ADOPTED LEVELS, GAMMAS for 157Gd

Author: N. Nica |  Citation: Nucl. Data Sheets 132, 1 (2016) |  Cutoff date: 4-Dec-2015 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-60.0 keV 3S(n)= 6359.88 keV 15S(p)= 8030 keV 3Q(α)= -688.7 keV 4
S(2n)= 14896.23 keV 15S(2p)= 15210.6 keV 3
Reference: 2017WA10

References:
  A  157Eu β- decay  B  157Gd IT decay (18.5 μs)
  C  157Tb ε decay  D  161Dy α decay:?
  E  155Gd(t,p)  F  156Gd(n,γ) E=TH
  G  156Gd(n,γ) E=resonance  H  156Gd(n,γ) E=2 KEV
  I  156Gd(n,γ) E=24 KEV  J  156Gd(d,p)
  K  157Gd(γ,γ’)  L  157Gd(n,n’γ)
  M  157Gd(d,d’)  N  158Gd(p,dγ)
  O  158Gd(d,t),(p,d),(3He,α)  P  Coulomb Excitation

General Comments:

Model and theoretical discussions of interest:

Occupation numbers of the 11/2[505] neutron state (1984Pe03).

Mixing of the n=4 and 6 Nilsson states (1971Ga34).

Wave functions, level energies, B(E2), and cross sections (1970Ka47,1971Ma41,1973Ga29,1975Hi01,1996Pr02).

Energy spacings in 3/2- band in terms of Coriolis mixing with 1/2- band (1974Jo06); other level energies (1994Pr04,1996Pr02).

γ branching (1979Ka11).

Moments (1970Va02,1973Ba85,1973Bu22,1973RaXR,1974Ba18).

Cluster decay probabilities (2003Gu13).

Isotope shifts (2011Ji11)

Scissors-mode strength (2013Kr11,2013Kr07).

Levels: Below 600 keV the band structure and band assignments in 157Gd are well established. Above this energy, the experimental data and the theoretical considerations indicate that the band structure is complex and the assignments are not unambiguous. In fact, above 600 keV, most Nilsson orbitals have been assigned to different sets of levels in different studies. Also, many levels have not been given band assignments. Even for the existing band assignments, the deviations between the observed and theoretical (d,p) and (d,t) cross sections suggest more complex Nilsson orbital mixtures or additional unresolved levels. See 1970Ka47 for theoretical cross sections with and without Coriolis coupling.

Levels: Accordong to 2003Bo25 for Jπ assignments from (n,n’γ) and (n,γ) reactions definite values instead of tentative were adopted for levels populated by primary γ rays decaying the 1/2+, S(n)+x resonance based on the following rather empirical arguments:

Levels: (i) primary transitions are of dipole type (quadrupole type or higher are extremely rare);

Levels: (ii) primary E1 transitions in heavy nuclei can be distinguish from M1 transitions (E1’s being on average stronger by a factor of seven than M1’s).










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0.0ABCDEFGHIJKLMNOP 3/2- STABLE      
     54.536 6 ABCDEFG   KLMNOP 5/2- 130 ps 8      54.548 8 
  100
M1+E2
      0.0
3/2-
     63.916 5 AB D FG IJKL NOP 5/2+ 0.46 µs 4       9.365 12 
    63.929 8 
    7.1 11 
  100 10 
E1
E1
     54.536
      0.0
5/2-
3/2-
    115.717 7 AB   FG   KL NOP 7/2+       51.834 14 
  100
M1+E2
     63.916
5/2+
    131.451 9 AB DEFG  JKLMNOP 7/2- 100 ps 10      67.3
    76.925 14 
   131.438 16 
    0.9 8 
  100 3 
   30 3 
E1
M1+E2
E2
     63.916
     54.536
      0.0
5/2+
5/2-
3/2-
    180.229 11 AB DEFG  J LMNOP 9/2+       64.4 2 
   116.314 28 
  100 50 
   30 8 
(M1+E2)

    115.717
     63.916
7/2+
5/2+
    226.983 19 AB DEFG  J LMNOP 9/2- 16.7 ps 15      95.7 2 
   112.8
   172.37 2 
  100 4 
    5.7 20 
   72 13 

E1
[E2]
    131.451
    115.717
     54.536
7/2-
7/2+
5/2-
    272.22 3      F   J L N P 11/2+       91.96 8 
   156.50 4 
  100 5 
   58 3 


    180.229
    115.717
9/2+
7/2+
    315 3 ?         J              
    347.05 6     E    J LMNOP 11/2- 12.2 ps 10     120.1 1 
   166.8
   215.6 1 
   75.9 18 
    9 3 
  100.0 18 

E1
[E2]
    226.983
    180.229
    131.451
9/2-
9/2+
7/2-
    361.04 9          J L NO  13/2+       88.8
   180.84 10 
 
  100


    272.22
    180.229
11/2+
9/2+
    372 3 ?              O         
    426.539 23  B         L NO  11/2- 18.5 µs 23 
% IT = 100
   199
   246.31 2 
   49 2 
  100 5 
[M1,E2]
[E1]
    226.983
    180.229
9/2-
9/2+
    434.426 6 A  DEFG  J LMNOP 5/2- < 0.1 ns    302.994 28 
   318.710 8 
   370.509 8 
   379.905 9 
   434.388 13 
    0.61 9 
   26.3 13 
  100 5 
    2.39 24 
    3.2 3 
[M1,E2]
E1
E1
[M1,E2]
[M1,E2]
    131.451
    115.717
     63.916
     54.536
      0.0
7/2-
7/2+
5/2+
5/2-
3/2-
    474.630 6 A  D FGHIJ LMNOP 3/2+ < 0.1 ns    358.931 15 
   410.723 9 
   420.090 9 
   474.625 11 
    1.72 17 
  100 5 
    5.3 4 
   14.4 7 
[E2]
M1+E2
[E1]
[E1]
    115.717
     63.916
     54.536
      0.0
7/2+
5/2+
5/2-
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    478.62 4            LMN P 13/2- 7.3 ps 6     116.6
   131.6 1 
   206.4
   251.63 3 
    0.6 3 
   40 4 
    9 3 
  100 4 
E1

E1
[E2]
    361.04
    347.05
    272.22
    226.983
13/2+
11/2-
11/2+
9/2-
    508.93 11            L  OP 15/2+      147.93 11 
   236.62 16 
   68 11 
  100 5 


    361.04
    272.22
13/2+
11/2+
    514.671 8 A  DEFG  J LMNOP 7/2-      334.441 10 
   383.17 3 
   398.953 9 
   450.761 10 
   517
   62 4 
    5.3 8 
  100 5 
   92 6 
 





    180.229
    131.451
    115.717
     63.916
      0.0
9/2+
7/2-
7/2+
5/2+
3/2-
    524.847 7 A    FG I  L N P 5/2+      344.61 6 
   393.408 20 
   409.135 10 
   460.923 9 
   470.389 26 
   524.835 18 
    1.3 3 
    4.6 5 
  100 5 
   36.2 25 
    7.4 7 
   11.3 11 






    180.229
    131.451
    115.717
     63.916
     54.536
      0.0
9/2+
7/2-
7/2+
5/2+
5/2-
3/2-
    566 1      F                  
    579.40 8            L N   (13/2-)      152.86 7 
  100

    426.539
11/2-
    607.589 15 A    FG    L     7/2(+)      380.38 6 
   427.355 15 
   491.89 3 
   543.93 6 
   553.02 7 
   20 3 
  100 10 
   57 8 
    7.5 8 
   17.3 10 





    226.983
    180.229
    115.717
     63.916
     54.536
9/2-
9/2+
7/2+
5/2+
5/2-
    612.1 5                P 17/2+      103.2
   251.4
 
 


    508.93
    361.04
15/2+
13/2+
    617.38 3          J L NO  9/2-      345.16 6 
   437.06 6 
   501.70 4 
   48 3 
   42.9 22 
  100 7 



    272.22
    180.229
    115.717
11/2+
9/2+
7/2+
    640.33 8     E      LM  P 15/2- 4.3 ps 3     131.3
   161.7 1 
   279.4
   293.3 1 
    0.45 15 
   36 6 
   14 3 
  100 6 
E1

E1
[E2]
    508.93
    478.62
    361.04
    347.05
15/2+
13/2-
13/2+
11/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    655.7 5         I               
    664.44 5          J L  O  9/2+      392.19 4 
   533.18 14 
   548.83 12 
  100 5 
   16 10 
   13.0 15 



    272.22
    131.451
    115.717
11/2+
7/2-
7/2+
    682.82 4      FG  J L NO  1/2+      208.20 4 
   619
   682.80 5 
  100 3 
 
