ADOPTED LEVELS, GAMMAS for 86Br

Authors: Alexandru Negret, Balraj Singh |  Citation: Nucl. Data Sheets 124, 1 (2015) |  Cutoff date: 30-Nov-2014 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=7633 keV 3S(n)= 5128 keV 4S(p)= 10508 keV 4Q(α)= -7954 keV 5
Reference: 2012WA38

References:
  A  86Se β- decay (14.3 S)  B  87Se β-n decay (5.50 S)
  C  208Pb(18O,Fγ) 

General Comments:

86Br nuclide first produced in decay of 86Se by 1960Sa05 who assigned a 16S activity incorrectly to 87Se decay, instead of correct assignment of 86Se to 86Br. Confirmed identification is from the work of 1962St13, and several later studies. It is possible that a 50-70 s activity found by 1959Ye08 belonged to 86Br

α 4.5 s 10 (possible isomeric) activity was assigned to 86Br by 1970Lu06 from the decay pattern of 1564γ in 86Kr, but the existence of this activity remains unconfirmed.

In 2009Po10 from comparison with 88Rb structure authors suggest that level 1624 keV is 10 ns isomer, but this was not confirmed in experiment.

Precise mass measurement using Penning-trap spectrometer: 2007Ra23

Q-value: S(2n)=13992 26, S(2p)=24357 4 (2012Wa38)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0A C (1-) 55.1 s 4 
% β- = 100
     
     5.1 3 A C (2-)        5.1S
  100

     0
(1-)
    53.3 3 A C (3-)       48.3 3 
  100
M1
     5.1
(2-)
   130.5 4   C (4-)       77.0 5 
  100
M1(+E2)
    53.3
(3-)
   207.39 24 A   (1-,2-)      154.2 4 
   207.5 3 
   39 2 
  100 5 


    53.3
     0
(3-)
(1-)
   243.6 4   C (4-)      190.3 2 
  100
(M1)
    53.3
(3-)
   298.2 4 A   (0-:4-)      293.2 4 
  100

     5.1
(2-)
   435.65 25 A   (1-,2)      228.4 4 
   382.4 3 
   430.5 4 
   435.5 4 
   22 1 
  100 5 
   13 1 
   10 1 




   207.39
    53.3
     5.1
     0
(1-,2-)
(3-)
(2-)
(1-)
   574.7 4   C (5-)      331.1 2 
   444.3 3 
  100 8 
   25 4 


   243.6
   130.5
(4-)
(4-)
  1047.2 3 A   (1-,2)      611.6 5 
   749.0 4 
   839.6 5 
   993.8 4 
  1042.0 4 
  1047.1 5 
    9
   32 1 
    9
  100 5 
   23 1 
   10






   435.65
   298.2
   207.39
    53.3
     5.1
     0
(1-,2)
(0-:4-)
(1-,2-)
(3-)
(2-)
(1-)
  1170.4 4 A   (1-,2-)     1117.0 4 
  100

    53.3
(3-)
  1494.2 5   C      919.5 4 
  1250.8 5 
   33 17 
  100 33 


   574.7
   243.6
(5-)
(4-)
  1624.3 4   C (7+)      130.4 5 
  1049.6 2 
  1493.5 5 
   10 4 
  100 10 
   16 8 


[E3]
  1494.2
   574.7
   130.5

(5-)
(4-)
  1779.7 7   C     1205.0 5 
  100

   574.7
(5-)
  1920.2 7   C     1345.5 5 
  100

   574.7
(5-)
  2446.3 3 A   1+     1275.8 4 
  1399.0 3 
  2010.6 3 
  2239.0 3 
  2441.1 3 
    5.1 3 
   13.3 7 
   23.7 12 
   17.9 9 
  100 5 





  1170.4
  1047.2
   435.65
   207.39
     5.1
(1-,2-)
(1-,2)
(1-,2)
(1-,2-)
(2-)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2665.1 4 A   1+     2660.0 3 ?
  100

     5.1
(2-)
  2687.4 5   C     1063.1 3 
  100

  1624.3
(7+)
  3073.9 8   C     1153.7 5 
  100

  1920.2

  3240.5 6   C     1616.1 5 
  100

  1624.3
(7+)
  3763.3 7   C      522.8 3 
  100

  3240.5

  3814.0 6   C      573.5 4 
  1126.7 5 
   40 20 
  100 40 


  3240.5
  2687.4


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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - πf5/2-1~#νd5/2+1 sequence
     5.1 3  (2-)        
    53.3 3  (3-)       48.3 3 
  100
M1
     5.1
(2-)
   243.6 4  (4-)      190.3 2 
  100
(M1)
    53.3
(3-)
   574.7 4  (5-)      331.1 2 
   444.3 3 
  100 8 
   25 4 


   243.6
   130.5
(4-)
(4-)

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Additional Gamma Data:















E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityMixing
Ratio		Conversion
Coefficient		Additional Data
    53.3 (3-)       48.3 3 M1 0.889α=0.889 21, α(K)=0.785 18, α(L)=0.0884 21, α(M)=0.0141 4, α(N)=0.00130 3, α(N+)=0.00130 3
   130.5 (4-)       77.0 5 M1(+E2)0.3 LT0.32α=0.32 9, α(K)=0.28 8, α(L)=0.035 13, α(M)=0.0056 20, α(N)=0.00050 16, α(N+)=0.00050 16
   243.6 (4-)      190.3 2 (M1) 0.0206α=0.0206, α(K)=0.0183 3, α(L)=0.00199 3, α(M)=0.000316 5, α(N)=2.95×10-5 5, α(N+)=2.95E-5 5

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     5.1(2-)   E(level): πf5/2-1~#νd5/2+1 sequence.
    53.3(3-)   E(level): πf5/2-1~#νd5/2+1 sequence.
   243.6(4-)   E(level): πf5/2-1~#νd5/2+1 sequence.
   574.7(5-)   E(level): πf5/2-1~#νd5/2+1 sequence.

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Additional Gamma Comments:

E(level)E(gamma)Comments
     5.1     5.1E(γ): from level-energy difference.
    53.3    48.3M(γ): from α(exp) (2009Po10)
   130.5    77.0M(γ): from α(exp) (2009Po10); δ deduced by the evaluators
   243.6   190.3M(γ): from Adopted ΔJπ and systematics of transitions in neighboring nuclides.

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