Half-Lives for Several Radioactive Isotopes

Isotope	Half-Life^[1]	Type of Emission^[2]	Isotope	Half-Life^[3]	Type of Emission^[4]
${}_{6}^{14}\text{C}$	$5730\text{y}$	$\left({\beta }^{-}\right)$	${}_{83}^{210}\text{Bi}$	$5.01\text{ d}$	$\left({\beta }^{-}\right)$
${}_{7}^{13}\text{N}$	$9.97\text{ m}$	$\left({\beta }^{+}\right)$	${}_{83}^{212}\text{Bi}$	$60.55\text{ m}$	$\left(\alpha \text{ or }{\beta }^{-}\right)$
${}_{9}^{15}\text{F}$	$4.1 \times {10}^{-22}\text{ s}$	$\left(p\right)$	${}_{84}^{210}\text{Po}$	$138.4\text{ d}$	$\left(\alpha \right)$
${}_{11}^{24}\text{Na}$	$15.00\text{ h}$	$\left({\beta }^{-}\right)$	${}_{84}^{212}\text{Po}$	$3 \times {10}^{-7}\text{ s}$	$\left(\alpha \right)$
${}_{15}^{32}\text{P}$	$14.29\text{ d}$	$\left({\beta }^{-}\right)$	${}_{84}^{216}\text{Po}$	$0.15\text{ s}$	$\left(\alpha \right)$
${}_{19}^{40}\text{K}$	$1.27 \times {10}^{9}\text{ y}$	$\left(\beta \text{ or }E.C.\right)$	${}_{84}^{218}\text{Po}$	$3.05\text{ m}$	$\left(\alpha \right)$
${}_{26}^{49}\text{Fe}$	$0.08\text{ s}$	$\left({\beta }^{+}\right)$	${}_{85}^{215}\text{At}$	$1.0 \times {10}^{-4}\text{ s}$	$\left(\alpha \right)$
${}_{26}^{60}\text{Fe}$	$2.6 \times {10}^{6}\text{ y}$	$\left({\beta }^{-}\right)$	${}_{85}^{218}\text{At}$	$1.6\text{ s}$	$\left(\alpha \right)$
${}_{27}^{60}\text{Co}$	$5.27\text{ y}$	$\left({\beta }^{-}\right)$	${}_{86}^{220}\text{Rn}$	$55.6\text{ s}$	$\left(\alpha \right)$
${}_{37}^{87}\text{Rb}$	$4.7 \times {10}^{10}\text{ y}$	$\left({\beta }^{-}\right)$	${}_{86}^{222}\text{Rn}$	$3.82\text{ d}$	$\left(\alpha \right)$
${}_{38}^{90}\text{Sr}$	$29\text{ y}$	$\left({\beta }^{-}\right)$	${}_{88}^{224}\text{Ra}$	$3.66\text{ d}$	$\left(\alpha \right)$
${}_{49}^{115}\text{In}$	$5.1 \times {10}^{15}\text{ y}$	$\left({\beta }^{-}\right)$	${}_{88}^{226}\text{Ra}$	$1600\text{ y}$	$\left(\alpha \right)$
${}_{53}^{131}\text{I}$	$8.040\text{ d}$	$\left({\beta }^{-}\right)$	${}_{88}^{228}\text{Ra}$	$5.75\text{ y}$	$\left({\beta }^{-}\right)$
${}_{58}^{142}\text{Ce}$	$5 \times {10}^{15}\text{ y}$	$\left(\alpha \right)$	${}_{89}^{228}\text{Ac}$	$6.13\text{ h}$	$\left({\beta }^{-}\right)$
${}_{81}^{208}\text{Tl}$	$3.07\text{ m}$	$\left({\beta }^{-}\right)$	${}_{90}^{228}\text{Th}$	$1.913\text{ y}$	$\left(\alpha \right)$
${}_{82}^{210}\text{Pb}$	$22.3\text{ y}$	$\left({\beta }^{-}\right)$	${}_{90}^{232}\text{Th}$	$1.4 \times {10}^{10}\text{y}$	$\left(\alpha \right)$
${}_{82}^{212}\text{Pb}$	$10.6\text{ h}$	$\left({\beta }^{-}\right)$	${}_{90}^{233}\text{Th}$	$22\text{ m}$	$\left({\beta }^{-}\right)$
${}_{82}^{214}\text{Pb}$	$26.8\text{ m}$	$\left({\beta }^{-}\right)$	${}_{90}^{234}\text{Th}$	$24.10\text{ d}$	$\left({\beta }^{-}\right)$
${}_{83}^{206}\text{Bi}$	$6.243\text{ d}$	$\left(E.C.\right)$	${}_{91}^{233}\text{Pa}$	$27\text{ d}$	$\left({\beta }^{-}\right)$
${}_{92}^{233}\text{U}$	$1.59 \times {10}^{5}\text{y }$	$\left(\alpha \right)$	${}_{96}^{242}\text{Cm}$	$162.8\text{ d}$	$\left(\alpha \right)$
${}_{92}^{234}\text{U}$	$2.45 \times {10}^{5}\text{ y}$	$\left(\alpha \right)$	${}_{97}^{243}\text{Bk}$	$4.5\text{ h}$	$\left(\alpha \text{ or }E.C.\right)$
${}_{92}^{235}\text{U}$	$7.03 \times {10}^{8}\text{ y}$	$\left(\alpha \right)$	${}_{99}^{253}\text{Es}$	$20.7\text{ d}$	$\left(\alpha \right)$
${}_{92}^{238}\text{U}$	$4.47 \times {10}^{9}\text{ y}$	$\left(\alpha \right)$	${}_{100}^{254}\text{Fm}$	$3.24\text{ h}$	$\left(\alpha \text{ or }S.F.\right)$
${}_{92}^{239}\text{U}$	$23.54\text{ m}$	$\left({\beta }^{-}\right)$	${}_{100}^{255}\text{Fm}$	$20.1\text{ h}$	$\left(\alpha \right)$
${}_{93}^{239}\text{Np}$	$2.3\text{ d}$	$\left({\beta }^{-}\right)$	${}_{101}^{256}\text{Md}$	$76\text{ m}$	$\left(\alpha \text{ or }E.C.\right)$
${}_{94}^{239}\text{Pu}$	$2.407 \times {10}^{4}\text{ y}$	$\left(\alpha \right)$	${}_{102}^{254}\text{No}$	$55\text{ s}$	$\left(\alpha \right)$
${}_{94}^{240}\text{Pu}$	$6.54 \times {10}^{3}\text{ y}$	$\left(\alpha \right)$	${}_{103}^{257}\text{Lr}$	$0.65\text{ s}$	$\left(\alpha \right)$
${}_{94}^{241}\text{Pu}$	$14.4\text{ y}$	$\left(\alpha \text{ or }{\beta }^{-}\right)$	${}_{105}^{260}\text{Ha}$	$1.5\text{ s}$	$\left(\alpha \text{ or }S.F.\right)$
${}_{95}^{241}\text{Am}$	$432.2\text{ y}$	$\left(\alpha \right)$	${}_{106}^{263}\text{Sg}$	$0.8\text{ s}$	$\left(\alpha \text{ or }S.F.\right)$

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

Appendices

Half-Lives for Several Radioactive Isotopes

Candela Citations