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Decay modes are $\alpha $ , ${\beta}^{-}$ , ${\beta}^{+}$ , electron capture (EC) and isomeric transition (IT). EC results in the same daughter nucleus as would ${\beta}^{+}$ decay. IT is a transition from a metastable excited state. Energies for ${\beta}^{\pm}$ decays are the maxima; average energies are roughly one-half the maxima.
Isotope | t _{1/2} | DecayMode(s) | Energy(MeV) | Percent | $\gamma $ -Ray Energy(MeV) | Percent | |
---|---|---|---|---|---|---|---|
${\text{}}^{3}\text{H}$ | 12.33 y | ${\beta}^{-}$ | 0.0186 | 100% | |||
${\text{}}^{14}\text{C}$ | 5730 y | ${\beta}^{-}$ | 0.156 | 100% | |||
${\text{}}^{13}\text{N}$ | 9.96 min | ${\beta}^{+}$ | 1.20 | 100% | |||
${\text{}}^{22}\text{Na}$ | 2.602 y | ${\beta}^{+}$ | 0.55 | 90% | $\gamma $ | 1.27 | 100% |
${\text{}}^{32}\text{P}$ | 14.28 d | ${\beta}^{-}$ | 1.71 | 100% | |||
${\text{}}^{35}\text{S}$ | 87.4 d | ${\beta}^{-}$ | 0.167 | 100% | |||
${\text{}}^{36}\text{Cl}$ | $3\text{.}\text{00}\times {\text{10}}^{5}\text{y}$ | ${\beta}^{-}$ | 0.710 | 100% | |||
${\text{}}^{40}\text{K}$ | $1\text{.}\text{28}\times {\text{10}}^{9}\text{y}$ | ${\beta}^{-}$ | 1.31 | 89% | |||
${\text{}}^{43}\text{K}$ | 22.3 h | ${\beta}^{-}$ | 0.827 | 87% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.373 | 87% |
0.618 | 87% | ||||||
${\text{}}^{45}\text{Ca}$ | 165 d | ${\beta}^{-}$ | 0.257 | 100% | |||
${\text{}}^{51}\text{Cr}$ | 27.70 d | EC | $\gamma $ | 0.320 | 10% | ||
${\text{}}^{52}\text{Mn}$ | 5.59d | ${\beta}^{+}$ | 3.69 | 28% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 1.33 | 28% |
1.43 | 28% | ||||||
${\text{}}^{52}\text{Fe}$ | 8.27 h | ${\beta}^{+}$ | 1.80 | 43% | 0.169 | 43% | |
0.378 | 43% | ||||||
${\text{}}^{59}\text{Fe}$ | 44.6 d | ${\beta}^{-}\text{s}$ | 0.273 | 45% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 1.10 | 57% |
0.466 | 55% | 1.29 | 43% | ||||
${\text{}}^{60}\text{Co}$ | 5.271 y | ${\beta}^{-}$ | 0.318 | 100% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 1.17 | 100% |
1.33 | 100% | ||||||
${\text{}}^{65}\text{Zn}$ | 244.1 d | EC | $\gamma $ | 1.12 | 51% | ||
${\text{}}^{67}\text{Ga}$ | 78.3 h | EC | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.0933 | 70% | ||
0.185 | 35% | ||||||
0.300 | 19% | ||||||
others | |||||||
${\text{}}^{75}\text{Se}$ | 118.5 d | EC | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.121 | 20% | ||
0.136 | 65% | ||||||
0.265 | 68% | ||||||
0.280 | 20% | ||||||
others | |||||||
${\text{}}^{86}\text{Rb}$ | 18.8 d | ${\beta}^{-}\text{s}$ | 0.69 | 9% | $\gamma $ | 1.08 | 9% |
1.77 | 91% | ||||||
${\text{}}^{85}\text{Sr}$ | 64.8 d | EC | $\gamma $ | 0.514 | 100% | ||
