Results:2 different decay possibilities were found


Dataset #1:

Author: C. D. Nesaraja   Citation:Nuclear Data Sheets 125, 395 (2015)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
251
99
Es
 0.0    3/2-   33 h 1    α   6598   
247
97
Bk
 

Alphas:

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



  6410 3       0.017 % 7   0.0011 5 
  6422 3       0.015 % 7   1.0E-3 4 
  6452 3       0.017 % 7   0.0011 5 
  6462 3       0.047 % 19   0.0030 13 
  6492 3       0.41 % 16   0.026 11 

Dataset #2:

Author: C. Morse   Citation:Nuclear Data Sheets 189, 111 (2023)

Parent
Nucleus
Parent
E(level)
Parent
Parent
T1/2
Decay Mode GS-GS Q-value
(keV)
Daughter
Nucleus
Decay
Scheme
 
ENSDF
file
 
251
99
Es
 0    3/2-   33 h 1    ε: 99.5 1  377   
251
98
Cf
 

Electrons:

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



Auger L    11.2      40 % 3   0.0045 4 
CE K    17.83 4        4.7 % 4   8.3E-4 7 
CE K    28.83 4        0.41 % 5   1.17E-4 15 
CE K    42.63 4        6.5 % 6   0.00278 24 
CE L    45.48 3        0.69 % 7   3.2E-4 3 
CE L    55.18 3        0.211 % 21   1.16E-4 12 
CE M    64.745 18        0.198 % 20   1.28E-4 13 
CE N    69.690 20        0.056 % 6   3.9E-5 4 
CE O    71.317       0.0137 % 14   9.8E-6 10 
CE P    71.473       0.00218 % 22   1.56E-6 16 
CE M    74.445 18        0.060 % 6   4.5E-5 5 
CE N    79.390 20        0.0169 % 17   1.34E-5 14 
CE O    81.0171       0.0042 % 4   3.4E-6 3 
CE P    81.173       6.7E-4 % 7   5.4E-7 5 
Auger K    83.3       1.9 % 3   0.00154 25 
CE L   103.78 3        2.52 % 21   0.00261 22 
CE M   123.045 18        0.62 % 5   7.6E-4 6 
CE L   126.78 3        0.99 % 9   0.00126 11 
CE N   127.990 20        0.171 % 14   2.19E-4 19 
CE O   129.617       0.044 % 4   5.8E-5 5 
CE P   129.773       0.0086 % 7   1.11E-5 9 
CE L   137.78 3        0.086 % 11   1.19E-4 15 
CE M   146.045 18        0.244 % 21   3.6E-4 3 
CE N   150.990 20        0.068 % 6   1.02E-4 9 
CE L   151.58 3        1.58 % 14   0.00240 21 
CE O   152.617       0.0176 % 15   2.68E-5 23 
CE P   152.773       0.0034 % 3   5.2E-6 4 
CE M   157.045 18        0.021 % 3   3.3E-5 4 
CE N   161.990 20        0.0059 % 7   9.5E-6 12 
CE O   163.617       0.00152 % 19   2.5E-6 3 
CE P   163.773       2.9E-4 % 4   4.8E-7 6 
CE M   170.845 18        0.40 % 3   6.8E-4 6 
CE N   175.790 20        0.110 % 9   1.94E-4 17 
CE O   177.417       0.0285 % 24   5.0E-5 4 
CE P   177.573       0.0054 % 5   9.5E-6 8 

Gamma and X-ray radiation:

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



XR l    15.7      50 % 3   0.0078 5 
    71.5       0.0090 % 9   6.4E-6 6 
    81.2       0.0050 % 5   4.0E-6 4 
XR kα2   109.831      19.0 % 15   0.0209 16 
XR kα1   115.032      29.4 % 23   0.034 3 
XR kβ3   128.594       3.8 % 3   0.0049 4 
   129.8       0.84 % 7   0.00108 9 
XR kβ1   129.823       7.1 % 6   0.0092 7 
XR kβ2   133.483       2.82 % 22   0.0038 3 
   152.8       0.53 % 4   8.1E-4 7 
   163.8       0.056 % 7   9.1E-5 11 
   177.6       1.29 % 11   0.00230 19 

Gamma Coincidence Data:

For each gamma, the list of gammas in coincidence is given.
If experimentally known, an estimate of the average time interval (in seconds) between both gammas is given.

E(γ)Coincidence
    23.024.8, 129.8, 129.8, 163.7, 163.8
    23.024.8
    24.823.0, 23.0, 71.5, 71.5, 81.2, 81.2, 129.8, 129.8, 152.8, 152.8, 163.7, 163.8, 186.8
    47.8129.8, 129.8, 163.7, 163.8
    71.524.8, 81.2
    71.524.8, 81.2
    81.224.8, 71.5, 71.5
    81.224.8
   129.823.0, 24.8, 47.8
   129.823.0, 24.8, 47.8
   152.824.8
   152.824.8
   163.723.0, 24.8, 47.8
   163.823.0, 24.8, 47.8
   186.824.8