ADOPTED LEVELS for 92Br

Author: Coral M. Baglin |  Citation: Nucl. Data Sheets 113, 2187 (2012) |  Cutoff date: 15-Sep-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=12537 keV 8S(n)= 3197 keV 8S(p)= 1.32×104 keV SYQ(α)= -7.94×103 keV SY
Reference: 2012WA38

References:
  A  92Br IT decay 

General Comments:

Identification in 235U(n,f) or U(p,x) after chemical or mass separation, and based on delayed-neutron counting or growth in decay curves of known γ rays following β- decay of 92Kr daughter. 92Br also produced in 9Be(238U,X), E=80 MeV/nucleon (2009Fo05) and in 9Be(136Xe,X), E=120 MeV/nucleon (2012Qu01).

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

Q-value: ΔS(p)=503, ΔQ(α)=400 (2011AuZZ).

Q-value: Q(β-n)=6670 7 (2011AuZZ).





E(level)
(keV)
XREF T1/2(level)
  0.0A 0.314 s 16 
% β- = 100
% β-n = 33.1 25
  0.0+XA < 500 ns

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  0.0 0.314 s 16 
% β- = 100
% β-n = 33.1 25
-n is weighted average of 32.0 45 (1988Kr10), 34.6 25 (1984Ew01) and 21 8 (1978Cr03), consistent with value recommended in 1993Ru01. Others: 1974Kr21, 1978Kr15.
E(level): %β-n is weighted average of 32.0 45 (1988Kr10), 34.6 25 (1984Ew01) and 21 8 (1978Cr03), consistent with value recommended in 1993Ru01. Others: 1974Kr21, 1978Kr15.
Jπ(level): Possibly (2-). Suggested configuration=((π f5/2)(ν s1/2)) (1989PfZZ); Jπ=2- for 84Br, (2-) for 86Br. However, among the β- decay branches to excited states of 92Kr, the one populating the first excited state (which probably has Jπ=2+) has the lowest log ft (5.9) so Jπ(92Br)=2- is highly tentative.

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