${\text{}}^{90}\text{Sr}$ | 28.8 y | ${\beta}^{-}$ | 0.546 | 100% | |||
${\text{}}^{90}\text{Y}$ | 64.1 h | ${\beta}^{-}$ | 2.28 | 100% | |||
${\text{}}^{\mathrm{99m}}\text{Tc}$ | 6.02 h | IT | $\gamma $ | 0.142 | 100% | ||
${\text{}}^{\mathrm{113m}}\text{In}$ | 99.5 min | IT | $\gamma $ | 0.392 | 100% | ||
${\text{}}^{123}\text{I}$ | 13.0 h | EC | $\gamma $ | 0.159 | $\text{\u2248100\%}\text{}$ | ||
${\text{}}^{131}\text{I}$ | 8.040 d | ${\beta}^{-}\text{s}$ | 0.248 | 7% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.364 | 85% |
0.607 | 93% | others | |||||
others | |||||||
${\text{}}^{129}\text{Cs}$ | 32.3 h | EC | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.0400 | 35% | ||
0.372 | 32% | ||||||
0.411 | 25% | ||||||
others | |||||||
${\text{}}^{137}\text{Cs}$ | 30.17 y | ${\beta}^{-}\text{s}$ | 0.511 | 95% | $\gamma $ | 0.662 | 95% |
1.17 | 5% | ||||||
${\text{}}^{140}\text{Ba}$ | 12.79 d | ${\beta}^{-}$ | 1.035 | $\text{\u2248100\%}\text{}$ | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.030 | 25% |
0.044 | 65% | ||||||
0.537 | 24% | ||||||
others | |||||||
${\text{}}^{198}\text{Au}$ | 2.696 d | ${\beta}^{-}$ | 1.161 | $\text{\u2248100\%}\text{}$ | $\gamma $ | 0.412 | $\text{\u2248100\%}\text{}$ |
${\text{}}^{197}\text{Hg}$ | 64.1 h | EC | $\gamma $ | 0.0733 | 100% | ||
${\text{}}^{210}\text{Po}$ | 138.38 d | $\alpha $ | 5.41 | 100% | |||
${\text{}}^{226}\text{Ra}$ | $1\text{.}\text{60}\times {\text{10}}^{3}\text{y}$ | $\alpha \text{s}$ | 4.68 | 5% | $\gamma $ | 0.186 | 100% |
4.87 | 95% | ||||||
${\text{}}^{235}\text{U}$ | $7\text{.}\text{038}\times {\text{10}}^{8}\text{y}$ | $\alpha $ | 4.68 | $\text{\u2248100\%}\text{}$ | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | numerous | <0.400% |
${\text{}}^{238}\text{U}$ | $4\text{.}\text{468}\times {\text{10}}^{9}\text{y}$ | $\alpha \text{s}$ | 4.22 | 23% | $\gamma $ | 0.050 | 23% |
4.27 | 77% | ||||||
${\text{}}^{237}\text{Np}$ | $2\text{.}\text{14}\times {\text{10}}^{6}\text{y}$ | $\alpha \text{s}$ | numerous | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | numerous | <0.250% | |
4.96 (max.) | |||||||
${\text{}}^{239}\text{Pu}$ | $2\text{.}\text{41}\times {\text{10}}^{4}\text{y}$ | $\alpha \text{s}$ | 5.19 | 11% | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | $7\text{.}5\times {\text{10}}^{-5}$ | 73% |
5.23 | 15% | 0.013 | 15% | ||||
5.24 | 73% | 0.052 | 10% | ||||
others | |||||||
${\text{}}^{243}\text{Am}$ | $7\text{.}\text{37}\times {\text{10}}^{3}\text{y}$ | $\alpha \text{s}$ | Max. 5.44 | $\gamma \phantom{\rule{0.10em}{0ex}}\text{s}$ | 0.075 | ||
5.37 | 88% | others | |||||
5.32 | 11% | ||||||
others |
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