ADOPTED LEVELS, GAMMAS for 78Br

Authors: Ameenah R. Farhan, Balraj Singh |  Citation: Nucl. Data Sheets 110, 1917 (2009) |  Cutoff date: 30-Jun-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=727 keV 4S(n)= 8289 keV 5S(p)= 6142 keV 4Q(α)= -5017 keV 4
Reference: 2012WA38

References:
  A  78Br IT decay (119.4 μs)  B  70Zn(11B,3nγ)
  C  75As(α,nγ)  D  76Se(α,NPG),78Se(p,nγ),
  E  77Se(3He,d)  F  77Se(α,2npγ),76Ge(7Li,5nγ)
  G  78Se(p,n)  H  78Se(p,nγ)
  I  79Br(p,d) 








E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABCDEFGHI 1+ 6.45 m 4 
% ε ≥ 99.99
% β- ≤ 0.01
     
    32.32 8 ABCD FGHI (2-) 11.3 ns 30      32.3 1 
   100
[E1]
     0.0
1+
    55.11 10   C   GHI (1,2)+ 7.5 ns 11      55.1 1 
   100
[M1]
     0.0
1+
   125.14 11   C E GHI (1,2)+      125.0 2 
   100

     0.0
1+
   180.89 13 ABCD F H  (4+) 119.4 µs 10 
% IT = 100
   148.55 10 
   100
[M2]
    32.32
(2-)
   193.40 16   C E GH  (0:3)(+)      193.59 20 
   100

     0.0
1+
   197.24 14   C E  HI (1,2,3)(+) 4.7 ns 5      71.99 20 
   141.8 5 
   164.6 5 
   197.0?
   100 6 
     9 6 
    36 6 
 




   125.14
    55.11
    32.32
     0.0
(1,2)+
(1,2)+
(2-)
1+
   204.40 10   C    HI (0:3)(+) 5.9 ns 6      79.2 2 
   204.41 10 
     6 1 
   100 8 


   125.14
     0.0
(1,2)+
1+
   227.67 18  B D F    (5+) 84 ns 8      46.8 2 
   100
(M1+E2)
   180.89
(4+)
   242.82 17   C  FG I (2,3)- 17 ns 2      46.3 5 
   242.85 2 
  ≈200
   100 10 
[E1]

   197.24
     0.0
(1,2,3)(+)
1+
   244.62 15   C E GH  (2,3)+      212.45 20 
   244.7 5 
   100 9 
    89 27 


    32.32
     0.0
(2-)
1+
   263.36 15   C   GHI (3,4)-      231.07 20 
   263.34 20 
   100 9 
    74 9 


    32.32
     0.0
(2-)
1+
   265.03 18   CD FG   (5-) 5.1 ns 5      37.41 10 
    84.05 20 
   100 8 
    48 4 

D
   227.67
   180.89
(5+)
(4+)
   284.3 5 ?       H       284.3 5 ?
   100

     0.0
1+
   292.2 5 ?       H       292.2 5 ?
   100

     0.0
1+
   311.94 12   C   GH       114.3 5 
   118.74 20 
   186.5 5 
   279.62 10 
   311.6 5 
 
 
    51
 
   100 16 





   197.24
   193.40
   125.14
    32.32
     0.0
(1,2,3)(+)
(0:3)(+)
(1,2)+
(2-)
1+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   329.52 13   C E GHI (1,2)+      204.41 10 
   329.41 20 
   100
    13 4 


   125.14
     0.0
(1,2)+
1+
   337.85 20  BCD F    (6+) 7.3 ns 12      72.88 20 
   110.16 10 
     3.2 2 
   100 7 
D
D
   265.03
   227.67
(5-)
(5+)
   367.4 3       GHI (1:4)-       75.0 5 ?
   102.8 5 
   161.91 10 ?
   334.9 5 
   367.2 5 
 
