ADOPTED LEVELS, GAMMAS for 168Re

Author: Coral M. Baglin |  Citation: Nucl. Data Sheets 111, 1807 (2010) |  Cutoff date: 15-Jun-2010 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-5.81×103 keV 4S(n)= 9.02×103 keV SYS(p)= 9.8×102 keV 4Q(α)= 5063 keV 13
Reference: 2012WA38

References:
  A  172Ir α decay (4.4 S)  B  172Ir α decay (2.19 S)

General Comments:

Identification: comparison of 141Pr(32S,xn) excitation functions, producing known tungsten isotopes, with 141Pr(32S,pxn) excitation functions, producing new and established rhenium isotopes; presence of Ta x rays in α-γ coincidence spectra (1992Me10). Earlier assignments of various α groups to one or more isomers of 168Re (1978Ca11,1978Sc26,1982De11,1984Sc06) are apparently incorrect.

Levels: ε decay from 168Os to 168Re is expected (57% branch) but has not yet been observed.

Q-value: Note: Current evaluation has used the following Q record

Q-value: ΔS(n)=60 (2003Au03,2009AuZZ).










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
    0.0AB (7+) 4.4 s 1 
% ε ≈ 100
% α ≈ 5×10-3
     
   89.7 4 A       89.7 4 
  100

    0.0
(7+)
  162.1 2  B (8+)     162.1 2 
  100
M1+E2
    0.0
(7+)
  226.0 6 A      136.3 4 
 

   89.7

  349.2 6 A  (3)     123.2 2 
  100
(E1)
  226.0

E(level): From Eγ.

Jπ(level): Note that these values arise primarily from the coupling of expected low-lying p and n orbitals to give likely configurations for the isomeric state(s) in both 168Re and the 172Ir α-decay parent; consequently, they are highly tentative.

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Additional Gamma Data:















E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityMixing
Ratio
Conversion
Coefficient
Additional Data
  162.1 (8+)     162.1 2 M1+E20.99 160.99α=0.99 6
  349.2 (3)     123.2 2 (E1) 0.224α=0.224

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
    0.0(7+) 4.4 s 1 
% ε ≈ 100
% α ≈ 5×10-3
%α: deduced from Iα/Iγ(199.3γ in 168W) and ε decay scheme for 168Re (1992Me10).
E(level): %α: deduced from Iα/Iγ(199.3γ in 168W) and ε decay scheme for 168Re (1992Me10).
   89.7   E(level): E may differ from value shown because order of 90γ-123γ-136γ cascade has not been established.
  226.0   E(level): E may differ from value shown because order of 90γ-123γ-136γ cascade has not been established.

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Additional Gamma Comments:

E(level)E(gamma)Comments

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