ADOPTED LEVELS, GAMMAS for 138La

Author: Jun Chen |  Citation: Nucl. Data Sheets 146, 1 (2017) |  Cutoff date: 30-Sep-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1052 keV 4S(n)= 7450 keV 4S(p)= 6087 keV 3Q(α)= -2053 keV 3
Reference: 2017WA10

References:
  A  137Ba(3He,d)  B  137Ba(α,t)
  C  138Ba(p,nγ)  D  139La(p,d)
  E  139La(d,t)  F  140Ce(d,α)
  G  238U(12C,Fγ) 

General Comments:

First identification of 138La nuclide by Inghram et al.: Phys Rev 72, (1947) 967.

Other measurements:

2015Kh02: 139La(3He,X) E=38 MeV. Measured Eγ, Iγ. Deduced γ-ray strength functions, level densities.

2007By02: 138Ba(3He,t) E=420 MeV. Measured triton spectra. Deduced Gamow-Teller strength distributions. Total B(>)=5.8 16 up to the neutron threshold.

Theoretical calculations:

2014Ac01: calculated ground state and excited state magnetic moments

2009Ka16: calculated hyperfine structure

2008Ha20: calculated levels, J, π.

Q-value: S(2n)=16620 50, S(2p)=14758 4 (2017Wa10)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABCDEFG 5+ 1.03×10+11 y 1 
% β- = 34.5 4
% ε = 65.5 4
     
    72.57 3 ABCDEF  (3)+ 116 ns 5      72.57 3 
   100
(E2)
     0.0
5+
   116.17 6 ABCDEF  (2)+       43.6 1 
   100

    72.57
(3)+
   161.19 6 ABCDEF  (3)+       45.0 1 
    88.62 5 
    13 5 
   100 8 


   116.17
    72.57
(2)+
(3)+
   192.18 5 ABCDE   (2,3)+       76.01 8 
   119.64 5 
   100 9 
    41 3 


   116.17
    72.57
(2)+
(3)+
   230.40 7 ABCDEF  (4)+      157.8 1 
   230.4 2 
     4.6 6 
   100 9 


    72.57
     0.0
(3)+
5+
   292.96 7 ABC  F  (1)+      100.78 6 
   176.83 6 
    22 2 
   100


   192.18
   116.17
(2,3)+
(2)+
   413.30 6 ABCDEF  3+,4+      182.9 1 
   221.13 5 
   297.2 3 
   340.78 20 
     4.4 5 
    34 3 
     8.4 8 
   100 8 




   230.40
   192.18
   116.17
    72.57
(4)+
(2,3)+
(2)+
(3)+
   479.25 13 ABCDEF  3+,4+      248.7 2 
   406.8 2 
   479.3 3 
     7.7 8 
   100 8 
    21 3 



   230.40
    72.57
     0.0
(4)+
(3)+
5+
   510.44 6  BC EF  3+,4+      280.0 1 
   318.3 1 
   394.3 1 
   437.9 1 
     7.7 16 
    98 7 
    43 4 
   100 9 




   230.40
   192.18
   116.17
    72.57
(4)+
(2,3)+
(2)+
(3)+
   518.68 15 ABCDE   3+,4+      357.6 2 
   445.9 3 
   518.5 4 
    17 2 
   100 9 
    15 2 



   161.19
    72.57
     0.0
(3)+
(3)+
5+
   642.35 9 ABC  F  (2)+      131.9 1 
   229.3 2 
   450.2 2 
   481.0 3 
   526.2 3 
   569.5 2 
     9.7 9 
    43 4 
    33 3 
   100 15 
    11.8 9 
    58 6 






   510.44
   413.30
   192.18
   161.19
   116.17
    72.57
3+,4+
3+,4+
(2,3)+
(3)+
(2)+
(3)+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   737.67 9   C E   (2)-      227.3 1 
   324.4 2 
   444.7 3 
   545.4 2 
   576.4 2 
    25 2 
     6.0 6 
    49 5 
    23 2 
   100 8 





   510.44
   413.30
   292.96
   192.18
   161.19
3+,4+
3+,4+
(1)+
(2,3)+
(3)+
   738.80 20   C EFG (7)- 2.0 µs 3 
% IT = 100
   738.8 2 
   100
(M2)
     0.0
5+
   770.5?     F         
   823.33 12   C EF  (1,2,3)-       85.68 8 
   100

   737.67
(2)-
   836.6 6     E G (8-)       97.8 5 
 

   738.80
(7)-
   842.79 16   C  F       612.7 4 
   842.7 2 
    19 3 
   100 9 


   230.40
     0.0
(4)+
5+
   888 2     E          
   900.5 3   C EF  (4,5)-      670.0 3 
   900.8 5 
    56 7 
   100 10 


   230.40
     0.0
(4)+
5+
   915.3?     F         
   929 3     E          
   936.30 19   C EF  (4,5)-      706.5 5 
   936.2 2 
   100 10 
  ≤233