   48 3 



    474.630
     63.916
      0.0
3/2+
5/2+
3/2-
    683.236 9 A    FGHI  L N   3/2+ < 0.3 ns    158.41 3 
   208.621 11 
   567.58 4 
   619.303 12 
   628.704 28 
   683.162 27 
    0.68 19 
    4.1 4 
    4.1 4 
  100 5 
    2.8 4 
    6.5 12 


[E2]


[E1]
    524.847
    474.630
    115.717
     63.916
     54.536
      0.0
5/2+
3/2+
7/2+
5/2+
5/2-
3/2-
    686.667 9 A    FG    L     5/2+,7/2+      161.820 13 
   212.050 25 
   252.3 2 
   506.43 3 
   555.23 12 
   570.937 13 
   622.751 13 
   632.23 5 
    5.4 11 
    3.9 6 
    2.8 14 
    5.2 8 
    2.2 4 
  100 5 
   62 4 
    3.0 6 








    524.847
    474.630
    434.426
    180.229
    131.451
    115.717
     63.916
     54.536
5/2+
3/2+
5/2-
9/2+
7/2-
7/2+
5/2+
5/2-
    701.39 4    DEFGHIJ LMNOP (1/2)-      268
   638?
   701.39 4 
   26 6 
   17 4 
  100 13 



    434.426
     63.916
      0.0
5/2-
5/2+
3/2-
    722.9 2 ?A           M OP      607.1 2 ?
   668.5 2 ?
  100 50 
   26 7 


    115.717
     54.536
7/2+
5/2-
    729.23 3 A    FGHI  L N   3/2-      613.73 14 ?
   674.68 4 
   729.24 4 
   70 30 
  100 2 
   47.8 4 



    115.717
     54.536
      0.0
7/2+
5/2-
3/2-
    741.72 5      F     L     9/2+      226.5 4 
   561.40 5 
   626.19 7 
  <62
  100 5 
   96 5 



    514.671
    180.229
    115.717
7/2-
9/2+
7/2+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    746.9 5          J  M OP (3/2-)      221
   231
   273
   693
   748
    8 3 
   14 3 
    8 3 
  100 10 
 





    524.847
    514.671
    474.630
     54.536
      0.0
5/2+
7/2-
3/2+
5/2-
3/2-
    751.436 12 A    FGHI  L NO  3/2+      226.63 3 
   276.86 5 
   635.75 9 
   687.502 13 
   696.94 4 
   750.8 6 ?
    3.2 6 
    3.5 7 
    3.9 8 
  100 10 
    6.1 6 
  ≤12






    524.847
    474.630
    115.717
     63.916
     54.536
      0.0
5/2+
3/2+
7/2+
5/2+
5/2-
3/2-
    762.670 17 A   EFGHI  L  O  3/2-      238.49 19 
   288.023 19 
   328.3 2 
   762.69 3 
    5.4 12 
   18.6 15 
    4.0 15 
  100 5 




    524.847
    474.630
    434.426
      0.0
5/2+
3/2+
5/2-
3/2-
    771.302 17 A   EFG    L  O  (7/2+)      163.7 2 
   246.5 2 
   543.93 6 
   591.097 19 
   655.592 28 
   707.46 9 
   716.92 10 
    4.2 24 
    4.2 24 
  ≤21
   85 8 
  100 10 
   25 4 
   15 4 







    607.589
    524.847
    226.983
    180.229
    115.717
     63.916
     54.536
7/2(+)
5/2+
9/2-
9/2+
7/2+
5/2+
5/2-
    788.54 3     EFG    LM    5/2-      657.07 4 
   734.05 4 
   788.46 6 
   54 3 
  100 5 
   36.0 20 



    131.451
     54.536
      0.0
7/2-
5/2-
3/2-
    793.67 4      FGHI  L NO  1/2-      358.92 15 ?
   739.10 7 
   793.68 5 
    6.7 19 
   10 4 
  100 6 



    434.426
     54.536
      0.0
5/2-
5/2-
3/2-
    794 3     E    J       (5/2-)        
    801.32 9            L   P 17/2- 2.6 ps 2     161.0 1 
   189.1
   292.4
   322.7 1 
   19 8 
    1.2 5 
    7.8 17 
  100 8 

E1
E1
[E2]
    640.33
    612.1
    508.93
    478.62
15/2-
17/2+
15/2+
13/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    806.67 12            L     11/2+      534.45 11 
  100

    272.22
11/2+
    809.13 3     EFGHIJ LMNO  3/2-      284.26 20 
   334.36 20 
   754.59 3 
   809.25 10 
    6.8 15 
   12.3 18 
  100 5 
   16 5 




    524.847
    474.630
     54.536
      0.0
5/2+
3/2+
5/2-
3/2-
    814.11 4 A    FG    L  OP (5/2-)      339.19 12 
   682.60 6 
   698.51 9 
   750.24 10 
   759.75 15 
   814.22 10 
   22.2 12 
   58 17 
   45.5 24 
  100 5 
   15.6 12 
   47 3 






    474.630
    131.451
    115.717
     63.916
     54.536
      0.0
3/2+
7/2-
7/2+
5/2+
5/2-
3/2-
    816.50 5      F  I  L     (5/2+)      685.14 10 
   700.56 19 
   752.55 8 
   816.50 9 
   40.7 18 
   43 3 
  100 5 
   48 3 




    131.451
    115.717
     63.916
      0.0
7/2-
7/2+
5/2+
3/2-
    816.574 15 A                (5/2,7/2-)      129.5 2 
   209.0 2 
   291.69 7 
   342.0
   685.2 2 
   700.856 16 
   752.61 4 
   762.7 6 ?
   816.64 4 
    4.1 22 
    6 3 
    7.4 19 
 
   16 8 
  100 10 
   87 9 
  ≈11
   24 4 









    686.667
    607.589
    524.847
    474.630
    131.451
    115.717
     63.916
     54.536
      0.0
5/2+,7/2+
7/2(+)
5/2+
3/2+
7/2-
7/2+
5/2+
5/2-
3/2-
    827 1      F                  
    831.9 5                P 19/2+      219.9
   323.1
 
 


    612.1
    508.93
17/2+
15/2+
    840 4     E    J  M O  (5/2-)        
    840.42 8      F     L     7/2-      613.10 15 
   785.90 9 
   840.9 2 
   19.7 21 
   61 3 
  100 13 



    226.983
     54.536
      0.0
9/2-
5/2-
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    849.3 2              NO  11/2+,13/2+      488.23 14 
  100

    361.04
13/2+
    875 2      F                  
    887.93 6            LM    5/2-      833.19 13 
   887.97 6 
  100 18 
   91 5 


     54.536
      0.0
5/2-
3/2-
    902 3     E    J    O  (7/2-)        
    916            M O         
    919.31 4 A   EF     L N   (7/2+,9/2-)      647.65 20 
   739.34 12 
   803.35 5 
   865.28 9 
   11 2 
   89 28 
   80 6 
  100 6 




    272.22
    180.229
    115.717
     54.536
11/2+
9/2+
7/2+
5/2-
    937.2 6       G          1/2+,3/2+        
    939.3 7                P 21/2+      107.3
   327.2
 
 


    831.9
    612.1
19/2+
17/2+
    952 1      F                  
    964 3     E    J  M O  (9/2-)        
    972 2      FG I               
    981 5          J    O  (9/2-)        
    996.6 9         IJ              
   1002.53 12                P 19/2- 1.81 ps 16     171.3
   201 1 
   362.2 1 
   390.5
    0.9 3 
   19 14 
  100 14 
   25 4 
E1

[E2]
[E1]
    831.9
    801.32
    640.33
    612.1
19/2+
17/2-
15/2-
17/2+
   1015 2             M           
   1041.50 20      FGHIJ L     1/2,3/2-     1041.5 2 
  100

      0.0
3/2-
   1044 7     E            3/2-        
   1049.68 4 A    FG    L          615.2 3 
   934.24 8 
   985.69 4 
   42.3 24 
   48.8 24 
  100 5 



    434.426
    115.717
     63.916
5/2-
7/2+
5/2+
   1059.67 7      F     L     3/2,5/2      584.92 12 
   625.31 25 
   996.13 14 
  1059.53 11 
   92 11 
   30 8 
  120 20 
  100 10 




    474.630
    434.426
     63.916
      0.0
3/2+
5/2-
5/2+
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  ≈1060              O  (11/2-)        
   1060.07 6 A                3/2+,5/2      585.46 20 
   625.6 2 
   944.21 10 
   996.38 12 
  1060.06 10 
   55 17 
   45 14 
  100 31 
   93 28 
   86 28 





