ADOPTED LEVELS, GAMMAS for 154Yb

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-)=-10217 keV 197S(n)= 10795 keV 196S(p)= 3248 keV 21Q(α)= 5474.3 keV 17
S(2n)= 1.980×104 keV 196S(2p)= 4010 keV 21Q(EC)= 4495 keV 14Q(ECp)= 3248 keV 20
Reference: 2017WA10

References:
  A  158Hf α decay  B  106Cd(54Fe,α2pγ)
  C  154Lu ε decay 

General Comments:

The information on 154Yb comes primarily from the study of the 154Lu ε decay (1988Vi02) and the in-beam studies (1993Zh10 and 1996Zh09). These latter studies make extensive use of multiparticle shell-model calculations to elucidate the properties of the 154Yb levels.

Levels: α-particle emission from excited levels between 3 and 6 MeV in 154Yb populated in the 154Lu ε decay has been reported by 1988Vi02. In addition, these authors report proton emission from 154Yb states between 6.5 and 9 MeV excitation energy. They measure Iα=0.03% and Ip=0.06%. These values were determined from the measured α and proton intensities, respectively, relative to Iγ(821.3)(1+α), which they assume represents 100% of the 154Lu decays.










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0ABC 0+ 0.409 s 2 
% ε = 7.4 12
% α = 92.6 12
     
   821.3 2  BC (2+)      821.3 2 
  100
[E2]
     0
0+
  1516.0 3  BC (4+)      694.7 2 
  100
[E2]
   821.3
(2+)
  1949.6 4  BC (6+)      433.6 2 
  100
[E2]
  1516.0
(4+)
  2046.2 4  BC (8+) 28 ns 2      96.6 2 
  100
E2
  1949.6
(6+)
  2914.7 B  (10+)      868.5
  100

  2046.2
(8+)
  3228.5 B  (11-)      313.8
  100

  2914.7
(10+)
  3696.4 B  (12+)      781.7
  100

  2914.7
(10+)
  4318.8 B  (14+)      622.4
  100

  3696.4
(12+)
  4479.1 B  (16+) 18.6 ns 15     160.3
  100
E2
  4318.8
(14+)
  4608.2 B  (16+)      129.1
  100

  4479.1
(16+)
  4996.1 B  (17+)      517.0
  100

  4479.1
(16+)
  5178.0 B  (18+)      181.8
   698.9
 
 
M1

  4996.1
  4479.1
(17+)
(16+)
  5370.1 B       374.0
  100

  4996.1
(17+)
  5382.8 B       903.7
  100

  4479.1
(16+)
  5517.5 B       339.5
  100

  5178.0
(18+)
  5537.2 B      1058.1
  100

  4479.1
(16+)
  5738.2 B       560.2
  100

  5178.0
(18+)
  5878.1 B       139.9
  100

  5738.2

  6178.2 B       300.1
  100

  5878.1

  6283.3 B  (20+)      545.1
  100

  5738.2

  6342.9 B  (20)      604.7
  100

  5738.2

  6666.3 B       323.4
   383.0
 
 


  6342.9
  6283.3
(20)
(20+)
  6796.5 B  (21+)      513.2
  100

  6283.3
(20+)
  6984.5 B  (22+)      188.0
   318.3
 
 


  6796.5
  6666.3
(21+)

E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  7187.2 B  (22)      390.7
  100

  6796.5
(21+)
  7245.9 B       579.6
  100

  6666.3

  7439.6 B      1156.3
  100

  6283.3
(20+)
  7609.9 B  (24)      625.4
  100

  6984.5
(22+)

E(level): Computed from the listed γ-ray energies.

Jπ(level): The values given here are plausible and not inconsistent with the available data, but they are based largely on considerations of systematics. See, also, the comment on the Jπ values in the 106Cd(54Fe,α2pγ) data set.

E(γ): From 1993Zh10 in 106Cd(54Fe,α2pγ), unless noted otherwise.

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
  1949.6 (6+)      433.6 2 [E2]0.0259α=0.0259
  2046.2 (8+) 28 ns 2      96.6 2 E23.67B(E2)(W.u.)=10.5 8, α=3.67
  4479.1 (16+) 18.6 ns 15     160.3E20.571B(E2)(W.u.)=3.7 4, α=0.571
  5178.0 (18+)      181.8M10.620α=0.620

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 0.409 s 2 
% ε = 7.4 12
% α = 92.6 12
Δ<r2>(152Yb-154Yb)=0.357 fm2 67 and Δ<r2>(154Yb-156Yb)=0.274 fm2 60 (from tabulation in 1994Ma57 and based on data of 1989Sp04 which is only reported in plots); others: see graphs of 1989Sp04 and 1991Ho22. From an evaluation of data on nuclear rms charge radii, 2004An14 report <r2>1/2=5.079~fm~13.
E(level): Δ<r2>(152Yb-154Yb)=0.357 fm2 67 and Δ<r2>(154Yb-156Yb)=0.274 fm2 60 (from tabulation in 1994Ma57 and based on data of 1989Sp04 which is only reported in plots); others: see graphs of 1989Sp04 and 1991Ho22. From an evaluation of data on nuclear rms charge radii, 2004An14 report <r2>1/2=5.079~fm~13.
Jπ(level): yrast sequence of positive-parity levels. Configuration=((π,h11/26)(ν,f7/22)).
   821.3(2+)   Jπ(level): yrast sequence of positive-parity levels. Configuration=((π,h11/26)(ν,f7/22)).
  1516.0(4+)   Jπ(level): yrast sequence of positive-parity levels. Configuration=((π,h11/26)(ν,f7/22)).
  1949.6(6+)   Jπ(level): yrast sequence of positive-parity levels. Configuration=((π,h11/26)(ν,f7/22)).
  2046.2(8+) 28 ns 2  Jπ(level): yrast sequence of positive-parity levels. Configuration=((π,h11/26)(ν,h9/2)(ν,f7/2)).
  2914.7(10+)   Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,f7/22)).
  3696.4(12+)   Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,f7/22)).
  4318.8(14+)   Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,f7/22)).
  4479.1(16+) 18.6 ns 15  Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,h9/2)(ν,f7/2)).
  4608.2(16+)   Jπ(level): Configuration= ((π,h11/240+)(π,h11/2210+)(ν,f7/22)).
  4996.1(17+)   Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,h9/2)(ν,f7/2)).
  5178.0(18+)   Jπ(level): yrast sequence of positive-parity levels. Configuration= ((π,h11/240+)(π,h11/2210+)(ν,h9/2)(ν,f7/2)).
  6283.3(20+)   Jπ(level): yrast sequence of positive-parity levels.
  6796.5(21+)   Jπ(level): yrast sequence of positive-parity levels.
  6984.5(22+)   Jπ(level): yrast sequence of positive-parity levels.
  7609.9(24)   Jπ(level): yrast sequence of positive-parity levels.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   821.3   821.3E(γ): From 154Lu ε decay (1988Vi02).
  1516.0   694.7E(γ): From 154Lu ε decay (1988Vi02).
  1949.6   433.6E(γ): From 154Lu ε decay (1988Vi02).
  2046.2    96.6E(γ): From 154Lu ε decay (1988Vi02).
M(γ): From αK(exp)=1.3 3 in 154Lu ε decay (1988Vi02).
  4479.1   160.3M(γ): From intensity balance and level T1/2 in 106Cd(54Fe,α2pγ).
  5178.0   181.8M(γ): From 106Cd(54Fe,α2pγ).

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