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
  

Last update on
February 15, 2012