Isotopes of Praseodymium (Z=59)
Click on an isotope to get more information about its decay
Isotope

Halflife

Spin
Parity

Decay Mode(s) or
Abundance 
^{ 121}Pr
 1.4 s 

%EC+%B+=100, %ECP=?

^{ 122}Pr
 


^{ 123}Pr
 


^{ 124}Pr
 1.2 s 

%EC+%B+=100, %ECP=?

^{ 125}Pr
 3.3 s 

%EC+%B+=100

^{ 126}Pr
 3.14 s  (3,4,5)

%EC+%B+=100, %ECP=?

^{ 127}Pr
 4.2 s  (11/2)

%EC+%B+=100

^{ 128}Pr
 3.1 s  4,5,6

%EC+%B+=100, %ECP=?

^{ 129}Pr
 30 s  (3/2+)

%EC+%B+=100

^{ 130}Pr
 40.0 s 

%EC+%B+=100

^{ 131}Pr
 1.53 m  (3/2+)

%EC+%B+=100

^{131m1}Pr
 5.7 s  (11/2)

%IT=95 , %EC+%B+=5

^{ 132}Pr
 1.6 m 

%EC+%B+=100

^{ 133}Pr
 6.5 m  (3/2+)

%EC+%B+=100

^{ 134}Pr
 17 m  2

%EC+%B+=100

^{134m1}Pr
 11 m  (5)

%EC+%B+=100

^{ 135}Pr
 24 m  3/2(+)

%EC+%B+=100

^{ 136}Pr
 13.1 m  2+

%EC+%B+=100

^{ 137}Pr
 1.28 h  5/2+

%EC+%B+=100

^{ 138}Pr
 1.45 m  1+

%EC+%B+=100

^{138m1}Pr
 2.12 h  7

%EC+%B+=100

^{ 139}Pr
 4.41 h  5/2+

%EC+%B+=100

^{ 140}Pr
 3.39 m  1+

%EC+B+=100

^{ 141}Pr
 stable  5/2+

%Abundance=100

^{ 142}Pr
 19.12 h  2

%B=99.9836 8, %EC=0.0164 8

^{142m1}Pr
 14.6 m  5

%IT=100

^{ 143}Pr
 13.57 d  7/2+

%B=100

^{ 144}Pr
 17.28 m  0

%B=100

^{144m1}Pr
 7.2 m  3

%IT=99.93, %B=0.07

^{ 145}Pr
 5.984 h  7/2+

%B=100

^{ 146}Pr
 24.15 m  (2)

%B=100

^{ 147}Pr
 13.4 m  (3/2+)

%B=100

^{ 148}Pr
 2.27 m  1

%B=100

^{148m1}Pr
 2.0 m  (4)

%B=100

^{ 149}Pr
 2.26 m  (5/2+)

%B=100

^{ 150}Pr
 6.19 s  (1)

%B=100

^{ 151}Pr
 18.90 s  (3/2)

%B=100

^{ 152}Pr
 3.63 s  (4)

%B=100

^{ 153}Pr
 4.28 s 

%B=100

^{ 154}Pr
 2.3 s  (3+,2+)

%B=100

^{ 155}Pr
 


^{ 156}Pr
 


^{ 157}Pr
 


^{ 158}Pr
 


^{ 159}Pr
 


Isotope Explorer Nuclear Structure and Decay Data
8th Edition of the Table of Isotopes
Isotopes Project Home Page
Lawrence Berkeley National Laboratory
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