    474.630
    434.426
    115.717
     63.916
      0.0
3/2+
5/2-
7/2+
5/2+
3/2-
   1062.5 6      F  I               
   1093.04 6      FGHI   M O  1/2+,3/2+        
   1108.3 11     E G  J  M O         
   1136.7 3         I   M           
   1142.0 8         IJ    O  5/2+        
   1157.0 9      FG I        5/2+        
   1166.8 11       G                 
   1184.5 5     E   IJ    O         
   1185.62 13                P 21/2- 1.15 ps 17     183.3
   353.6
   384.3 1 
 
 
 



   1002.53
    831.9
    801.32
19/2-
19/2+
17/2-
   1204 5     E    J    O         
   1231.50 10 A    F     LM    5/2+,7/2,9/2+     1051.57 15 
  1115.53 15 ?
  1167.38 12 
   55 17 
   40 12 
  100 24 



    180.229
    115.717
     63.916
9/2+
7/2+
5/2+
   1238.1 11       G          1/2+,3/2+        
   1241.1 9                P 23/2+      409.2
  100

    831.9
19/2+
   1247.20 7      FG I  L  O  1/2+,3/2+      560.1 8 ?
   722.55 10 ?
   772.62 8 
  1247.10 10 
  100 4 
   76 7 
   57 4 
   55 4 




    686.667
    524.847
    474.630
      0.0
5/2+,7/2+
5/2+
3/2+
3/2-
   1249.6 4        HI        1/2+,3/2+        
   1282.7 9     EF HIJ  M    1/2+,3/2+        
   1285.8 11       G  J       1/2,3/2        
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1298.25 17       GHIJ       1/2+,3/2+        
   1305 5               O         
   1316.39 6     EFGHIJ  M O  1/2-,3/2-     1316.38 6 
  100

      0.0
3/2-
   1332.7 20       GHIJ  M    1/2+,3/2+        
   1339.10 24        HI     O  1/2+,3/2+        
   1344.8 13                P 25/2+      405.5
  100

    939.3
21/2+
   1349.13 6      FGHIJ  M O  1/2-     1285.20 6 
  1349.18 13 
  100 4 
   53 5 


     63.916
      0.0
5/2+
3/2-
   1377.4 22     E   I   M           
   1387.06 5     EFGHI   M    1/2-,3/2-     1387.05 5 
  100

      0.0
3/2-
   1393 5     E    J    O  (7/2-)        
   1399.3 5     E   I   M           
   1412.71 17       GHI     O  1/2-,3/2-        
   1423.9 8                P 23/2- 0.60 ps 5     421.4
   484.5
 
 


   1002.53
    939.3
19/2-
21/2+
   1437.2 6         IJ  M           
   1446.5 9         I        5/2+        
   1455 2             M           
   1467.4 13     E   IJ    O  5/2        
   1477.90 23     E GHIJ  M           
   1486.8 5      F   J  M    1/2,3/2        
   1490.07 5      FGHIJ       3/2+     1435.59 9 
  1490.03 6 
   38.9 23 
  100 3 


     54.536
      0.0
5/2-
3/2-
   1510 2             M           
   1521.36 17     EFGHIJ    O  3/2-     1457.44 17 
  100

     63.916
5/2+
   1526.12 6      FGHI     O  1/2,3/2     1526.11 6 
  100

      0.0
3/2-
   1536.6 15       G          1/2+,3/2+        
   1540.0 5      F           1/2+,3/2+        
   1552.0 5        HIJ    O  1/2+,3/2+        
   1552.2 2              N   5/2+     1420.97 18 
  1497.30 30 
  1552.35 22 
   95 19 
  100 20 
   88 17 



    131.451
     54.536
      0.0
7/2-
5/2-
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1556.3 5         IJ    O         
   1562.7 5        HI     O  1/2+,3/2+        
   1563.1 6              N   (3/2-,5/2,7/2-)     1431.8 4 
  1507.7 8 
  1563.6 6 
   58 21 
   64 25 
  100 32 



    131.451
     54.536
      0.0
7/2-
5/2-
3/2-
   1564.7 17        HI     O  1/2,3/2+        
   1568.48 20      FGHI     O         
   1574.1 4     E   I     O         
   1583.7 4     E  HI     O  (1/2+,3/2+)        
   1589.68 12     EFGHIJ    O  1/2,3/2     1589.67 12 
  100

      0.0
3/2-
   1589.8 2              N   3/2+,5/2+     1064.74 20 
  1115.55 16 
  1154.87 22 
   33 6 
  100 12 
   46 7 



    524.847
    474.630
    434.426
5/2+
3/2+
5/2-
   1606.8 6     E   I     O         
   1611.88 18        HIJ    O  1/2-,3/2-        
   1614.13 8      FG  J    O  (3/2-)     1482.56 20 
  1498.55 10 
  1613.83 16 
   59 9 
   81 5 
  100 12 



    131.451
    115.717
      0.0
7/2-
7/2+
3/2-
   1616.68 20        HIJ    O  1/2-,3/2-        
   1623.1 9                P 25/2-      381.9
   437.5
 
 


   1241.1
   1185.62
23/2+
21/2-
   1635.8 4       GHI     O  (1/2,3/2)+        
   1649.0 6         I               
   1658.76 10      FGHIJ       1/2-,3/2-     1604.20 10 
  1658.9 3 
  100 6 
   91 16 


     54.536
      0.0
5/2-
3/2-
   1667.58 11      FGHI     O  (1/2,3/2)-     1667.57 11 
  100

      0.0
3/2-
   1678.9 7        HI        (1/2,3/2)+        
   1692.2 4       GHI               
   1701.7 5        HI               
   1707.0 15       G          (1/2,3/2)+        
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1717.66 15      FGHI     O  (1/2,3/2)-        
   1720.70 16        HI     O  (1/2,3/2)        
   1732.5 14                P 27/2+      491.4
  100

   1241.1
23/2+
   1735.6 2              N   5/2+      984.23 22 
  1221.20 30 
  1301.13 13 
   29 7 
   31 7 
  100 12 



    751.436
    514.671
    434.426
3/2+
7/2-
5/2-
   1736.4 3        HI     O  1/2-,3/2-        
   1739.7 9      FGHIJ    O  1/2-,3/2-        
   1750.14 15      FGHIJ       1/2-,3/2-        
   1760.09 23        HIJ       1/2+,3/2+        
   1766.6 15        H J       1/2+,3/2+        
   1788.2 5        HIJ       1/2+,3/2+        
   1798.6 7     EFG IJ       (3/2-)        
   1802.0 3        HIJ              
   1810         J    O         
   1824.10 9      FGHI        1/2-,3/2-     1769.55 9 
  100

     54.536
5/2-
   1825 5               O  7/2+        
   1825.6 1              N   5/2+     1310.89 15 
  1350.86 21 
  1391.24 6 
  1709.8 4 
   37 4 
    9.4 19 
  100 6 
    9 2 




    514.671
    474.630
    434.426
    115.717
7/2-
3/2+
5/2-
7/2+
   1827.3 16                P 29/2+      482.5
  100

   1344.8
25/2+
   1836.2 3     E  HIJ    O  1/2-,3/2-        
   1844.91 6     EFGHIJ    O      1330.22 6 
  1665.6 6 
  100 3 
   13 5 


    514.671
    180.229
7/2-
9/2+
   1850.7 4        HIJ       1/2+,3/2+        
   1856.6 10      FGHI        1/2+,3/2+        
   1861.72 18        HI        1/2-,3/2-        
   1864.1 15       G  J       1/2,3/2        
   1867.94 16      F  IJ           1804.1 3 
  1867.90 18 
   61 10 
  100 11 


     63.916
      0.0
5/2+
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   1889.26 18      F HI        1/2-,3/2-        
   1896.36 25     E  HI        1/2+,3/2+        
   1896.4 13                P 27/2-      472.5
  100

   1423.9
23/2-
   1902 15               O  11/2-        
   1905.9 4              N   (11/2-)     1326.6 2 
  1478.8 3 
  1543.6 5 
  1632.8 4 
  1679.8 5 
  1724.9 4 
  100 15 
   15.5 57 
   34 9 
   13 5 
   56 12 
   25 7 






    579.40
    426.539
    361.04
    272.22
    226.983
    180.229
(13/2-)
11/2-
13/2+
11/2+
9/2-
9/2+
   1906.1 4        H J              
   1915.88 14        HI        1/2-,3/2-        
   1920.91 25      F HI        1/2,3/2        
   1927.47 8      F   J       3/2+,5/2,7/2-     1811.8 4 
  1927.45 8 
   49 21 
  100 3 


