ADOPTED LEVELS, GAMMAS for 157Hf

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

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-9310 keV 247S(n)= 9158 keV 246S(p)= 2493 keV 203Q(α)= 5880 keV 3
S(2n)= 20876 keV 246S(2p)= 2979 keV 203Q(EC)= 7537 keV 196Q(ECp)= 7074 keV 196
Reference: 2017WA10

References:
  A  161W α decay  B  (HI,xnγ)

General Comments:

2014Ca03 found 6.1 μs 1, 2668 keV isomer in 158Ta. According to 2014Ca03 that searched for proton emission, no proton-decay branch from this isomer was identified, despite the isomer being unbound to proton emission

All data for excited levels and γ’s are from (HI,xnγ)









E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		M(γ)Final Levels
     0.0AB (7/2-) 115 ms 1 
% ε = 14 9
% α = 94 4
    
   111.0 B (9/2-)      111.0
M1
     0.0
(7/2-)
   954.1 B (13/2-)      843.1

   111.0
(9/2-)
  1589.9 B (17/2-)      635.8

   954.1
(13/2-)
  1859.7 B (21/2-)      269.8
E2
  1589.9
(17/2-)
  2294.4 B (23/2-)      434.7

  1859.7
(21/2-)
  2682.3 B (23/2-)      387.9

  2294.4
(23/2-)
  2705.9 B (25/2-)      411.4
   846.2


  2294.4
  1859.7
(23/2-)
(21/2-)
  2796.8 B      114.5
M1
  2682.3
(23/2-)
  2805.1 B (27/2-)        8.3S
    99.3

M1
  2796.8
  2705.9

(25/2-)
  2875.4 B (29/2+) 52 ns 12      70.3
E1
  2805.1
(27/2-)
  3292.4 B (29/2-)      586.5

  2705.9
(25/2-)
  3561.4 B (31/2-)      756.3

  2805.1
(27/2-)
  3660.9 B (31/2-)      368.5

  3292.4
(29/2-)
  3938.4 B (33/2-)      277.4
   377.0
   646.0



  3660.9
  3561.4
  3292.4
(31/2-)
(31/2-)
(29/2-)
  4185.8 B (33/2+)     1310.4

  2875.4
(29/2+)
  4216.9 B (35/2-)      278.5
   655.6


  3938.4
  3561.4
(33/2-)
(31/2-)
  4224.9 B (37/2-)        8.0S
   286.5


  4216.9
  3938.4
(35/2-)
(33/2-)
  4757.5 B (39/2)      532.7

  4224.9
(37/2-)
  4798.0 B (37/2+)      612.2

  4185.8
(33/2+)
  5020.2 B (41/2+)      222.2
   262.7


  4798.0
  4757.5
(37/2+)
(39/2)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		M(γ)Final Levels
  5416.0 B (43/2)      395.8

  5020.2
(41/2+)
  5815.1 B (47/2)      399.1

  5416.0
(43/2)
  6106.9 B (49/2)      291.8

  5815.1
(47/2)
  6499.4 B (51/2)      392.5

  6106.9
(49/2)

E(level): From least-squares fit to γ energies with equal uncertainties for each measured Eγ. No uncertainties are given here for the level energies, but they are given in (HI,xnγ) on the assumption that the uncertainties in the Eγ are 0.3 keV.

Jπ(level): From (HI,xnγ) data and based on γ(θ) measurements and expected bandstructure, with the difference that because the Jπ value of the ground state adopted here is tentative, all the other Jπ values are also tentative. See the (HI,xnγ) dataset for authors’ Jπ values (1995Sa31).

M(γ): From (HI,xnγ) (1995Sa31).

Back to top

Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 1 - 7/2- state with configuration νf7/23.
     0.0 (7/2-) 115 ms 1 
% ε = 14 9
% α = 94 4
    
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 2 - band based on 9/2- state with configuration
   111.0 (9/2-)       
   954.1 (13/2-)      843.1

   111.0
(9/2-)
  1589.9 (17/2-)      635.8

   954.1
(13/2-)
  1859.7 (21/2-)      269.8
E2
  1589.9
(17/2-)
  2705.9 (25/2-)      411.4
   846.2


  2294.4
  1859.7
(23/2-)
(21/2-)
  3292.4 (29/2-)      586.5

  2705.9
(25/2-)
  3938.4 (33/2-)      277.4
   377.0
   646.0



  3660.9
  3561.4
  3292.4
(31/2-)
(31/2-)
(29/2-)
  4224.9 (37/2-)        8.0S
   286.5


  4216.9
  3938.4
(35/2-)
(33/2-)
  4757.5 (39/2)      532.7

  4224.9
(37/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 3 - 23/2- state with configuration νf7/2νh9/22.
  2294.4 (23/2-)       
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 4 - band based on 23/2- level
  2682.3 (23/2-)       
  2805.1 (27/2-)        8.3S
    99.3

