## Half-Lives for Several Radioactive Isotopes

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