    38
 
   100
    40





   292.2
   265.03
   204.40
    32.32
     0.0

(5-)
(0:3)(+)
(2-)
1+
   389 4       G I (3,4)-        
   390.9 3   C E GH  (2,3)+       61.0 5 ?
    98.0 5 ?
   186.5 5 
   358.2 5 
   391.3 5 
 
 
    71
    33
   100 48 





   329.52
   292.2
   204.40
    32.32
     0.0
(1,2)+

(0:3)(+)
(2-)
1+
   414.8 5       GH       414.8 5 
   100

     0.0
1+
   423.4 4  BCD F    (6-) < 25 ns    158.5?
   195.8
 
   100

(D)
   265.03
   227.67
(5-)
(5+)
   433.5 4   C E GHI (1,2)+      103.46 20 ?
   239.2 5 ?
   308.1 5 
   433.7 5 
 
 
   100 29 
    99 59 




   329.52
   193.40
   125.14
     0.0
(1,2)+
(0:3)(+)
(1,2)+
1+
   437.74 22  BCD F    (7+) < 3 ns     99.89 10 
   100
D
   337.85
(6+)
   447.05 23   C   GH  (0+:3+)       80.0 5 ?
   202.41 20 
   414.3 5 ?
   447.2 5 
 
   100 15 
    32 31 
 




   367.4
   244.62
    32.32
     0.0
(1:4)-
(2,3)+
(2-)
1+
   457.22 18   C  F    (0:3+)      261.30 20 
   457.2 2 
   100 12 
    44 12 


   197.24
     0.0
(1,2,3)(+)
1+
   467.81 24  BCD F    (8+)       30.07 10 
   100
(D)
   437.74
(7+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   473.9 3 ?  CD           208.84 20 ?
   100

   265.03
(5-)
   476.93 15   C   GHI (3-,4-)      195.0 5 ?
   232.36 10 
   274.4 5 ?
   279.62 10 
   477.4 5 
 
   100 7 
 
    49 5 
     6 4 





   284.3
   244.62
   204.40
   197.24
     0.0

(2,3)+
(0:3)(+)
(1,2,3)(+)
1+
   498.5 5   C E GHI (1,2)+      215.0 5 ?
   302.6 5 
   497.9 14 
 
 
   100 19 



   284.3
   197.24
     0.0

(1,2,3)(+)
1+
   508 10 ?      G          
   526.7 6       GH       159.3 5 
   100

   367.4
(1:4)-
   551 4       G I (0:3)+        
   579.43 25   C E G I (2,3)+      102.5 2 
   100

   476.93
(3-,4-)
   601.2 3 ?  CD           336.15 20 ?
   100

   265.03
(5-)
   643 4         I (0:3)+        
   647.59 22   C  F    (4)      404.9 2 
   419.6 3 
   100 15 
    60 10 


   242.82
   227.67
(2,3)-
(5+)
   663 4         I (0:3)+&(2:6)-        
   684.9 4  BCD      (7-)      210.73 20 ?
   261.5
   347.0
   419.6 3 ?
   457.3
 
    73 14 
    50 9 
 
   100 18 





   473.9
   423.4
   337.85
   265.03
   227.67

(6-)
(6+)
(5-)
(5+)
   717 4         I (1,2,3)+        
   793.3 3   C E   I (1,2)+      213.88 10 
   100

   579.43
(2,3)+
   828.3 7  BCD      (8-)      404.9
   100

   423.4
(6-)
   854 4         I (1,2,3)+        
   868 4         I (1,2,3)+        
   891 4         I (1,2,3)+        
   912.0 4   C E   I (1,2)+      118.74 20 
   100

   793.3
(1,2)+
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   930 4         I (1,2,3)+        
   977.1 3  B D F    (9+)      509.2 2 
   100

   467.81
(8+)
   989 4         I (0:3)+        
  1001.0 4   C     I (1,2,3)+      207.69 20 
   100

   793.3
(1,2)+
  1026 4         I (0:3)+        
  1030.2 4  BCD      (8-)      345.3
   592.3
   606.8
    18 3 
    13 3 
   100 8 



