ADOPTED LEVELS, GAMMAS for 91Kr

Author: Coral M. Baglin |  Citation: Nucl. Data Sheets 114, 1293 (2013) |  Cutoff date: 1-Sep-2013 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=6771 keV 8S(n)= 4086 keV 3S(p)= 14263 keV 4Q(α)= -6973 keV 3
Reference: 2012WA38

References:
  A  91Br β- decay  B  92Br β-n decay
  C  252Cf SF decay 

General Comments:

Production: 91Br β- decay, 92Br β-n decay and 252Cf SF decay. Others (partial list): 248Cm(γ,F): (2005Ga25); 237Np(γ,F) (2005Ga50); 243Am(γ,F) (2005Ga50); 232Th(γ,F) (2003Ga21); 244Pu(γ,F) (2013Ga21); 238U(γ,F) (2003Ga21,2002Ib01); U(n,x), fast neutrons (2000Ka02,2000Lh02).

Q-value: Q(βn)=319 7 (2012Wa38).










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0ABC 5/2(+) 8.57 s 4 
% β- = 100
     
   144.3 6 AB  (3/2+) 56 ns    144.1
  100
E2
     0
5/2(+)
   300.7 5 AB       301.4
  100

     0
5/2(+)
   482.8 6 AB       338.4
   482.8
   30
  100


   144.3
     0
(3/2+)
5/2(+)
   707.0 7 AB       406.4
   707.0
    9
  100


   300.7
     0

5/2(+)
   781.4 7 AB       780.5
  100

     0
5/2(+)
   843.9 6 AB       361.7
   542.7
   699.5
   844
  100
   91
   27
 




   482.8
   300.7
   144.3
     0


(3/2+)
5/2(+)
   966.7 9  B       666.4
   822.0
   50
  100


   300.7
   144.3

(3/2+)
  1120.2 6 AB       637
   818.7
   976.4
  1121
 
  100
   50
 




   482.8
   300.7
   144.3
     0


(3/2+)
5/2(+)
  1155.5  C     1155.5
  100

     0
5/2(+)
  1210.1 10 A          
  1356.8 12  B       874.0
  100

   482.8

  1419.5 12  B      1118.8
  100

   300.7

  1422.0 8 A        715
  1422
 
 


   707.0
     0

5/2(+)
  1916.2  C      760.7
  100

  1155.5

  1917.0 10 A       1917
  100

     0
5/2(+)
  2144.7 8 A       1363
  2145
 
 


   781.4
     0

5/2(+)
  3675.1 6 A       2465
  2893
  3191
  3377
  3674
 
 
 
 
 





  1210.1
   781.4
   482.8
   300.7
     0




5/2(+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  3734.7 8 A       3590
  3735
 
 


   144.3
     0
(3/2+)
5/2(+)
  3773.8 9 A       3292
  3472
 
 


   482.8
   300.7


  3919.3 10 A       2709
  3775
 
 


  1210.1
   144.3

(3/2+)
  4153.8 12 A       3853
  100

   300.7

  4452.9 12 A       3970
  100

   482.8

E(level): From least-squares fit to Eγ assigning an uncertainty of 1 keV to all data (authors did not state uncertainties).

T1/2(level): From 91Br β- decay, except as noted.

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
   144.3 (3/2+) 56 ns    144.1E20.240B(E2)(W.u.)=5.4, α=0.240

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     05/2(+) 8.57 s 4 
% β- = 100
Q=+0.30 3 (1995Ke04), μ=-0.583 2 (1995Ke04)
Δ<r2>(91Kr-86Kr)=0.597, uncertainty 0.006 (statistical only), 0.020 (systematic included), 0.114 (including uncertainties arising from evaluation of isotope shifts) (1995Ke04).
E(level): Δ<r2>(91Kr-86Kr)=0.597, uncertainty 0.006 (statistical only), 0.020 (systematic included), 0.114 (including uncertainties arising from evaluation of isotope shifts) (1995Ke04).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   300.7   301.4E(γ): From 92Br β-n decay.
   482.8   338.4E(γ): From 92Br β-n decay.
   482.8E(γ): From 92Br β-n decay.
   707.0   406.4E(γ): From 92Br β-n decay.
   707.0E(γ): From 92Br β-n decay.
   781.4   780.5E(γ): From 92Br β-n decay.
   843.9   361.7E(γ): From 92Br β-n decay.
   542.7E(γ): From 92Br β-n decay.
   699.5E(γ): From 92Br β-n decay.
   966.7   666.4E(γ): From 92Br β-n decay.
   822.0E(γ): From 92Br β-n decay.
  1120.2   818.7E(γ): From 92Br β-n decay.
   976.4E(γ): From 92Br β-n decay.
  1155.5  1155.5E(γ): From 252Cf SF decay.
I(γ): From 252Cf SF decay.
  1356.8   874.0E(γ): From 92Br β-n decay.
  1419.5  1118.8E(γ): From 92Br β-n decay.
  1916.2   760.7E(γ): From 252Cf SF decay.
I(γ): From 252Cf SF decay.

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