40K EC DECAY (1.248E+9 Y) 
Parent state: G.S.
Half life: 1.248E+9 Y(3)
Q(gs): 1504.40(6) keV
Branch ratio:     0.1072(11)
 image 

Beta+ ray: total intensity =9.33e-03
for absolute intensity multiply by 9.33
    Max.E(keV)    Avg.E(keV)    Intensity(rel)   Spin      4-
     482.4( -)   197.325(25)   0.00100(13)                 0+

EC: total intensity = 100.0

Gamma ray: for absolute intensity multiply by 9.33
   Energy(keV)    Intensity(rel)
  1460.820( 5)     10.66(13)
JUN CHEN, Nuclear Data Sheet 140, 1 (2017)

Please e-mail to jhchang@kaeri.re.kr for any comment. Thank you.