    115.717
      0.0
7/2+
3/2-
   1937.18 20      F HIJ       1/2-,3/2-        
   1953.0 5     EF HI     O  1/2+,3/2+        
   1956.0 10     EF HI K   O  1/2-,3/2-     1956
  100

      0.0
3/2-
   1959.3 9     E   I     O         
   1963.3 8        H      O         
   1973.7 4      F           1/2,3/2        
   1976.0 10        HI K      1/2,3/2     1976
 

      0.0
3/2-
   1984.0 5      F HI        1/2-,3/2-        
   1992.01 23      F HI        1/2-,3/2-        
   1997.3 5     EF HI        1/2+,3/2+        
   2015.8 7        H                
   2028.6 6 ?        I               
   2038.04 25      F HI        1/2-,3/2-        
   2044.4 5      F H                
   2052.2 3      F HI               
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   2073.0 10        HI K      (1/2,3/2)     2073
  100

      0.0
3/2-
   2094.2 3        HI        1/2+,3/2+        
   2099.3 3        HI               
   2108.7 13                P 29/2+      485.6
  100

   1623.1
25/2-
   2118.1 4     E  HI        1/2-,3/2-        
   2123.3 7     E  HI               
   2131.0 10        HI K          2131
  100

      0.0
3/2-
   2135.9 4        HI               
   2146.7 3        HI        1/2-,3/2-        
   2164.81 16        HI        1/2-,3/2-        
   2173.6 3        HI        1/2-,3/2-        
   2180.0 10        HI K          2180
  100

      0.0
3/2-
   2181.2 3        HI               
   2188.56 20        HI        1/2-,3/2-        
   2200.0 10        HI K      1/2-,3/2-     2200
  100

      0.0
3/2-
   2207.75 21        HI        1/2-,3/2-        
   2218.1 3        HI        1/2-,3/2-        
   2230.3 3        HI        1/2-,3/2-        
   2242.2 6        HI               
   2250.0 10        HI K          2250
  100

      0.0
3/2-
   2253.0 10           K          2253
  100

      0.0
3/2-
   2259.48 25        HI        1/2-,3/2-        
   2276.2 8        HI               
   2290.0 10        HI K      1/2-,3/2-     2290
 

      0.0
3/2-
   2303.4 7        HI               
   2306.0 10        HI K          2306
 

      0.0
3/2-
   2317.1 3        HI        1/2-,3/2-        
   2328.1 4        HI               
   2335.0 10        HI K      1/2-,3/2-     2335
  100

      0.0
3/2-
   2342.8 4        HI               
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   2346.0 10           K          2346
  100

      0.0
3/2-
   2352.6 4        HI               
   2367.3 3        HI        1/2-,3/2-        
   2373.39 19        HI        1/2-,3/2-        
   2380.8 4        HI     O  1/2-,3/2-        
   2387.1 5        HI     O         
   2393.4 7        HI     O         
   2397.0 10           K          2397
  100

      0.0
3/2-
   2402.0 10        HI K   O      2402
  100

      0.0
3/2-
   2413.3 5        HI        1/2+,3/2+        
   2441.6 4        HI        1/2-,3/2-        
   2446.0 10           K          2446
  100

      0.0
3/2-
   2465.7 7        HI               
   2469.3 6        HI        1/2-,3/2-        
   2488.0 10           K          2488
  100

      0.0
3/2-
   2491.9 3        HI        1/2+,3/2+        
   2504.0 10           K          2504
  100

      0.0
3/2-
   2509.0 10           K          2509
  100

      0.0
3/2-
   2519.0 10        HI K          2519
  100

      0.0
3/2-
   2523.9 5        HI               
   2527.0 10           K          2527
  100

      0.0
3/2-
   2537.0 10           K          2537
  100

      0.0
3/2-
   2542.0 10        HI K          2542
  100

      0.0
3/2-
   2547.0 10           K          2547
  100

      0.0
3/2-
   2556.0 10        HI K          2556
  100

      0.0
3/2-
   2564.0 10        HI K          2564
  100

      0.0
3/2-
   2571.3 4        HI               
   2581.0 10           K          2581
  100

      0.0
3/2-
   2585.2 3        HI        1/2-,3/2-        
   2592.0 10        HI K      1/2-,3/2-     2592
  100

      0.0
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   2594.0 10        HI K          2594
  100

      0.0
3/2-
   2607.8 3        HI        1/2-,3/2-        
   2614.7 4        HI        1/2-,3/2-        
   2626.0 5        HI               
   2633.0 10        HI K      1/2-,3/2-     2633
  100

      0.0
3/2-
   2650.6 6        HI               
   2657.0 10           K          2657
  100

      0.0
3/2-
   2659.2 5        HI        1/2+,3/2+        
   2663.2 11        HI               
   2666.3 5        HI        (1/2,3/2)+        
   2674.3 7           K          2620
  2674
  100
   96 21 


     54.536
      0.0
5/2-
3/2-
   2689.0 10           K          2689
  100

      0.0
3/2-
   2694.0 10           K          2694
  100

      0.0
3/2-
   2706.2 7           K          2575
  2706
  100
   68 10 


    131.451
      0.0
7/2-
3/2-
   2721.0 10           K          2721
  100

      0.0
3/2-
   2744.0 10           K          2744
  100

      0.0
3/2-
   2760.0 10           K          2760
 

      0.0
3/2-
   2778.4 7           K          2663
  2778
  100
   86 19 


    115.717
      0.0
7/2+
3/2-
   2787.0 10           K          2787
  100

      0.0
3/2-
   2798.0 10           K          2798
  100

      0.0
3/2-
   2827.0 7           K          2763
  2827
   75 11 
  100


     63.916
      0.0
5/2+
3/2-
   2841.0 10           K          2841
  100

      0.0
3/2-
   2846.0 10           K          2846
  100

      0.0
3/2-
   2858.0 10           K          2858
  100

      0.0
3/2-
   2863.0 10           K          2863
  100

      0.0
3/2-
   2883.0 10           K          2883
  100

      0.0
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   2906.0 10           K          2906
  100

      0.0
3/2-
   2916.3 7           K          2785
  2916
   98 17 
  100


    131.451
      0.0
7/2-
3/2-
   2925.3 7           K          2871
  2925
   35 7 
  100


     54.536
      0.0
5/2-
3/2-
   3020.3 7           K          2966
  3020
   60 9 
  100


     54.536
      0.0
5/2-
3/2-
   3035.0 10           K          3035
  100

      0.0
3/2-
   3040.0 10           K          3040
  100

      0.0
3/2-
   3049.4 7           K          2934
  3049
  100
   54 16 


    115.717
      0.0
7/2+
3/2-
   3057.0 10           K          3057
  100

      0.0
3/2-
   3078.3 7           K          2947
  3078
   79 18 
  100


    131.451
      0.0
7/2-
3/2-
   3084.3 7           K          3030
  3084
  100
   81 11 


     54.536
      0.0
5/2-
3/2-
   3088.0 10           K          3088
  100

      0.0
3/2-
   3100.0 10           K          3100
  100

      0.0
3/2-
   3106.0 10           K          3106
  100

      0.0
3/2-
   3131.0 10           K          3131
  100

      0.0
3/2-
   3154.0 10           K          3154
  100

      0.0
3/2-
   3158.0 7           K          3094
  3158
  100
   53 10 


     63.916
      0.0
5/2+
3/2-
   3162.0 10           K          3162
  100

      0.0
3/2-
   3228.0 10           K          3228
  100

      0.0
3/2-
   3233.0 10           K          3233
  100

      0.0
3/2-
   3239.0 10           K          3239
  100

      0.0
3/2-
   3251.0 10           K          3251
  100

      0.0
3/2-
   3268.0 10           K          3268
  100

      0.0
3/2-
   3272.0 10           K          3272
  100

      0.0
3/2-
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   3288.0 10           K          3288
  100

      0.0
3/2-
   3333.0 10           K          3333
  100

      0.0
3/2-
   3346.0 10           K          3346
  100

      0.0
3/2-
   3356.0 10           K          3356
  100

      0.0
3/2-
   3375.0 10           K          3375
  100

      0.0
3/2-
   3413.0 10           K          3413
  100

      0.0
3/2-
   3456.0 10           K          3456
  100

      0.0
3/2-
   3472.0 10           K          3472
  100

      0.0
3/2-
   3479.0 10           K          3479
  100

      0.0
3/2-
   3506.0 10           K          3506
  100

      0.0
3/2-
   3528.0 10           K          3528
  100

      0.0
3/2-
   3663.0 10           K          3663
  100

      0.0
3/2-
   3680.0 10           K          3680
  100

      0.0
3/2-
   3684.0 10           K          3684
  100

      0.0
3/2-
   3713.0 10           K          3713
  100

      0.0
3/2-
   3717.0 10           K          3717
  100

      0.0
3/2-
   3734.0 10           K          3734
  100

      0.0
3/2-
   3739.0 10           K          3739
  100

      0.0
3/2-
   3775.0 10           K          3775
  100

      0.0
3/2-
   3821.3 7           K          3767
  3821
  100
   96 38 


     54.536
      0.0
5/2-
3/2-
   3842.1 10           K          3842
  100

      0.0
3/2-

E(level): Values computed from least-squares fit to γ energies where there are populating or depopulating γ rays. Where there are no γ’s, values from reactions have been averaged. Reduced χ2=2.5 (critical χ2=1.3)

E(level): Above 800 many of the associations of levels from different reactions are not unique.