   684.9
   437.74
   423.4
(7-)
(7+)
(6-)
  1039 4         I (0:3)+        
  1060 4     E   I (1+,2+)        
  1130 4         I (1,2,3)(+)        
  1173 4     E   I (2,3)+        
  1188 4         I (1,2,3)(+)        
  1200 4         I (0:3)(+)        
  1243 4         I (0:3)+        
  1261 4     E   I (2,3)+        
  1371.8 3  BCD F    (10+)      394.5 3 
   904.1 2 
    19 3 
   100 15 

(Q)
   977.1
   467.81
(9+)
(8+)
  1395    E     (2,3)+        
  1463.1 5  BCD      (9-)      432.9
   778.2
    45 7 
   100 17 


  1030.2
   684.9
(8-)
(7-)
  1486    E     (0,1)+        
  1570    E     (LE 3)+        
  1691    E     (2,3)+        
  1746    E     (0:3)+        
  1823    E     (2+,3+)        
  1905.0 7  B        (10-)      874.8
   100

  1030.2
(8-)
  1940.5 4  BCD F    (11+)      568.5 3 
   963.6
   100 14 
    11.6 23 
D

  1371.8
   977.1
(10+)
(9+)
  1985    E            
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
  2062    E     (2+,3+)        
  2162    E     (2+,3+)        
  2455.5 7  B        (11-)      992.4
   100

  1463.1
(9-)
  2585.3 5  B D      (12+)     1213.5
   100
(Q)
  1371.8
(10+)
  3016.5 8  B        (12-)     1111.5
   100

  1905.0
(10-)
  3148.8 6  B        (13+)      563.6
  1208.3
   100 16 
    95 16 
(D)
(Q)
  2585.3
  1940.5
(12+)
(11+)
  3619.9 9  B        (13-)     1164.4
   100

  2455.5
(11-)
  4049.3 10  B        (14+)     1464
   100

  2585.3
(12+)
  4296.5 10  B        (14-)     1280
   100

  3016.5
(12-)
  4541.8 10  B        (15+)     1393
   100

  3148.8
(13+)
  4921.9 10  B        (15-)     1302
   100

  3619.9
(13-)
  5604.3 10  B        (16+)     1555
   100

  4049.3
(14+)
  6086.9 10  B        (17+)     1545
   100

  4541.8
(15+)

E(level): From least-squares fit to Eγ’s, assuming Δ(Eγ)=0.5 keV when not given. For levels populated in transfer reactions only, the values are from weighted averages of available data. Estimated uncertainty in level energies from (3He,d) only is ≈10 keV

Jπ(level): Assignments for low-spin (J|<4) are mainly from 79Br(p,d) and 77Se(3He,d) particle transfer reactions. The target nuclei 79Br and 77Se have g.s. spins 3/2- and 1/2-, respectively. The unpaired proton in 79Br is expected to be in 2p3/2 orbital and unpaired neutron in 77Se in the 2p1/2 orbital. In (p,d), the low-lying levels in 78Br are expected to be from neutron holes in 2p1/2, 1f5/2, 2p3/2, 1g9/2 and 2d5/2 orbitals. In (3He,d), the low-lying states in 78Br are expected to be from protons in 2p3/2, 1f5/2 and 2p1/2 orbitals. The levels populated in both reactions. The assignments for high-spin (J>4) levels are mainly from band structures in 70Zn(11B,3nγ) reaction and γγ(θ) data for only selected transitions; ascending spins are assumed with the increase in excitation energy.

T1/2(level): From γ(t) in (α,nγ) (1979Kl05) unless otherwise stated. Uncertainty of 10% is added in quadrature to the quoted uncertainties by 1979Kl05, see comment in (α,nγ) dataset.

M(γ): From γ(θ) data in a,2npg),(7Li,5nγ) and γγ(θ)(DCO) in (11B,3nγ), unless otherwise stated.

