ADOPTED LEVELS, GAMMAS for 156Nd

Author: C. W. Reich |  Citation: Nucl. Data Sheets 113, 2537 (2012) |  Cutoff date: 1-Mar-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=3.69×103 keV 20S(n)= 6.26×103 keV 20S(p)= 1.235×104 keV 20Q(α)= -3918 keV 283
S(2n)= 1.079×104 keV 20S(2p)= 22832 keV 20
Reference: 2017WA10

References:
  A  248Cm,252Cf SF decay 

General Comments:

All the data on the excited states are from the SF decay studies.

Levels: 2000Ma42 give theoretical values for the g-factor ratios [g(J)/g(2+)] for the Jπ=4+ through 10+ members of the g.s. band. This author also gives experimental values for these ratios but gives no reference to the source of them. Some seem questionable; and the evaluator has chosen not to list them here.










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0A 0+ 5.26 s 20 
% β- = 100
     
    67.2 2 A 2+       67.2 2 
  100

     0
0+
   222.2 3 A 4+      155.0 2 
  100

    67.2
2+
   460.7 4 A 6+      238.6 2 
  100

   222.2
4+
   778.2 4 A 8+      317.5 2 
  100

   460.7
6+
  1169.0 5 A 10+      390.8 2 
  100

   778.2
8+
  1431.3 4 A (5-) 0.36 µs 15     970.6 2 
  1209.0 2 
  100 10 
   70 15 
[E1]
[E1]
   460.7
   222.2
6+
4+
  1531.9 4 A (6-)      100.4 2 
  100

  1431.3
(5-)
  1628.4 5 A 12+ 2.4 ps    459.4 2 
  100
[E2]
  1169.0
10+
  1649.4 4 A (7-)      117.5 2 
   218.4 2 
  100 18 
   91


  1531.9
  1431.3
(6-)
(5-)
  1783.7 4 A (8-)      134.3 2 
   251.5 2 
  100 17 
   83


  1649.4
  1531.9
(7-)
(6-)
  1934.5 4 A (9-)      151.0 2 
   285.3 2 
  100 18 
   62


  1783.7
  1649.4
(8-)
(7-)
  2101.9 4 A (10-)      167.5 2 
   317.8 2 
  100 22 
  100


  1934.5
  1783.7
(9-)
(8-)
  2151.6 6 A 14+ 1.2 ps    523.2 2 
  100
[E2]
  1628.4
12+
  2286.2 4 A (11-)      184.1 2 
   351.9 2 
   80 26 
  100


  2101.9
  1934.5
(10-)
(9-)
  2485.1 5 A (12-)      199.0 2 
   383.2 2 
   70 29 
  100


  2286.2
  2101.9
(11-)
(10-)
  2713.0 5 A (13-)      227.7 2 ?
   426.8 2 
   30 18 
  100


  2485.1
  2286.2
(12-)
(11-)
  2737.0A 16+ 0.76 ps    585.4
  100
[E2]
  2151.6
14+

E(level): From a least-squares fit by the evaluator to the listed Eγ values.

Jπ(level): Values are deduced from the considerations given in the SF-Decay data set.

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

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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+, g.s. band. α=11.24~keV, β=-6.7 eV
     0 0+ 5.26 s 20 
% β- = 100
     
    67.2 2  2+       67.2 2 
  100

     0
0+
   222.2 3  4+      155.0 2 
  100

    67.2
2+
   460.7 4  6+      238.6 2 
  100

   222.2
4+
   778.2 4  8+      317.5 2 
  100

   460.7
6+
  1169.0 5  10+      390.8 2 
  100

   778.2
8+
  1628.4 5  12+ 2.4 ps    459.4 2 
  100
[E2]
  1169.0
10+
  2151.6 6  14+ 1.2 ps    523.2 2 
  100
[E2]
  1628.4
12+
  2737.0 16+ 0.76 ps    585.4
  100
[E2]
  2151.6
14+
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Kπ=(5-) band, α=1 branch. Probable
  1431.3 4  (5-) 0.36 µs 15       
  1649.4 4  (7-)      117.5 2 
   218.4 2 
  100 18 
   91


  1531.9
  1431.3
(6-)
(5-)
  1934.5 4  (9-)      151.0 2 
   285.3 2 
  100 18 
   62


  1783.7
  1649.4
(8-)
(7-)
  2286.2 4  (11-)      184.1 2 
   351.9 2 
   80 26 
  100


  2101.9
  1934.5
(10-)
(9-)
  2713.0 5  (13-)      227.7 2 ?
   426.8 2 
   30 18 
  100


  2485.1
  2286.2
(12-)
(11-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - Kπ=(5-) band, α=0 branch. Probable
  1531.9 4  (6-)        
  1783.7 4  (8-)      134.3 2 
   251.5 2 
  100 17 
   83


  1649.4
  1531.9
(7-)
(6-)
  2101.9 4  (10-)      167.5 2 
   317.8 2 
  100 22 
  100


  1934.5
  1783.7
(9-)
(8-)
  2485.1 5  (12-)      199.0 2 
   383.2 2 
   70 29 
  100


  2286.2
  2101.9
(11-)
(10-)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
  1431.3 (5-) 0.36 µs 15     970.6 2 [E1]B(E1)(W.u.)=4.2E-10 19
(5-) 0.36 µs 15    1209.0 2 [E1]B(E1)(W.u.)=1.5E-10 8
  1628.4 12+ 2.4 ps    459.4 2 [E2]0.0149B(E2)(W.u.)=227.6, α=0.0149
  2151.6 14+ 1.2 ps    523.2 2 [E2]0.0105B(E2)(W.u.)=238.6, α=0.0105
  2737.0 16+ 0.76 ps    585.4[E2]0.0079B(E2)(W.u.)=215.4, α=0.0079

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 5.26 s 20 
% β- = 100
E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
    67.22+   E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
   222.24+   E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
   460.76+   E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
   778.28+   E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
  1169.010+   E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
  1431.3(5-) 0.36 µs 15  E(level): Kπ=(5-) band, α=1 branch. Probable.
  1531.9(6-)   E(level): Kπ=(5-) band, α=0 branch. Probable.
  1628.412+ 2.4 ps E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
  1649.4(7-)   E(level): Kπ=(5-) band, α=1 branch. Probable.
  1783.7(8-)   E(level): Kπ=(5-) band, α=0 branch. Probable.
  1934.5(9-)   E(level): Kπ=(5-) band, α=1 branch. Probable.
  2101.9(10-)   E(level): Kπ=(5-) band, α=0 branch. Probable.
  2151.614+ 1.2 ps E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.
  2286.2(11-)   E(level): Kπ=(5-) band, α=1 branch. Probable.
  2485.1(12-)   E(level): Kπ=(5-) band, α=0 branch. Probable.
  2713.0(13-)   E(level): Kπ=(5-) band, α=1 branch. Probable.
  2737.016+ 0.76 ps E(level): Kπ=0+, g.s. band. α=11.24~keV, β=-6.7 eV.

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