T1/2(level): From direct measurements in Coulomb excitation (1992Ku15), unless otherwise noted. Above 1800 keV additional, approximate values can be computed from 157Gd(γ,γ’) data.

E(γ): The data are primarily from the β- decay of 157Eu (1986GrZS), and secondarily from Coulomb excitation and from secondary γ’s from (n,γ).

E(γ): The unplaced γ’s are not repeated here, see 157Eu β- decay, (n,n’γ), and (n,γ). The primary γ’s from the 156Gd(n,γ) reaction with various energy neutrons are not given here; see those reactions.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - 3/2[521] band; α=10.82, B=0.0068.
      0.0 3/2- STABLE      
     54.536 6  5/2- 130 ps 8      54.548 8 
  100
M1+E2
      0.0
3/2-
    131.451 9  7/2- 100 ps 10      67.3
    76.925 14 
   131.438 16 
    0.9 8 
  100 3 
   30 3 
E1
M1+E2
E2
     63.916
     54.536
      0.0
5/2+
5/2-
3/2-
    226.983 19  9/2- 16.7 ps 15      95.7 2 
   112.8
   172.37 2 
  100 4 
    5.7 20 
   72 13 

E1
[E2]
    131.451
    115.717
     54.536
7/2-
7/2+
5/2-
    347.05 6  11/2- 12.2 ps 10     120.1 1 
   166.8
   215.6 1 
   75.9 18 
    9 3 
  100.0 18 

E1
[E2]
    226.983
    180.229
    131.451
9/2-
9/2+
7/2-
    478.62 4  13/2- 7.3 ps 6     116.6
   131.6 1 
   206.4
   251.63 3 
    0.6 3 
   40 4 
    9 3 
  100 4 
E1

E1
[E2]
    361.04
    347.05
    272.22
    226.983
13/2+
11/2-
11/2+
9/2-
    640.33 8  15/2- 4.3 ps 3     131.3
   161.7 1 
   279.4
   293.3 1 
    0.45 15 
   36 6 
   14 3 
  100 6 
E1

E1
[E2]
    508.93
    478.62
    361.04
    347.05
15/2+
13/2-
13/2+
11/2-
    801.32 9  17/2- 2.6 ps 2     161.0 1 
   189.1
   292.4
   322.7 1 
   19 8 
    1.2 5 
    7.8 17 
  100 8 

E1
E1
[E2]
    640.33
    612.1
    508.93
    478.62
15/2-
17/2+
15/2+
13/2-
   1002.53 12  19/2- 1.81 ps 16       
   1185.62 13  21/2- 1.15 ps 17     183.3
   353.6
   384.3 1 
 
 
 



   1002.53
    831.9
    801.32
19/2-
19/2+
17/2-
   1423.9 8  23/2- 0.60 ps 5     421.4
   484.5
 
 


   1002.53
    939.3
19/2-
21/2+
   1623.1 9  25/2-        
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - 5/2[642] band; α=7.76, B=-0.0145.
     63.916 5  5/2+ 0.46 µs 4       
    115.717 7  7/2+       51.834 14 
  100
M1+E2
     63.916
5/2+
    180.229 11  9/2+       64.4 2 
   116.314 28 
  100 50 
   30 8 
(M1+E2)

    115.717
     63.916
7/2+
5/2+
    272.22 3  11/2+       91.96 8 
   156.50 4 
  100 5 
   58 3 


    180.229
    115.717
9/2+
7/2+
    361.04 9  13/2+       88.8
   180.84 10 
 
  100


    272.22
    180.229
11/2+
9/2+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - 11/2[505] bandhead
    426.539 23  11/2- 18.5 µs 23 
% IT = 100
     
    579.40 8  (13/2-)      152.86 7 
  100

    426.539
11/2-
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - 5/2[523] band; α=11.46.
    434.426 6  5/2- < 0.1 ns      
    514.671 8  7/2-      334.441 10 
   383.17 3 
   398.953 9 
   450.761 10 
   517
   62 4 
    5.3 8 
  100 5 
   92 6 
 





    180.229
    131.451
    115.717
     63.916
      0.0
9/2+
7/2-
7/2+
5/2+
3/2-
    617.38 3  9/2-      345.16 6 
   437.06 6 
   501.70 4 
   48 3 
   42.9 22 
  100 7 



    272.22
    180.229
    115.717
11/2+
9/2+
7/2+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 5 - 3/2[402] band; α=10.04.
    474.630 6  3/2+ < 0.1 ns      
    524.847 7  5/2+      344.61 6 
   393.408 20 
   409.135 10 
   460.923 9 
   470.389 26 
   524.835 18 
    1.3 3 
    4.6 5 
  100 5 
   36.2 25 
    7.4 7 
   11.3 11 






    180.229
    131.451
    115.717
     63.916
     54.536
      0.0
9/2+
7/2-
7/2+
5/2+
5/2-
3/2-
    607.589 15  7/2(+)      380.38 6 
   427.355 15 
   491.89 3 
   543.93 6 
   553.02 7 
   20 3 
  100 10 
   57 8 
    7.5 8 
   17.3 10 





    226.983
    180.229
    115.717
     63.916
     54.536
9/2-
9/2+
7/2+
5/2+
5/2-
    664.44 5  9/2+      392.19 4 
   533.18 14 
   548.83 12 
  100 5 
   16 10 
   13.0 15 



    272.22
    131.451
    115.717
11/2+
7/2-
7/2+
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 6 - 1/2[400] bandhead
    682.82 4  1/2+        
    751.436 12  3/2+      226.63 3 
   276.86 5 
   635.75 9 
   687.502 13 
   696.94 4 
   750.8 6 ?
    3.2 6 
    3.5 7 
    3.9 8 
  100 10 
    6.1 6 
  ≤12






    524.847
    474.630
    115.717
     63.916
     54.536
      0.0
5/2+
3/2+
7/2+
5/2+
5/2-
3/2-
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 7 - 1/2[521] band
    701.39 4  (1/2)-        
    746.9 5  (3/2-)      221
   231
   273
   693
   748
    8 3 
   14 3 
    8 3 
  100 10 
 





    524.847
    514.671
    474.630
     54.536
      0.0
5/2+
7/2-
3/2+
5/2-
3/2-
    840.42 8  7/2-      613.10 15 
   785.90 9 
   840.9 2 
   19.7 21 
   61 3 
  100 13 



    226.983
     54.536
      0.0
9/2-
5/2-
3/2-
    981 5  (9/2-)     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 8 - 1/2[530] band; α=5.6, a=-0.10.
    793.67 4  1/2-        
    809.13 3  3/2-      284.26 20 
   334.36 20 
   754.59 3 
   809.25 10 
    6.8 15 
   12.3 18 
  100 5 
   16 5 




    524.847
    474.630
     54.536
      0.0
5/2+
3/2+
5/2-
3/2-
    887.93 6  5/2-      833.19 13 
   887.97 6 
  100 18 
   91 5 


     54.536
      0.0
5/2-
3/2-
    964 3  (9/2-)     
  ≈1060 (11/2-)     
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 9 - 3/2[532] bandhead
    762.670 17  3/2-        
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 10 - 5/2[512] expected bandhead (only first (7/2-) level known)
   1393 5  (7/2-)        
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 11 - 7/2[404] bandhead
   1825 5  7/2+        
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 12 - 3/2[651] band
    683.236 9  3/2+ < 0.3 ns      
    741.72 5  9/2+      226.5 4 
   561.40 5 
   626.19 7 
  <62
  100 5 
   96 5 



