom{\rule{0.5em}{0ex}}89}^{228}\text{Ac} 6.13 h \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}81}^{208}\text{Tl} 3.07 m \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}90}^{228}\text{Th} 1.913 y \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}82}^{210}\text{Pb} 22.3 y \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}90}^{232}\text{Th} 1.4 x 1010 y \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}82}^{212}\text{Pb} 10.6 h \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}90}^{233}\text{Th} 22 m \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}82}^{214}\text{Pb} 26.8 m \left({\beta }^{\text{−}}\right) {}_{\phantom{\rule{0.5em}{0ex}}90}^{234}\text{Th} \text{24.10 d} \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}83}^{206}\text{Bi} 6.243 d \left(E.C.\right) {}_{\phantom{\rule{0.5em}{0ex}}91}^{233}\text{Pa} 27 d \left({\beta }^{\text{−}}\right)
{}_{\phantom{\rule{0.5em}{0ex}}92}^{233}\text{U} 1.59 x 105 y \left(\alpha \right) {}_{\phantom{\rule{0.5em}{0ex}}96}^{242}\text{Cm} 162.8 d \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}92}^{234}\text{U} 2.45 x 105 y \left(\alpha \right) {}_{\phantom{\rule{0.5em}{0ex}}97}^{243}\text{Bk} 4.5 h \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}E.C.\right)
{}_{\phantom{\rule{0.5em}{0ex}}92}^{235}\text{U} 7.03 x 108 y \left(\alpha \right) {}_{\phantom{\rule{0.5em}{0ex}}99}^{253}\text{Es} 20.47 d \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}92}^{238}\text{U} 4.47 x 109 y \left(\alpha \right) {}_{100}^{254}\text{Fm} 3.24 h \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}S.F.\right)
{}_{\phantom{\rule{0.5em}{0ex}}92}^{239}\text{U} 23.54 m \left({\beta }^{\text{−}}\right) {}_{100}^{255}\text{Fm} 20.1 h \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}93}^{239}\text{Np} 2.3 d \left({\beta }^{\text{−}}\right) {}_{101}^{256}\text{Md} 76 m \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}E.C.\right)
{}_{\phantom{\rule{0.5em}{0ex}}94}^{239}\text{Pu} 2.407 x 104 y \left(\alpha \right) {}_{102}^{254}\text{No} 55 s \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}94}^{239}\text{Pu} 6.54 x 103 y \left(\alpha \right) {}_{103}^{257}\text{Lr} 0.65 s \left(\alpha \right)
{}_{\phantom{\rule{0.5em}{0ex}}94}^{241}\text{Pu} 14.4 y \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}{\beta }^{\text{−}}\right) {}_{105}^{260}\text{Ha} 1.5 s \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}S.F.\right)
{}_{\phantom{\rule{0.5em}{0ex}}95}^{241}\text{Am} 432.2 y \left(\alpha \right) {}_{106}^{263}\text{Sg} 0.8 s \left(\alpha \phantom{\rule{0.2em}{0ex}}\text{or}\phantom{\rule{0.2em}{0ex}}S.F.\right)

Footnotes

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

License

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Appendix M: Half-Lives for Several Radioactive Isotopes Copyright © by J. Hollett; D. Latimer; and D. Vanderwel is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

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