Appendix M  Half-Lives for Several Radioactive Isotopes

 

Table M1  Half-Lives for Several Radioactive Isotopes

Isotope

Half-Life [1]

Type of Emission [2]

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Isotope

Half-Life [1]

Type of Emission [2]
​ 14C

5730 y
β−
​224Ra

3.66 d
(α)
​ 13N

9.97 m
β+
​226Ra

1600 y
(α)
​ 15F

4.1 × 10−22 s
p
​228Ra

5.75 y
β−
​24Na

15.00 h
β−
​228Ac

6.13 h
β−
​32P

14.29 d
β−
​228Th

1.913 y
(α)
​40K

1.27 × 109 y
β or E.C.
​232Th

1.4 × 1010 y
(α)
​49Fe

0.08 s
β+
​233Th

22 m
β−
​60Fe

2.6 × 106 y
β−
​234Th
24.10d
β−
​60Co

5.27 y
β−
​233Pa

27 d
β−
​87Rb

4.7 × 1010 y
β−
​233U

1.59 × 105 y
(α)
​90Sr

29 y
β−
234U

2.45 × 105 y
(α)
​ 115In

5.1 × 1015 y
β−
​235U

7.03 × 108 y
(α)
​131I

8.040 d
β−
​238U

4.47 × 109 y
(α)
​142Ce

5 × 1015 y
(α)
​239U

23.54 m
β−
​ 208Tl

3.07 m
β−
239Np

2.3 d
β−
​210Pb

22.3 y
β−
​239Pu

2.407 × 104 y
(α)
​212Pb

10.6 h
β−
239Pu

6.54 × 103 y
(α)
​ 214Pb

26.8 m
β−
​241Pu

14.4 y
(α or β−)
206Bi

6.243 d
E.C.
​241Am

432.2 y
(α)
210Bi

5.01 d
β−
​242Cm

162.8 d
(α)
212Bi

60.55 m
(α or β−)
​243Bk

4.5 h
(α or E.C.)
210Po

138.4 d
(α)
​253Es

20.47 d
(α)
​212Po

3 ×10−7 s
(α)
​254Fm

3.24 h
(α or S.F.)
​216Po

0.15 s
(α)
​255Fm

20.1 h
(α)
​218Po

3.05 m
(α)
​256Md

76 m
(α or E.C.)
​215At

1.0 × 10−4 s
(α)
​254No

55 s
(α)
​218At

1.6 s
(α)
​257Lr

0.65 s
(α)
​220Rn

55.6 s
(α)
​260Ha

1.5 s
(α or S.F.)
​222Rn

3.82 d
(α)
​263Sg

0.8 s
(α or S.F.)

1  y = years, d = days, h = hours, m = minutes, s = seconds

2  E.C. = electron capture, S.F. = Spontaneous fission

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Appendix M Half-Lives for Several Radioactive Isotopes Copyright © by Nicole Bouvier-Brown; Saori Shiraki; J. Ryan Hunt; and Emily Jarvis. All Rights Reserved.

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