    514.671
    180.229
    115.717
7/2-
9/2+
7/2+
    771.302 17  (7/2+)      163.7 2 
   246.5 2 
   543.93 6 
   591.097 19 
   655.592 28 
   707.46 9 
   716.92 10 
    4.2 24 
    4.2 24 
  ≤21
   85 8 
  100 10 
   25 4 
   15 4 







    607.589
    524.847
    226.983
    180.229
    115.717
     63.916
     54.536
7/2(+)
5/2+
9/2-
9/2+
7/2+
5/2+
5/2-
    806.67 12  11/2+      534.45 11 
  100

    272.22
11/2+

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Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
     54.536 5/2- 130 ps 8      54.548 8 M1+E20.19 412.1B(E2)(W.u.)=4.8×102 20, B(M1)(W.u.)=0.077 6, α=12.1 3, α(K)=9.50 17, α(L)=2.0 3, α(M)=0.45 7, α(N)=0.102 14, α(O)=0.0150 18, α(P)=0.000718 13
     63.916 5/2+ 0.46 µs 4       9.365 12 E1 30.8B(E1)(W.u.)=1.04E-5 21, α=30.8
5/2+ 0.46 µs 4      63.929 8 E1 0.961B(E1)(W.u.)=4.6E-7 8, α=0.961, α(K)=0.795 12, α(L)=0.1301 19, α(M)=0.0283 4, α(N)=0.00634 9, α(O)=0.000904 13, α(P)=4.18E-5 6
    115.717 7/2+       51.834 14 M1+E20.20 14.06α=14.06, α(K)=10.86 16, α(L)=2.50 4, α(M)=0.560 8, α(N)=0.1272 18, α(O)=0.0184 3, α(P)=0.000831 12
    131.451 7/2- 100 ps 10      67.3E1 0.840B(E1)(W.u.)=1.2E-5 11, α=0.840, α(K)=0.697 10, α(L)=0.1126 16, α(M)=0.0244 4, α(N)=0.00549 8, α(O)=0.000786 11, α(P)=3.68E-5 6
7/2- 100 ps 10      76.925 14 M1+E20.18 4.36B(E2)(W.u.)=220 25, B(M1)(W.u.)=0.079 9, α=4.36, α(K)=3.57 5, α(L)=0.619 9, α(M)=0.1366 20, α(N)=0.0312 5, α(O)=0.00469 7, α(P)=0.000265 4
7/2- 100 ps 10     131.438 16 E2 0.940B(E2)(W.u.)=144 21, α=0.940, α(K)=0.543 8, α(L)=0.307 5, α(M)=0.0719 10, α(N)=0.01609 23, α(O)=0.00214 3, α(P)=2.82E-5 4
    180.229 9/2+       64.4 2 (M1+E2) 10.4α=10.4 32, α(K)=4.5 16, α(L)=4.5 37, α(M)=1.07 88, α(N)=0.24 20, α(O)=0.031 25, α(P)=3.0×10-4 15
    226.983 9/2- 16.7 ps 15     112.8E1 0.211B(E1)(W.u.)=0.00027 10, α=0.211, α(K)=0.1775 25, α(L)=0.0264 4, α(M)=0.00572 8, α(N)=0.001294 19, α(O)=0.000190 3, α(P)=1.009E-5 15
9/2- 16.7 ps 15     172.37 2 [E2] 0.367B(E2)(W.u.)=1.6×103 4, α=0.367, α(K)=0.242 4, α(L)=0.0962 14, α(M)=0.0223 4, α(N)=0.00501 7, α(O)=0.000680 10, α(P)=1.345E-5 19
    347.05 11/2- 12.2 ps 10     166.8E1 0.0736B(E1)(W.u.)=0.00018 7, α=0.0736, α(K)=0.0622 9, α(L)=0.00893 13, α(M)=0.00193 3, α(N)=0.000439 7, α(O)=6.56E-5 10, α(P)=3.73E-6 6
11/2- 12.2 ps 10     215.6 1 [E2] 0.1731B(E2)(W.u.)=9.8×102 9, α=0.1731, α(K)=0.1232 18, α(L)=0.0387 6, α(M)=0.00889 13, α(N)=0.00200 3, α(O)=0.000276 4, α(P)=7.20E-6 11
    426.539 11/2- 18.5 µs 23 
% IT = 100
   199[M1,E2] 0.26B(E2)(W.u.)<0.0007, B(M1)(W.u.)<5.4E-8, α=0.26 4, α(K)=0.20 5, α(L)=0.044 10, α(M)=0.0100 24, α(N)=0.0023 5, α(O)=0.00033 6, α(P)=1.36E-5 47
11/2- 18.5 µs 23 
% IT = 100
   246.31 2 [E1] 0.0263B(E1)(W.u.)=5.1E-10 8, α=0.0263, α(K)=0.0223 4, α(L)=0.00313 5, α(M)=0.000676 10, α(N)=0.0001541 22, α(O)=2.33E-5 4, α(P)=1.397E-6 20
    434.426 5/2- < 0.1 ns    302.994 28 [M1,E2] 0.076α=0.076 18, α(K)=0.062 17, α(L)=0.0109 3, α(M)=0.00241 4, α(N)=0.000551 10, α(O)=8.2×10-5 5, α(P)=4.3E-6 16
5/2- < 0.1 ns    318.710 8 E1 0.01370B(E1)(W.u.)>1.4E-5, α=0.01370, α(K)=0.01165 17, α(L)=0.001608 23, α(M)=0.000347 5, α(N)=7.93E-5 12, α(O)=1.207E-5 17, α(P)=7.45E-7 11
5/2- < 0.1 ns    370.509 8 E1 0.00947B(E1)(W.u.)>3.4E-5, α=0.00947, α(K)=0.00807 12, α(L)=0.001105 16, α(M)=0.000238 4, α(N)=5.45E-5 8, α(O)=8.32E-6 12, α(P)=5.22E-7 8
5/2- < 0.1 ns    379.905 9 [M1,E2] 0.041α=0.041 11, α(K)=0.034 10, α(L)=0.0055 7, α(M)=0.00121 12, α(N)=0.00028 3, α(O)=4.2×10-5 6, α(P)=2.37E-6 84
5/2- < 0.1 ns    434.388 13 [M1,E2] 0.0283α=0.0283 80, α(K)=0.0236 73, α(L)=0.0037 6, α(M)=0.00082 12, α(N)=0.00019 3, α(O)=2.8×10-5 5, α(P)=1.67E-6 59
    474.630 3/2+ < 0.1 ns    358.931 15 [E2] 0.0351B(E2)(W.u.)>0.26, α=0.0351, α(K)=0.0276 4, α(L)=0.00588 9, α(M)=0.001321 19, α(N)=0.000300 5, α(O)=4.32E-5 6, α(P)=1.777E-6 25
3/2+ < 0.1 ns    410.723 9 M1+E21.0 LE0.037B(M1)(W.u.)>0.0013, α=0.037 5, α(K)=0.031 5, α(L)=0.0047 4, α(M)=0.00102 7, α(N)=0.000234 15, α(O)=3.6×10-5 3, α(P)=2.3E-6 4
3/2+ < 0.1 ns    420.090 9 [E1] 0.00703B(E1)(W.u.)>1.3E-6, α=0.00703, α(K)=0.00599 9, α(L)=0.000815 12, α(M)=0.0001758 25, α(N)=4.02E-5 6, α(O)=6.16E-6 9, α(P)=3.91E-7 6
3/2+ < 0.1 ns    474.625 11 [E1] 0.00530B(E1)(W.u.)>2.5E-6, α=0.00530, α(K)=0.00452 7, α(L)=0.000612 9, α(M)=0.0001318 19, α(N)=3.02E-5 5, α(O)=4.63E-6 7, α(P)=2.97E-7 5
    478.62 13/2- 7.3 ps 6     116.6E1 0.193B(E1)(W.u.)=8.E-5 4, α=0.193, α(K)=0.1624 23, α(L)=0.0241 4, α(M)=0.00521 8, α(N)=0.001180 17, α(O)=0.0001740 25, α(P)=9.28E-6 13
13/2- 7.3 ps 6     206.4E1 0.0418B(E1)(W.u.)=0.00020 7, α=0.0418, α(K)=0.0354 5, α(L)=0.00501 7, α(M)=0.001082 16, α(N)=0.000247 4, α(O)=3.71E-5 6, α(P)=2.17E-6 3
13/2- 7.3 ps 6     251.63 3 [E2] 0.1047B(E2)(W.u.)=9.5×102 10, α=0.1047, α(K)=0.0774 11, α(L)=0.0212 3, α(M)=0.00484 7, α(N)=0.001092 16, α(O)=0.0001528 22, α(P)=4.68E-6 7
E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
    640.33 15/2- 4.3 ps 3     131.3E1 0.1401B(E1)(W.u.)=6.8E-5 24, α=0.1401, α(K)=0.1181 17, α(L)=0.01729 25, α(M)=0.00374 6, α(N)=0.000849 12, α(O)=0.0001257 18, α(P)=6.86E-6 10
15/2- 4.3 ps 3     279.4E1 0.0191B(E1)(W.u.)=0.00022 6, α=0.0191, α(K)=0.01619 23, α(L)=0.00225 4, α(M)=0.000486 7, α(N)=0.0001110 16, α(O)=1.684E-5 24, α(P)=1.025E-6 15
15/2- 4.3 ps 3     293.3 1 [E2] 0.0646B(E2)(W.u.)=7.7×102 9, α=0.0646, α(K)=0.0492 7, α(L)=0.01198 17, α(M)=0.00272 4, α(N)=0.000614 9, α(O)=8.71E-5 13, α(P)=3.06E-6 5
    683.236 3/2+ < 0.3 ns    567.58 4 [E2] 0.01007B(E2)(W.u.)>0.022, α=0.01007, α(K)=0.00827 12, α(L)=0.001406 20, α(M)=0.000311 5, α(N)=7.09E-5 10, α(O)=1.056E-5 15, α(P)=5.60E-7 8
3/2+ < 0.3 ns    683.162 27 [E1] 0.00641B(E1)(W.u.)>1.3E-7, α=0.00641, α(K)=0.00532 8, α(L)=0.000849 12, α(M)=0.000186 3, α(N)=4.26E-5 6, α(O)=6.42E-6 9, α(P)=3.65E-7 6
    801.32 17/2- 2.6 ps 2     189.1E1 0.0527B(E1)(W.u.)=0.00012 6, α=0.0527, α(K)=0.0446 7, α(L)=0.00634 9, α(M)=0.001371 20, α(N)=0.000312 5, α(O)=4.68E-5 7, α(P)=2.71E-6 4
17/2- 2.6 ps 2     292.4E1 0.01699B(E1)(W.u.)=0.00021 6, α=0.01699, α(K)=0.01444 21, α(L)=0.00200 3, α(M)=0.000432 6, α(N)=9.88E-5 14, α(O)=1.499E-5 21, α(P)=9.17E-7 13
17/2- 2.6 ps 2     322.7 1 [E2] 0.0482B(E2)(W.u.)=9.3×102 14, α=0.0482, α(K)=0.0373 6, α(L)=0.00850 12, α(M)=0.00192 3, α(N)=0.000435 7, α(O)=6.21E-5 9, α(P)=2.36E-6 4
   1002.53 19/2- 1.81 ps 16     171.3E1 0.0685B(E1)(W.u.)=0.00015 6, α=0.0685, α(K)=0.0580 9, α(L)=0.00830 12, α(M)=0.00180 3, α(N)=0.000408 6, α(O)=6.11E-5 9, α(P)=3.48E-6 5
19/2- 1.81 ps 16     362.2 1 [E2] 0.0342B(E2)(W.u.)=6.7×102 15, α=0.0342, α(K)=0.0269 4, α(L)=0.00570 8, α(M)=0.001281 18, α(N)=0.000290 4, α(O)=4.19E-5 6, α(P)=1.735E-6 25
19/2- 1.81 ps 16     390.5[E1] 0.00835B(E1)(W.u.)=0.00036 9, α=0.00835, α(K)=0.00712 10, α(L)=0.000972 14, α(M)=0.000210 3, α(N)=4.80E-5 7, α(O)=7.33E-6 11, α(P)=4.62E-7 7

