Isotopes of Potassium (Z=19)
Click on an isotope to get more information about its decay
Isotope
 Halflife
 Spin
Parity
 Decay Mode(s) or
Abundance 
^{ 32}K
  

^{ 33}K
  

^{ 34}K
  

^{ 35}K
 190 ms  3/2+ 
%EC+%B+=100, %ECP=0.37 15

^{ 36}K
 342 ms  2+ 
%EC+%B+=100, %ECP=0.048 14, %ECA=0.0034 13

^{ 37}K
 1.226 s  3/2+ 
%EC+%B+=100

^{ 38}K
 7.636 m  3+ 
%EC+%B+=100

^{ 38m1}K
 923.9 ms  0+ 
%EC+%B+=100

^{ 39}K
 stable  3/2+ 
%Abundance=93.2581 44

^{ 40}K
 1.277e+9 y  4 
%Abundance=0.0117 1, %B=89.28 13, %EC+%B+=10.72 13

^{ 41}K
 stable  3/2+ 
%Abundance=6.7302 44

^{ 42}K
 12.360 h  2 
%B=100

^{ 43}K
 22.3 h  3/2+ 
%B=100

^{ 44}K
 22.13 m  2 
%B=100

^{ 45}K
 17.3 m  3/2+ 
%B=100

^{ 46}K
 105 s  (2) 
%B=100

^{ 47}K
 17.50 s  1/2+ 
%B=100

^{ 48}K
 6.8 s  (2) 
%B=100, %BN=1.14 15

^{ 49}K
 1.26 s  (3/2+) 
%B=100, %BN=86 9

^{ 50}K
 472 ms  (0,1,2) 
%B=100, %BN=29 3

^{ 51}K
 365 ms  (1/2+,3/2+) 
%B=100 , %BN=47 5

^{ 52}K
 105 ms  
%B=100, %BN=91 9

^{ 53}K
 30 ms  (3/2+) 
%B=100, %BN=85 15

^{ 54}K
 10 ms  
%B=100, %BN=?

^{ 55}K
  

Last update on
February 15, 2012