M1
  2796.8
  2705.9

(25/2-)
  3561.4 (31/2-)      756.3

  2805.1
(27/2-)
  4216.9 (35/2-)      278.5
   655.6


  3938.4
  3561.4
(33/2-)
(31/2-)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 5 - band based on 29/2+ state with configuration
  2875.4 (29/2+) 52 ns 12      
  4185.8 (33/2+)     1310.4

  2875.4
(29/2+)
  4798.0 (37/2+)      612.2

  4185.8
(33/2+)
  5020.2 (41/2+)      222.2
   262.7


  4798.0
  4757.5
(37/2+)
(39/2)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)M(γ)Final Levels
Band 6 - band based on 43/2 level.
  5416.0 (43/2)       
  5815.1 (47/2)      399.1

  5416.0
(43/2)
  6106.9 (49/2)      291.8

  5815.1
(47/2)
  6499.4 (51/2)      392.5

  6106.9
(49/2)

Back to top

Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   111.0 (9/2-)      111.0M12.97α=2.97, α(K)=2.47 4, α(L)=0.386 6, α(M)=0.0871 13, α(N)=0.0207 3, α(O)=0.00317 5, α(P)=0.000210 3
  1859.7 (21/2-)      269.8E20.1095α=0.1095, α(K)=0.0732 11, α(L)=0.0278 4, α(M)=0.00673 10, α(N)=0.001570 22, α(O)=0.000211 3, α(P)=5.12×10-6 8
  2796.8      114.5M12.72α=2.72, α(K)=2.26 4, α(L)=0.353 5, α(M)=0.0797 12, α(N)=0.0189 3, α(O)=0.00290 4, α(P)=0.000192 3
  2805.1 (27/2-)       99.3M14.09α=4.09, α(K)=3.40 5, α(L)=0.531 8, α(M)=0.1201 17, α(N)=0.0285 4, α(O)=0.00437 7, α(P)=0.000290 4
  2875.4 (29/2+) 52 ns 12      70.3E10.885α=0.885, α(K)=0.715 10, α(L)=0.1322 19, α(M)=0.0300 5, α(N)=0.00694 10, α(O)=0.000959 14, α(P)=4.17×10-5 6

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0(7/2-) 115 ms 1 
% ε = 14 9
% α = 94 4
E(level): 7/2- state with configuration νf7/23.
   111.0(9/2-)   E(level): band based on 9/2- state with configuration.
   954.1(13/2-)   E(level): band based on 9/2- state with configuration.
  1589.9(17/2-)   E(level): band based on 9/2- state with configuration.
  1859.7(21/2-)   E(level): band based on 9/2- state with configuration.
  2294.4(23/2-)   E(level): 23/2- state with configuration νf7/2νh9/22.
  2682.3(23/2-)   E(level): band based on 23/2- level.
  2705.9(25/2-)   E(level): band based on 9/2- state with configuration.
  2805.1(27/2-)   E(level): band based on 23/2- level.
  2875.4(29/2+) 52 ns 12  E(level): band based on 29/2+ state with configuration.
  3292.4(29/2-)   E(level): band based on 9/2- state with configuration.
  3561.4(31/2-)   E(level): band based on 23/2- level.
  3938.4(33/2-)   E(level): band based on 9/2- state with configuration.
  4185.8(33/2+)   E(level): band based on 29/2+ state with configuration.
  4216.9(35/2-)   E(level): band based on 23/2- level.
  4224.9(37/2-)   E(level): band based on 9/2- state with configuration.
  4757.5(39/2)   E(level): band based on 9/2- state with configuration.
  4798.0(37/2+)   E(level): band based on 29/2+ state with configuration.
  5020.2(41/2+)   E(level): band based on 29/2+ state with configuration.
  5416.0(43/2)   E(level): band based on 43/2 level.
  5815.1(47/2)   E(level): band based on 43/2 level.
  6106.9(49/2)   E(level): band based on 43/2 level.
  6499.4(51/2)   E(level): band based on 43/2 level.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
  2805.1     8.3E(γ): γ not observed, but presence deduced from γγ coincidences.
  4224.9     8.0E(γ): γ not observed, but presence deduced from γγ coincidences.

Back to top