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Band based on (8+), α=0
   467.81 24  (8+)        
  1371.8 3  (10+)      394.5 3 
   904.1 2 
    19 3 
   100 15 

(Q)
   977.1
   467.81
(9+)
(8+)
  2585.3 5  (12+)     1213.5
   100
(Q)
  1371.8
(10+)
  4049.3 10  (14+)     1464
   100

  2585.3
(12+)
  5604.3 10  (16+)     1555
   100

  4049.3
(14+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - Band based on (9+), α=1
   977.1 3  (9+)        
  1940.5 4  (11+)      568.5 3 
   963.6
   100 14 
    11.6 23 
D

  1371.8
   977.1
(10+)
(9+)
  3148.8 6  (13+)      563.6
  1208.3
   100 16 
    95 16 
(D)
(Q)
  2585.3
  1940.5
(12+)
(11+)
  4541.8 10  (15+)     1393
   100

  3148.8
(13+)
  6086.9 10  (17+)     1545
   100

  4541.8
(15+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - Band based on (6-), α=0
   423.4 4  (6-) < 25 ns      
  1030.2 4  (8-)      345.3
   592.3
   606.8
    18 3 
    13 3 
   100 8 



   684.9
   437.74
   423.4
(7-)
(7+)
(6-)
  1905.0 7  (10-)      874.8
   100

  1030.2
(8-)
  3016.5 8  (12-)     1111.5
   100

  1905.0
(10-)
  4296.5 10  (14-)     1280
   100

  3016.5
(12-)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 4 - Band based on (7-), α=1
   684.9 4  (7-)        
  1463.1 5  (9-)      432.9
   778.2
    45 7 
   100 17 


  1030.2
   684.9
(8-)
(7-)
  2455.5 7  (11-)      992.4
   100

  1463.1
(9-)
  3619.9 9  (13-)     1164.4
   100

  2455.5
(11-)
  4921.9 10  (15-)     1302
   100

  3619.9
(13-)

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
    32.32 (2-) 11.3 ns 30      32.3 1 [E1]2.29B(E1)(W.u.)=0.00030 8, α=2.29, α(K)=2.02 4, α(L)=0.232 4, α(M)=0.0362 6, α(N)=0.00312 6, α(N+)=0.00312 6
    55.11 (1,2)+ 7.5 ns 11      55.1 1 [M1]0.609B(M1)(W.u.)=0.0109 16, α=0.609, α(K)=0.538 8, α(L)=0.0605 9, α(M)=0.00963 15, α(N)=0.000890 14, α(N+)=0.000890 14
   180.89 (4+) 119.4 µs 10 
% IT = 100
   148.55 10 [M2]0.295B(M2)(W.u.)=0.1519 18, α=0.295, α(K)=0.257 4, α(L)=0.0325 5, α(M)=0.00523 8, α(N)=0.000477 7, α(N+)=0.000477 7
   227.67 (5+) 84 ns 8      46.8 2 (M1+E2)8α=8 7, α(K)=6 5, α(L)=1.4 13, α(M)=0.22 21, α(N)=0.017 16, α(N+)=0.017 16

