Results:2 different decay possibilities were found


Dataset #1:

Authors: S. K. Basu, A. A. Sonzogni   Citation:Nuclear Data Sheets 114, 435 (2013)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
154
68
Er
 0.0    0+   3.73 m 9    α   4280   
150
66
Dy
 

Alphas:

Energy
(keV)
Intensity
(%)
Dose
( MeV/Bq-s )



  4168 3       0.47 %  0.020

Dataset #2:

Author: N. Nica   Citation:Nuclear Data Sheets 200, 2 (2025)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
154
68
Er
 0    0+   3.73 m 9    ε: 99.53 13  2034   
154
67
Ho
 

Beta+:

Energy
(keV)
End-point energy
(keV)
Intensity
(%)
Dose
( MeV/Bq-s )




   452 5    985 9       2.77 % 10   0.0125 5 

Mean beta+ energy: 452 keV 24, total beta+ intensity: 2.77 % 10, mean beta+ dose: 0.0125 MeV/Bq-s 8

Electrons:

Energy
(keV)
Intensity
(%)
Dose
( MeV/Bq-s )



Auger L     5.33      64.0 % 7   0.00341 4 
Auger K    38.4       4.9 % 3   0.00187 12 

Gamma and X-ray radiation:

Energy
(keV)
Intensity
(%)
Dose
( MeV/Bq-s )



XR l     6.72      16.6 % 6   0.00112 4 
XR kα2    46.7      21.8 % 5   0.01017 23 
XR kα1    47.547      38.5 % 8   0.0183 4 
XR kβ3    53.695       4.05 % 8   0.00217 4 
XR kβ1    53.877       7.84 % 16   0.00422 9 
XR kβ2    55.293       2.62 % 6   0.00145 3 
Annihil.   511.0       5.54 % 20