Results:3 different decay possibilities were found


Dataset #1:

Author: S. Ohya   Citation:Nuclear Data Sheets 111, 1619 (2010)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
121
50
Sn
 0.0    3/2+   27.03 h 4    β-: 100  390.6 21   
121
51
Sb
 

Beta-:

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




   115.82 71    390.6 21    100 %  0.1158

Mean beta- energy: 115.82 keV , total beta- intensity: 100 % , mean beta- dose: 0.116 MeV/Bq-s

Dataset #2:

Author: S. Ohya   Citation:Nuclear Data Sheets 111, 1619 (2010)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
121
50
Sn
 6.308    11/2-   43.9 y 5    β-   390.6 21   
121
51
Sb
 

Beta-:

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




   122.44 74    359.8 21     22.4 %  0.0274

Mean beta- energy: 122.44 keV , total beta- intensity: 22.4 % , mean beta- dose: 0.0274 MeV/Bq-s

Electrons:

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



Auger L     3.07      16.81 % 8   5.16E-4 3 
CE K     6.66 4       17.3 %  0.001152
Auger K    21.8       2.28 % 7   4.98E-4 15 
CE L    32.45 4        2.27 %  7.36E-4
CE M    36.21 4        0.450 %  1.63E-4
CE N    37.00 4        0.0864 %  3.20E-5
CE O    37.15 4        0.00847 %  3.15E-6

Gamma and X-ray radiation:

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



XR l     3.6       1.45 % 6   5.24E-5 20 
XR kα2    26.111       4.31 % 10   0.00112 3 
XR kα1    26.359       7.96 % 17   0.00210 5 
XR kβ3    29.679       0.727 % 16   2.16E-4 5 
XR kβ1    29.726       1.40 % 3   4.16E-4 9 
XR kβ2    30.393       0.394 % 9   1.20E-4 3 
    37.15 4        1.85 %  6.9E-4

Dataset #3:

Author: S. Ohya   Citation:Nuclear Data Sheets 111, 1619 (2010)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
121
50
Sn
 6.298    11/2-   43.9 y 5    IT       
121
50
Sn
 

Electrons:

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



CE L     1.83 8       50 %  9.1E-4
Auger L     2.95      45.99 % 12   0.001357 4 
CE M     5.41 8       23 %  0.0013
CE N     6.15 8        4.2 %  2.6E-4
CE O     6.29 8        0.012 %  7.8E-7

Gamma and X-ray radiation:

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



XR l     3.44       3.68 % 12   1.26E-4 4 
     6.29 8        8.9E-10 %  5.6E-14