Appendix G Half-Lives

Douglas College Physics Department; OpenStax

Appendix G Half-Lives

This was originally from the 1st Canadian Edition of College Chemistry which is also based on Open Stax College Chemistry

Please note that y = years, d = days, h = hours, m = minutes and s = seconds, E.C. = electron capture, S.F. = spontaneous fission

Half-Lives for Several Radioactive Isotopes
Isotope	Half-Life	Type of Emission	Isotope	Half-Life	Type of Emission
$_6^{14}\text{C}$	5730 y	β-	$_{83}^{210}\text{Bi}$	5.01 d	β-
$_7^{13}\text{N}$	9.97 m	β+	$_{83}^{212}\text{Bi}$	60.55 m	α or β-
$_9^{15}\text{F}$	4.1 × 10⁻²² s	$(p)$	$_{84}^{210}\text{Po}$	138.4 d	$({\alpha})$
$_{11}^{24}\text{Na}$	15.00 h	β-	$_{84}^{212}\text{Po}$	3 × 10⁻⁷ s	α
$_{15}^{32}\text{P}$	14.29 d	β-	$_{84}^{216}\text{Po}$	0.15 s	α
$_{19}^{40}\text{K}$	1.27 × 10⁹ y	$({\beta}\;\text{or}\;E.C.)$	$_{84}^{218}\text{Po}$	3.05 m	α
$_{26}^{49}\text{Fe}$	0.08 s	$({\beta}+)$	$_{85}^{215}\text{At}$	1.0 × 10⁻⁴ s	α
$_{26}^{60}\text{Fe}$	2.6 × 10⁶ y	β-	$_{85}^{218}\text{At}$	1.6 s	α
$_{27}^{60}\text{Co}$	5.27 y	β-	$_{86}^{220}\text{Rn}$	55.6 s	α
$_{37}^{87}\text{Rb}$	4.7 × 10¹⁰ y	β-	$_{86}^{222}\text{Rn}$	3.82 d	α
$_{38}^{90}\text{Sr}$	29 y	β-	$_{88}^{224}\text{Ra}$	3.66 d	α
$_{49}^{115}\text{In}$	5.1 × 10¹⁵ y	β-	$_{88}^{226}\text{Ra}$	1600 y	α
$_{53}^{131}\text{I}$	8.040 d	β-	$_{88}^{228}\text{Ra}$	5.75 y	β-
$_{58}^{142}\text{Ce}$	5 × 10¹⁵ y	α	$_{89}^{228}\text{Ac}$	6.13 h	β-
$_{81}^{208}\text{Tl}$	3.07 m	β-	$_{90}^{228}\text{Th}$	1.913 y	α
$_{82}^{210}\text{Pb}$	22.3 y	β-	$_{90}^{232}\text{Th}$	1.4 × 10¹⁰ y	$({\alpha})$
$_{82}^{212}\text{Pb}$	10.6 h	β-	$_{90}^{233}\text{Th}$	22 m	β-
$_{82}^{214}\text{Pb}$	26.8 m	β-	$_{90}^{234}\text{Th}$	24.10 d24.10 d	β-
$_{83}^{206}\text{Bi}$	6.243 d	$(E.C.)$	$_{91}^{233}\text{Pa}$	27 d	β-
$_{92}^{233}\text{U}$	1.59 × 10⁵ y	$({\alpha})$	$_{96}^{242}\text{Cm}$	162.8 d	$({\alpha})$
$_{92}^{234}\text{U}$	2.45 × 10⁵ y	$({\alpha})$	$_{97}^{243}\text{Bk}$	4.5 h	$({\alpha}\;\text{or}\;E.C.)$
$_{92}^{235}\text{U}$	7.03 × 10⁸ y	α	$_{99}^{253}\text{Es}$	20.47 d	$({\alpha})$
$_{92}^{238}\text{U}$	4.47 × 10⁹ y	α	$_{100}^{254}\text{Fm}$	3.24 h	$({\alpha}\;\text{or}\;S.F.)$
$_{92}^{239}\text{U}$	23.54 m	β-	$_{100}^{255}\text{Fm}$	20.1 h	α
$_{93}^{239}\text{Np}$	2.3 d	β-	$_{101}^{256}\text{Md}$	76 m	$({\alpha}\;\text{or}\;E.C.)$
$_{94}^{239}\text{Pu}$	2.407 × 10⁴ y	α	$_{102}^{254}\text{No}$	55 s	α
$_{94}^{239}\text{Pu}$	6.54 × 10³ y	α	$_{103}^{257}\text{Lr}$	0.65 s	α
$_{94}^{241}\text{Pu}$	14.4 y	$({\alpha}\;\text{or}\;{\beta}-)$	$_{105}^{260}\text{Ha}$	1.5 s	$({\alpha}\;\text{or}\;S.F.)$
$_{95}^{241}\text{Am}$	432.2 y	$({\alpha})$	$_{106}^{263}\text{Sg}$	0.8 s	$({\alpha}\;\text{or}\;S.F.)$

License

Icon for the Creative Commons Attribution 4.0 International License

License

Share This Book