   230.40
     0.0
(4)+
5+
   947.79 17   C          105.0 1 
   717.4 3 
    28 3 
   100 10 


   842.79
   230.40

(4)+
   961.4 5   C EF  (4,5,6)-      961.4 5 
   100

     0.0
5+
  1033 2     E          
  1057.77 16 ABC     1+,2+      765.0 3 
   865.6 3 
   941.3 3 
   985.3 3 
    36 4 
    33 3 
   ≤45
   100 9 




   292.96
   192.18
   116.17
    72.57
(1)+
(2,3)+
(2)+
(3)+
  1067 2     E   (7,8)-        
  1096 2 A   E   1+,2+        
  1102.54 22   C E        910.4 3 
   941.3 3 
   100 10 
   ≤94


   192.18
   161.19
(2,3)+
(3)+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1150 3 AB  E          
  1155 5 AB  E          
  1178 5 A       1+,2+        
  1200.3 3   C E        681.5 3 
  1200.5 5 
   100 10 
    78 13 


   518.68
     0.0
3+,4+
5+
  1228.87 16 A C E   1+,2+      936.2 2 
  1067.5 3 
  1112.2 3 
  ≤127
    92 9 
   100 9 



   292.96
   161.19
   116.17
(1)+
(3)+
(2)+
  1243.0 3 ABC     (4,5,6)-      295.2 3 
  1243.0 5 
   100 9 
    89 21 


   947.79
     0.0

5+
  1257.0 7     E G (9)-      420.3 4 
   100

   836.6
(8-)
  1267 1 AB      -        
  1302 2     E          
  1344 3     E          
  1358.8 3 ABC     1+,2+      535.5 3 
   621.0 4 
    34 9 
   100 18 


   823.33
   737.67
(1,2,3)-
(2)-
  1375 2     E          
  1385.1 3   C E        874.6 3 
   971.8 5 
   100 11 
   ≤57


   510.44
   413.30
3+,4+
3+,4+
  1425 2 AB  E   1+,2+        
  1455 2 AB      1+,2+        
  1466 2     E          
  1490.5 3   C E        971.8 5 
  1077.2 3 
   ≤27
   100 10 


   518.68
   413.30
3+,4+
3+,4+
  1520 3     E          
  1531 2 AB      1+,2+        
  1545 3     E          
  1570 2 AB  E   1+,2+        
  1581 2 AB  E   -        
  1599 2     E          
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  1624 4 AB      1+,2+        
  1645 2 AB  E   -        
  1656 3     E          
  1676 3     E          
  1687 2 AB  E   1+,2+        
  1707 2     E          
  1713 2 AB      +        
  1722.4 4   C         1309.1 5 
  1429.5 5 
 
 


   413.30
   292.96
3+,4+
(1)+
  1733.45 23 ABC E   1+,2+      910.4 3 
  1090.8 3 
  ≤122
   100 10 


   823.33
   642.35
(1,2,3)-
(2)+
  1739 2     E          
  1756 4 AB      +        
  1788.4 4 ABC E   +      827.0 6 
  1270 1 
  1309.1 5 
    90 14 
   100 17 
  ≤124



   961.4
   518.68
   479.25
(4,5,6)-
3+,4+
3+,4+
  2001.6 6       G (10-)      744.6 3 
  1165.0 3 
    25 6 
   100 13 


  1257.0
   836.6
(9)-
(8-)
  2352.8 7       G (11-)      351.2 3 
   100

  2001.6
(10-)
  2476.2 8       G (12-)      123.4 3 
   100
M1
  2352.8
(11-)
  2938.6 9       G (13-)      462.4 4 
   100

  2476.2
(12-)
  3190.0 9       G (14-)      251.4 3 
   100

  2938.6
(13-)
  3514.8 9       G (13+)     1038.6 5 
   100

  2476.2
(12-)
  3574.5 9       G (14-)     1098.3 5 
   100

  2476.2
(12-)
  3725.8 10       G (14+)      211.0 3 
   100

  3514.8
(13+)
  3771.7 10       G (14+)      256.9 4 
   100

  3514.8
(13+)
  3960.8 10       G (15+)      235.0 3 
   100

  3725.8
(14+)
  4099.1 10       G (15-)     1160.6 5 
   100

  2938.6
(13-)
  4152.5 11       G (15+)      380.8 5 
   100

  3771.7
(14+)
  4467.9 10       G (16-)      368.8 5 
  1277.8 5 
    67 33 
   100 50 


  4099.1
  3190.0
(15-)
(14-)

E(level): From a least-squares fit to γ-ray energies where applicable, unless otherwise noted.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - γ cascade based on 7-.
   738.80 20  (7)- 2.0 µs 3 
% IT = 100
     
   836.6 6  (8-)       97.8 5 
 

   738.80
(7)-
  1257.0 7  (9)-      420.3 4 
   100

   836.6
(8-)
  2001.6 6  (10-)      744.6 3 
  1165.0 3 
    25 6 
   100 13 


  1257.0
   836.6
(9)-
(8-)
  2352.8 7  (11-)      351.2 3 
   100

  2001.6
(10-)
  2476.2 8  (12-)      123.4 3 
   100
M1
  2352.8
(11-)
  2938.6 9  (13-)      462.4 4 
   100

  2476.2
(12-)
  3190.0 9  (14-)      251.4 3 
   100

  2938.6
(13-)
  4467.9 10  (16-)      368.8 5 
  1277.8 5 
    67 33 
   100 50 


  4099.1
  3190.0
(15-)
(14-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - γ cascade based on (13+)
  3514.8 9  (13+)        
  3771.7 10  (14+)      256.9 4 
   100