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
   244.62(2,3)+   XREF: E(249).
   265.03(5-) 5.1 ns 5  XREF: C(?).
   329.52(1,2)+   XREF: E(322)γ(322).
   337.85(6+) 7.3 ns 12  XREF: C(?).
   367.4(1:4)-   XREF: γ(361).
   390.9(2,3)+   XREF: E(383).
   423.4(6-) < 25 ns XREF: C(?)F(?).
E(level): Band based on (6-), α=0.
   433.5(1,2)+   XREF: γ(427)I(430).
   437.74(7+) < 3 ns XREF: C(?).
   457.22(0:3+)   XREF: C(?).
   467.81(8+)   XREF: C(?).
E(level): From (p,nγ) only. Band based on (8+), α=0.
   473.9   XREF: C(?).
   476.93(3-,4-)   XREF: γ(465)H(479).
   498.5(1,2)+   XREF: C(?)E(506)γ(491)I(495).
   551(0:3)+   XREF: γ(545).
   579.43(2,3)+   XREF: E(573)I(579).
   601.2   XREF: C(?).
   647.59(4)   XREF: C(?).
   684.9(7-)   XREF: C(?).
E(level): Band based on (7-), α=1.
   828.3(8-)   XREF: C(?).
   977.1(9+)   E(level): Band based on (9+), α=1.
  1001.0(1,2,3)+   XREF: I(1005).
  1030.2(8-)   XREF: C(?).
E(level): Band based on (6-), α=0.
  1261(2,3)+   XREF: E(1254).
  1371.8(10+)   XREF: C(?).
E(level): From (p,nγ) only. Band based on (8+), α=0.
E(level)Jπ(level)T1/2(level)Comments
  1463.1(9-)   XREF: C(?).
E(level): Band based on (7-), α=1.
  1905.0(10-)   E(level): Band based on (6-), α=0.
  1940.5(11+)   XREF: C(?).
E(level): Band based on (9+), α=1.
  2455.5(11-)   E(level): Band based on (7-), α=1.
  2585.3(12+)   E(level): From (p,nγ) only. Band based on (8+), α=0.
  3016.5(12-)   E(level): Band based on (6-), α=0.
  3148.8(13+)   E(level): Band based on (9+), α=1.
  3619.9(13-)   E(level): Band based on (7-), α=1.
  4049.3(14+)   E(level): From (p,nγ) only. Band based on (8+), α=0.
  4296.5(14-)   E(level): Band based on (6-), α=0.
  4541.8(15+)   E(level): Band based on (9+), α=1.
  4921.9(15-)   E(level): Band based on (7-), α=1.
  5604.3(16+)   E(level): From (p,nγ) only. Band based on (8+), α=0.
  6086.9(17+)   E(level): Band based on (9+), α=1.

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Additional Gamma Comments:

E(level)E(gamma)Comments
    32.32    32.3E(γ): from 78Br IT decay (119.2 μs)
   204.40   204.41E(γ): Multiply placed
   242.82    46.3E(γ): 46.3γ and 46.8γ (from 227.67 level) form an unresolved doublet
   284.3   284.3E(γ): From (p,nγ) only
   292.2   292.2E(γ): From (p,nγ) only
   311.94   114.3E(γ): From (p,nγ) only
   118.74E(γ): Multiply placed
   186.5E(γ): Multiply placed
   279.62E(γ): Multiply placed
   329.52   204.41E(γ): Multiply placed
   367.4    75.0E(γ): From (p,nγ) only
   102.8E(γ): From (p,nγ) only
   334.9E(γ): From (p,nγ) only
   367.2E(γ): From (p,nγ) only
   390.9    61.0E(γ): From (p,nγ) only
    98.0E(γ): From (p,nγ) only
   186.5E(γ): Multiply placed
   358.2E(γ): From (p,nγ) only
   414.8   414.8E(γ): Multiply placed. From (p,nγ) only
   423.4   195.8E(γ): this γ most likely corresponds to 196.0 3 in 77Se(α,2npγ), 75Ge(7Li,5nγ) (1982Be03), where it is placed as a g.s. transition
   433.5   239.2E(γ): From (p,nγ) only
   447.05    80.0E(γ): From (p,nγ) only
   447.2E(γ): From (p,nγ) only
   476.93   195.0E(γ): From (p,nγ) only
   274.4E(γ): From (p,nγ) only
   279.62E(γ): Multiply placed
E(level)E(gamma)Comments
   498.5   215.0E(γ): From (p,nγ) only
   302.6E(γ): From (p,nγ) only
   526.7   159.3E(γ): From (p,nγ) only
   912.0   118.74E(γ): Multiply placed

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