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0.03/2- STABLE Q=+1.36 2, μ=-0.3398 7
δ<r2>(156,157)=0.031 fm2 4 (1987GaZN).
E(level): δ<r2>(156,157)=0.031 fm2 4 (1987GaZN). 3/2[521] band; α=10.82, B=0.0068.
     54.5365/2- 130 ps 8  Q=-0.46 2
E(level): 3/2[521] band; α=10.82, B=0.0068.
     63.9165/2+ 0.46 µs 4  Q=2.43 7, μ=-0.464 11
E(level): 5/2[642] band; α=7.76, B=-0.0145.
    115.7177/2+   E(level): 5/2[642] band; α=7.76, B=-0.0145.
    131.4517/2- 100 ps 10  E(level): 3/2[521] band; α=10.82, B=0.0068.
    180.2299/2+   E(level): 5/2[642] band; α=7.76, B=-0.0145.
    226.9839/2- 16.7 ps 15  E(level): 3/2[521] band; α=10.82, B=0.0068.
    272.2211/2+   E(level): 5/2[642] band; α=7.76, B=-0.0145.
    347.0511/2- 12.2 ps 10  E(level): 3/2[521] band; α=10.82, B=0.0068.
    361.0413/2+   E(level): 5/2[642] band; α=7.76, B=-0.0145.
    426.53911/2- 18.5 µs 23 
% IT = 100
E(level): 11/2[505] bandhead.
    434.4265/2- < 0.1 ns E(level): 5/2[523] band; α=11.46.
    474.6303/2+ < 0.1 ns E(level): 3/2[402] band; α=10.04.
    478.6213/2- 7.3 ps 6  E(level): 3/2[521] band; α=10.82, B=0.0068.
    508.9315/2+   XREF: O(513).
    514.6717/2-   E(level): 5/2[523] band; α=11.46.
    524.8475/2+   E(level): 3/2[402] band; α=10.04.
    579.40(13/2-)   E(level): 11/2[505] bandhead.
    607.5897/2(+)   E(level): 3/2[402] band; α=10.04.
    617.389/2-   E(level): 5/2[523] band; α=11.46.
    640.3315/2- 4.3 ps 3  E(level): 3/2[521] band; α=10.82, B=0.0068.
    664.449/2+   E(level): 3/2[402] band; α=10.04.
    682.821/2+   E(level): 1/2[400] bandhead.
    683.2363/2+ < 0.3 ns E(level): 3/2[651] band.
    701.39(1/2)-   E(level): 1/2[521] band.
E(level)Jπ(level)T1/2(level)Comments
    741.729/2+   E(level): 3/2[651] band.
    746.9(3/2-)   E(level): 1/2[521] band.
    751.4363/2+   E(level): 1/2[400] bandhead.
    762.6703/2-   E(level): 3/2[532] bandhead.
    771.302(7/2+)   E(level): 3/2[651] band.
    793.671/2-   E(level): 1/2[530] band; α=5.6, a=-0.10.
    801.3217/2- 2.6 ps 2  E(level): 3/2[521] band; α=10.82, B=0.0068.
    806.6711/2+   E(level): 3/2[651] band.
    809.133/2-   XREF: E(816).
E(level): 1/2[530] band; α=5.6, a=-0.10.
    840(5/2-)   XREF: E(845)J(834)M(842)O(837).
    840.427/2-   E(level): 1/2[521] band.
    849.311/2+,13/2+   Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
    887.935/2-   E(level): 1/2[530] band; α=5.6, a=-0.10.
    964(9/2-)   XREF: E(967)J(965)M(961)O(962).
E(level): 1/2[530] band; α=5.6, a=-0.10.
    981(9/2-)   E(level): 1/2[521] band.
   1002.5319/2- 1.81 ps 16  E(level): 3/2[521] band; α=10.82, B=0.0068.
   1060(11/2-)   E(level): 1/2[530] band; α=5.6, a=-0.10.
   1184.5   XREF: E(1178)O(1175).
   1185.6221/2- 1.15 ps 17  E(level): 3/2[521] band; α=10.82, B=0.0068.
   1231.505/2+,7/2,9/2+   XREF: M(1227).
   1349.131/2-   XREF: J(1354)O(1352).
   1393(7/2-)   XREF: J(1391)O(1396).
E(level): 5/2[512] expected bandhead (only first (7/2-) level known).
   1399.3   XREF: M(1403).
   1423.923/2- 0.60 ps 5  E(level): 3/2[521] band; α=10.82, B=0.0068.
   1437.2   XREF: M(1433).
E(level)Jπ(level)T1/2(level)Comments
   1552.25/2+   E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ).
Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
   1589.681/2,3/2   XREF: J(1593).
   1589.83/2+,5/2+   Possibly same level as 1589.7.
E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ).
Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
   1623.125/2-   E(level): 3/2[521] band; α=10.82, B=0.0068.
   1667.58(1/2,3/2)-   XREF: O(1670).
   1735.65/2+   E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ).
Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
   1736.41/2-,3/2-   XREF: O(1731).
   18257/2+   E(level): 7/2[404] bandhead.
   1825.65/2+   E(level): Any of the 1552, 1589, 1735 or 1825 levels is a possible candidate for ν5/2[402] configuration (2014Ro25, 158Gd(p,dγ).
Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
   1836.21/2-,3/2-   XREF: J(1833).
   1896.361/2+,3/2+   XREF: E(1899).
   1905.9(11/2-)   Configuration=ν9/2[514] (2014Ro25).
Jπ(level): from angular distribution of the deuterons in coincidence with γ rays in 158Gd(p,dγ) (2014Ro25).
   1906.1   Possiblysame level as 1905.9.
   1997.31/2+,3/2+   XREF: E(2004).

