ADOPTED LEVELS, GAMMAS for 154Nd

Author: C. W. Reich |  Citation: Nucl. Data Sheets 110, 2257 (2009) |  Cutoff date: 1-May-2008 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=2687 keV 25S(n)= 6.57×103 keV 5S(p)= 1.155×104 keV 5Q(α)= -3.40×103 keV 5
S(2n)= 1.182×104 keV 5S(2p)= 21423 keV 5
Reference: 2017WA10

References:
  A  252Cf,248Cm SF decay  B  154Pr β- decay

General Comments:

Theory and model calculations of interest are: on deformation 1981Ca12, 1984Na22, 1985Ca29, and 1987Ne07; on moments 1983Ma03, 1985Ro21, and 1987Ne03; on B(E2) ratios 1985Ca33, 1985Vo08; and on beta-strength functions 1990Mo15.










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0AB 0+ 25.9 s 2 
% β- = 100
     
    70.8 1 AB 2+ 7.7 ns 20      70.8 1 
  100
[E2]
     0
0+
   233.2 1 AB 4+      162.4 1 
  100
[E2]
    70.8
2+
   233.2+X?A  1.3 µs 5       
   481.9A  6+      248.6
  100
[E2]
   233.2
4+
   810.1A  8+      328.2
  100
[E2]
   481.9
6+
   961.6 5  B 1,2+      891.2 10 
   961.8 10 
  100 19 
   48 14 


    70.8
     0
2+
0+
  1003.1 4 AB (2-)      932.3 4 
  100

    70.8
2+
  1027.6 3  B 2+,3,4+      794.3 4 
   956.9 3 
  100 7 
   91 30 


   233.2
    70.8
4+
2+
  1128.4 4 AB (4-)      125.8
   895.1 4 
 
  100


  1003.1
   233.2
(2-)
4+
  1210.8A  10+      400.7
  100
[E2]
   810.1
8+
  1325.8A  (6-)      197.5
   843.8
  100
   57


  1128.4
   481.9
(4-)
6+
  1349A  (5-) > 1 µs    870
  1113
  100
  ≈14


   481.9
   233.2
6+
4+
  1523.9 5  B      520.7 4 
   562.5 4 
   36.1 24 
  100 4 


  1003.1
   961.6
(2-)
1,2+
  1584.1 8  B      581.0 7 
  100

  1003.1
(2-)
  1594.3A  (8-)      268.5
   784.8?
  100
 


  1325.8
   810.1
(6-)
8+
  1677.3A  12+ 1.9 ps    466.5
  100
[E2]
  1210.8
10+
  1932.6A  (10-)      338.3
  100

  1594.3
(8-)
  2194.4 11  B      670.4 9 
  100

  1523.9

  2202.4A  14+ 1.0 ps    525.1
  100
[E2]
  1677.3
12+
  2338.4A  (12-)      405.8
  100

  1932.6
(10-)
  2779.0A  16+ 0.69 ps    576.6
  100
[E2]
  2202.4
14+
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2808.4A  (14-)      470.0
  100

  2338.4
(12-)
  3339.1A  (16-)      530.7
  100

  2808.4
(14-)
  3399.3?A  (18+)      620.4?
  100

  2779.0
16+

E(level): From a least-squares fit to the listed γ energies. Where no uncertainties are given for Eγ, the calculational procedure assumes an uncertainty of 1 keV for the Eγ value. No uncertainty is adopted for the energy of the associated level.

Jπ(level): For the members of the yrast band and the side band, the assignments are based on considerations of the expected band structure and the deexcitation characteristics of spontaneous-fission fragments. Individual arguments are given for levels reported only in the 154Pr β- decay.

T1/2(level): From 1994Sm07 in SF decay, unless noted otherwise.

E(γ): Values given with uncertainties are from 154Pr β- decay. The others are from the SF studies.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Kπ=0+ yrast band
     0 0+ 25.9 s 2 
% β- = 100
     
    70.8 1  2+ 7.7 ns 20      70.8 1 
  100
[E2]
     0
0+
   233.2 1  4+      162.4 1 
  100
[E2]
    70.8
2+
   481.9 6+        
   810.1 8+      328.2
  100
[E2]
   481.9
6+
  1210.8 10+      400.7
  100
[E2]
   810.1
8+
  1677.3 12+ 1.9 ps    466.5
  100
[E2]
  1210.8
10+
  2202.4 14+ 1.0 ps    525.1
  100
[E2]
  1677.3
12+
  2779.0 16+ 0.69 ps    576.6
  100
[E2]
  2202.4
14+
  3399.3 (18+)      620.4?
  100

  2779.0
16+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - side band; probable octupole vibration
  1003.1 4  (2-)        
  1128.4 4  (4-)      125.8
   895.1 4 
 
  100


  1003.1
   233.2
(2-)
4+
  1325.8 (6-)      197.5
   843.8
  100
   57


  1128.4
   481.9
(4-)
6+
  1594.3 (8-)        
  1932.6 (10-)      338.3
  100

  1594.3
(8-)
  2338.4 (12-)      405.8
  100

  1932.6
(10-)
  2808.4 (14-)      470.0
  100

  2338.4
(12-)
  3339.1 (16-)      530.7
  100

  2808.4
(14-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
    70.8 2+ 7.7 ns 20      70.8 1 [E2]7.79B(E2)(W.u.)=95 25, α=7.79
   233.2 4+      162.4 1 [E2]0.398α=0.398
   481.9 6+      248.6[E2]0.0954α=0.0954
   810.1 8+      328.2[E2]0.0397α=0.0397
  1210.8 10+      400.7[E2]0.0219α=0.0219
  1677.3 12+ 1.9 ps    466.5[E2]0.0142B(E2)(W.u.)=2.7×102, α=0.0142 2
  2202.4 14+ 1.0 ps    525.1[E2]0.0103B(E2)(W.u.)=2.9×102, α=0.0103 3
  2779.0 16+ 0.69 ps    576.6[E2]0.00809B(E2)(W.u.)=2.6×102, α=0.00809

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 25.9 s 2 
% β- = 100
E(level): Kπ=0+ yrast band.
    70.82+ 7.7 ns 20  E(level): Kπ=0+ yrast band.
   233.24+   E(level): Kπ=0+ yrast band.
   481.96+   E(level): Kπ=0+ yrast band.
   810.18+   E(level): Kπ=0+ yrast band.
  1003.1(2-)   E(level): side band; probable octupole vibration.
  1128.4(4-)   E(level): side band; probable octupole vibration.
  1210.810+   E(level): Kπ=0+ yrast band.
  1325.8(6-)   E(level): side band; probable octupole vibration.
  1594.3(8-)   E(level): side band; probable octupole vibration.
  1677.312+ 1.9 ps E(level): Kπ=0+ yrast band.
  1932.6(10-)   E(level): side band; probable octupole vibration.
  2202.414+ 1.0 ps E(level): Kπ=0+ yrast band.
  2338.4(12-)   E(level): side band; probable octupole vibration.
  2779.016+ 0.69 ps E(level): Kπ=0+ yrast band.
  2808.4(14-)   E(level): side band; probable octupole vibration.
  3339.1(16-)   E(level): side band; probable octupole vibration.
  3399.3(18+)   E(level): Kπ=0+ yrast band.

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