  3514.8
(13+)
  4152.5 11  (15+)      380.8 5 
   100

  3771.7
(14+)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    72.57 (3)+ 116 ns 5      72.57 3 (E2)6.33B(E2)(W.u.)=7.8 4, α=6.33, α(K)=3.00 5, α(L)=2.61 4, α(M)=0.581 9, α(N)=0.1229 18, α(O)=0.01723 25, α(P)=0.0001543 22
   738.80 (7)- 2.0 µs 3 
% IT = 100
   738.8 2 (M2)0.01513B(M2)(W.u.)=0.0026 +5-4, α=0.01513, α(K)=0.01288 18, α(L)=0.001781 25, α(M)=0.000372 6, α(N)=8.18×10-5 12, α(O)=1.331E-5 19, α(P)=1.037E-6 15
  2476.2 (12-)      123.4 3 M10.595α=0.595, α(K)=0.509 8, α(L)=0.0687 11, α(M)=0.01429 23, α(N)=0.00314 5, α(O)=0.000511 8, α(P)=3.96×10-5 7

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.05+ 1.03×10+11 y 1 
% β- = 34.5 4
% ε = 65.5 4
μ=+3.713646 7 (1977Kr12,2014StZZ), Q=+0.39 3 (2003Ii03,2016St14)
With the Adopted value of T1/2, the deduced |lβ-=(2.34 4)×10-12y-1, compared with the measured value |lβ-=(2.37 10)×10-12y-1 from 2000Ta24, obtained using a geophysical method.
E(level): With the Adopted value of T1/2, the deduced |lβ-=(2.34 4)×10-12y-1, compared with the measured value |lβ-=(2.37 10)×10-12y-1 from 2000Ta24, obtained using a geophysical method.
    72.57(3)+ 116 ns 5  μ=+2.89 5 (1979Bo11,2014StZZ)
Configuration=πg7/2~#νd3/2 (1975IsZY).
   479.253+,4+   XREF: d(493).
   518.683+,4+   XREF: d(530).
   738.80(7)- 2.0 µs 3 
% IT = 100
E(level): γ cascade based on 7-.
   836.6(8-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  1257.0(9)-   E(level): γ cascade based on 7-.
  1733.451+,2+   XREF: B(1728)E(1726).
  2001.6(10-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  2352.8(11-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  2476.2(12-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  2938.6(13-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3190.0(14-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3514.8(13+)   E(level): γ cascade based on (13+).
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3574.5(14-)   Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3725.8(14+)   Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3771.7(14+)   E(level): γ cascade based on (13+).
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  3960.8(15+)   Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  4099.1(15-)   Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  4152.5(15+)   E(level): γ cascade based on (13+).
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.
  4467.9(16-)   E(level): γ cascade based on 7-.
Jπ(level): Proposed by 2014As02 in (12C,Fγ) based on band structures and comparisons with shell-model predictions.

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Additional Gamma Comments:

E(level)E(gamma)Comments
    72.57    72.57M(γ): from 1975We16 in (p,nγ) based on RUL. Mult=M1 would require a half-life less than 0.1 ns.
   738.80   738.8E(γ): weighted average of 738.8 2 from (p,nγ) and 739.2 5 from (12C,Fγ).
M(γ): proposed by 2014As02 in (12C,Fγ) based on transition energy and T1/2
   836.6    97.8E(γ): From (12C,Fγ)
  1257.0   420.3E(γ): From (12C,Fγ)
  2001.6   744.6E(γ): From (12C,Fγ)
I(γ): From (12C,Fγ)
  1165.0E(γ): From (12C,Fγ)
I(γ): From (12C,Fγ)
  2352.8   351.2E(γ): From (12C,Fγ)
  2476.2   123.4E(γ): From (12C,Fγ)
M(γ): from (12C,Fγ) based on measured α(exp)=0.5 2 (2014As02)
  2938.6   462.4E(γ): From (12C,Fγ)
  3190.0   251.4E(γ): From (12C,Fγ)
  3514.8  1038.6E(γ): From (12C,Fγ)
  3574.5  1098.3E(γ): From (12C,Fγ)
  3725.8   211.0E(γ): From (12C,Fγ)
  3771.7   256.9E(γ): From (12C,Fγ)
  3960.8   235.0E(γ): From (12C,Fγ)
  4099.1  1160.6E(γ): From (12C,Fγ)
  4152.5   380.8E(γ): From (12C,Fγ)
  4467.9   368.8E(γ): From (12C,Fγ)
I(γ): From (12C,Fγ)
  1277.8E(γ): From (12C,Fγ)
I(γ): From (12C,Fγ)

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