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Additional Gamma Comments:

E(level)E(gamma)Comments
    131.451    131.438I(γ): From Coulomb excitation. Others: 28 7 from 157Eu β- decay, 8 4 from IT decay, and 44 6 from (n,γ) resonance.
    226.983    172.37E(γ): Poor energy fit; level energy difference is 172.78.. Differ by 3σ or more from calculated value
I(γ): From Coulomb excitation; other: 73 13 from IT decay and 150 8 from (n,n’γ). Coulomb excitation: 92 4
    347.05    120.1I(γ): From Coulomb excitation; other: 62 3 from (n,n’γ).
    434.426    318.710I(γ): From 157Eu β- decay (1986GrZS); other: 188 25 from Coulomb excitation, 44.8 17 from (n,γ) resonance, 31.4 17 from (n,n’γ) and 43 3 from (n,γ) E=th.
    379.905I(γ): From 157Eu β- decay (1986GrZS); other: 15.6 12 Coulomb excitation and 7.7 12 from (n,n’γ).
    434.388I(γ): From 157Eu β- decay (1986GrZS); other: 9.4 12 Coulomb excitation, and 3.20 20 from (n,n’γ) .
    514.671    450.761I(γ): From 157Eu β- decay (1986GrZS); other: Coulomb excitation value is 30 8, 99 5 from (n,n’γ), and 118 17 from (n,γ) E=resonance.
    524.847    344.61I(γ): From 157Eu β- decay (1986GrZS); other: 3.78 22 from (n,n’γ).
    460.923I(γ): From 157Eu β- decay (1986GrZS); other: 36.1 17 from (n,γ) E=thermal, 36.4 24 from (n,γ) E=resonance, 30.0 16 from (n,n’γ).
    470.389E(γ): Differ by 3σ or more from calculated value
    524.835I(γ): From 157Eu β- decay (1986GrZS); other: 11.0 15 from (n,γ) E=thermal, 7.9 4 from (n,n’γ), 7.4 22 from (n,γ) E=resonance.
    607.589    380.38E(γ): Differ by 3σ or more from calculated value
    491.89I(γ): From 157Eu β- decay (1986GrZS); other: 22.9 16 from (n,n’γ), 62 4 from (n,γ) E=thermal, and 42 8 from (n,γ) E=resonance.
    543.93E(γ): Differ by 3σ or more from calculated value
I(γ): other: 21~4 (157Eu β- decay)
    553.02I(γ): other: 22~4 (157Eu β- decay)
    640.33    131.3M(γ): From coulex dataset
    279.4M(γ): From coulex dataset
    683.236    208.621I(γ): may include transition from 1/2+ level at 682.8 keV
    567.58I(γ): From 157Eu β- decay (1986GrZS); other: 8.3 10 from (n,n’γ), 5.9 18 from (n,γ) E=thermal, and 7.8 14 from (n,γ) E=resonance.
    619.303I(γ): may include transition from 1/2+ level at 682.8 keV
    683.162I(γ): may include transition from 1/2+ level at 682.8 keV
    686.667    161.820I(γ): from 157Eu β- decay; other: 3.4 8 from 156Gd(n,γ) E=resonance and 7.1 11 from 157Gd(n,n’γ).
    622.751I(γ): from 157Eu β- decay; other: 68 6 from 156Gd(n,γ) E=resonance and 48.9 25 from 157Gd(n,n’γ).
    701.39    638E(γ): Placement requires M2 character, so placement is doubtful.
    729.23    613.73E(γ): Placement requires M2 character, so placement is doubtful. Also 2014Ro25 ((158Gd(p,dγ)) did not observe 614γ
E(level)E(gamma)Comments
    751.436    635.75I(γ): from 157Eu β- decay; other: 8.5 8 from 156Gd(n,γ) E=thermal and 4.6 3 from 157Gd(n,n’γ).
    762.670    238.49E(γ): Differ by 3σ or more from calculated value
    771.302    543.93E(γ): Differ by 3σ or more from calculated value
    707.46I(γ): from 157Eu β- decay; other: 57 9 from 156Gd(n,γ) E=thermal and 28.3 18 from 157Gd(n,n’γ).
    788.54    657.07I(γ): from 157Gd(n,n’γ); other: 80 8 from 156Gd(n,γ) E=thermal.
    793.67    358.92I(γ): from 156Gd(n,γ) E=resonance; other: 17.2 13 from 157Gd(n,n’γ).
    739.10I(γ): from 156Gd(n,γ) E=resonance; other: 35 4 from 157Gd(n,n’γ) and 8.3 5 from 156Gd(n,γ) E=thermal
    809.13    284.26E(γ): average of 284.09~23 (156Gd(n,γ) E=resonance) and 284.44~11 (157Gd(n,n’γ))
I(γ): from 156Gd(n,γ) E=resonance; other: 14.3 7 from 157Gd(n,n’γ) and 8 6 from 156Gd(n,γ) E=thermal
    334.36I(γ): from 156Gd(n,γ) E=resonance; other: 74 4 from 157Gd(n,n’γ) and 9.2 17 from 156Gd(n,γ) E=thermal
    809.25I(γ): from 156Gd(n,γ) E=resonance; other: 23.3 13 from 157Gd(n,n’γ) and 24.0 5 from 156Gd(n,γ) E=thermal
    814.11    339.19I(γ): from 157Gd(n,n’γ); other: 44 8 from 156Gd(n,γ) E=thermal and 13 7 from 157Eu β- decay.
    682.60I(γ): from 157Eu β- decay relative to Iγ of 698.
    698.51E(γ): weighted average of: 698.30~9 (156Gd(n,γ) E=th), 698.32~10 (157Gd(n,n’γ)), 698.59~16 (156Gd(n,γ) E=resonance), and 698.62~5 (157Eu β- decay)
I(γ): from 157Gd(n,n’γ); other: 77 6 from 156Gd(n,γ) E=thermal.
    759.75I(γ): from 157Gd(n,n’γ); other: 54 5 from 156Gd(n,γ) E=thermal.
    816.50    685.14I(γ): from 157Gd(n,n’γ); other: 24 4 from 156Gd(n,γ) E=thermal.
    816.50I(γ): from 157Gd(n,n’γ); other: 25.8 19 from 156Gd(n,γ) E=thermal.
    816.574    762.7E(γ): Multiply placed with intensity suitably divided
I(γ): Multiply placed with intensity suitably divided
    840.42    613.10E(γ): weighted average of: 612.94~22 (156Gd(n,γ) E=th) and 613.20~21 (157Gd(n,n’γ))
I(γ): from 157Gd(n,n’γ); other: 39 8 from 156Gd(n,γ) E=thermal.
    840.9E(γ): average of: 840.68~9 (157Gd(n,n’γ)) and 841.06~9 (156Gd(n,γ) E=th)
    919.31    647.65E(γ): average of: 647.57~17 (157Gd(n,n’γ)) and 647.75~19 (156Gd(n,γ) E=th). Differ by 3σ or more from calculated value
I(γ): from 157Gd(n,n’γ); other: 69 12 from 156Gd(n,γ) E=thermal.
    803.35E(γ): Differ by 3σ or more from calculated value
    865.28E(γ): weighted average of: 865.05~20 (157Eu β- decay), 865.22~5 (157Gd(n,n’γ)), and 865.48~8 (156Gd(n,γ) E=th). Differ by 3σ or more from calculated value
   1002.53    171.3M(γ): From coulex dataset
   1049.68    934.24E(γ): Differ by 3σ or more from calculated value
I(γ): from 157Gd(n,n’γ); other: 27 7 from 157Eu β- decay.
   1059.67    584.92I(γ): from 156Gd(n,γ) E=thermal; other: 44 5 from 157Gd(n,n’γ)
E(level)E(gamma)Comments
   1247.20    560.1I(γ): from 156Gd(n,γ) E=thermal; other: 34 9 from 156Gd(n,γ) E=resonance relative to 722 γ.

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