Results:2 different decay possibilities were found


Dataset #1:

Author: Coral M. Baglin   Citation:Nuclear Data Sheets 114, 1293 (2013)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
91
39
Y
 555.585    9/2+   49.71 m 4    IT: 100      
91
39
Y
 

Electrons:

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



Auger L     1.91       5.126 % 17   9.79E-5 3 
Auger K    12.7       1.233 % 17   1.566E-4 22 
CE K   538.53 5        4.34 %  0.0234
CE L   553.20 5        0.585 %  0.00324
CE M   555.18 5        0.1016 %  5.64E-4
CE N   555.52 5        0.01345 %  7.47E-5

Gamma and X-ray radiation:

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



XR l     1.92       0.153 % 4   2.93E-6 7 
XR kα2    14.883       0.91 % 3   1.35E-4 5 
XR kα1    14.958       1.74 % 6   2.60E-4 9 
XR kβ3    16.726       0.132 % 5   2.21E-5 8 
XR kβ1    16.738       0.256 % 9   4.28E-5 15 
XR kβ2    17.013       0.0491 % 17   8.3E-6 3 
   555.57 5       95.0 %  0.5278

Dataset #2:

Author: Coral M. Baglin   Citation:Nuclear Data Sheets 114, 1293 (2013)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
91
39
Y
 0.0    1/2-   58.51 d 6    β-   1544.3 18   
91
40
Zr
 

Beta-:

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




   100.34 61    339.5 18      0.26 % 4   2.6E-4 4 
   604.31 79   1544.3 18     99.74 % 4   0.6027 8 

Mean beta- energy: 603.0 keV 9, total beta- intensity: 100.00 % 6, mean beta- dose: 0.6030 MeV/Bq-s 10

Electrons:

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



Auger L     2.02       1.157E-4 % 4   2.337E-9 8 
Auger K    13.4       2.71E-5 % 4   3.63E-9 5 
CE K  1186.80 13        1.019E-4 %  1.210E-6
CE L  1202.27 13        1.123E-5 %  1.350E-7
CE M  1204.37 13        1.94E-6 %  2.34E-8
CE N  1204.75 13        2.76E-7 %  3.32E-9

Gamma and X-ray radiation:

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



XR l     2.04       3.79E-6 % 10   7.73E-11 20 
XR kα2    15.691       2.18E-5 % 6   3.42E-9 10 
XR kα1    15.775       4.18E-5 % 12   6.59E-9 19 
XR kβ3    17.653       3.23E-6 % 9   5.70E-10 16 
XR kβ1    17.667       6.27E-6 % 17   1.11E-9 3 
XR kβ2    17.969       1.27E-6 % 4   2.29E-10 7 
  1204.80 13        0.26 %  0.0031