ADOPTED LEVELS, GAMMAS for 86Rb

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-)=1776.2 keV 11S(n)= 8651.0 keV 2S(p)= 8555.7 keV 20Q(α)= -7674.6 keV 13
Reference: 2012WA38

References:
  A  86Rb IT decay (1.017 M)  B  82Se(7Li,3nγ)
  C  84Kr(3He,p)  D  85Rb(n,γ) E=THERMAL
  E  85Rb(n,n),(n,γ):Resonances  F  85Rb(d,p)
  G  87Rb(d,t)  H  87Rb(3He,α)
  I  87Rb(γ,n)  J  87Sr(d,3He)
  K  88Sr(d,α) 

General Comments:

86Rb first produced by 1937Sn02, later confirmed by 1941He02. α 1-min isomer identified by 1951Fl17

Mass measurement: 1994Ot01 (Penning-Trap method)

Levels: There are 290 neutron resonances known from E(n)(lab)=175.6 eV to 19.08 keV, corresponding to excitation energy range of 8651.2 to 8669.9 keV. See 85Rb(n,γ):resonances dataset for energies and resonance parameters taken from 2006MuZX. Original source of these are 1984Oh05 (E(n)<18.5 keV), 1973Mu20 (E(n)=18-28 keV)

Levels: Low-lying negative-parity states are expected to be members of the π2p3/2-1~#ν1g9/2-1 and π1f5/2-1~#ν1g9/2-1 multiplets. Since 87Rb g.s. configuration=π2p3/2-1~#π1f5/2+6 and 85Rb g.s. configuration=π2p3/2+4~#π1f5/2-1, the first multiplet is expected to be strongly populated in 87Rb(3He,α) and 87Rb(d,t) reactions, whereas the second multiplet is expected to be populated in 85Rb(d,p). States belonging to the first multiplet have been identified with reasonable certainty and are in agreement with shell-model calculations (1969Da15), whereas the members of the second multiplet cannot be identified unambiguously. For further remarks see 1969Da15, 1972Ho44, 1972Ko37, 1977HeYQ, and 1975Du02 (for configuration mixing effects).

Q-value: S(2n)=19130.7 22, S(2p)=19542 26 (2012Wa38)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCD FG IJK 2- 18.642 d 18 
% β- = 99.9948 5
% ε = 0.0052 5
     
   488.2 4  BCD FGH  K 1+ 2.4 ps 3     487.9 5 
   100
[E1]
     0.0
2-
   556.05 18 AB D FGH JK 6- 1.017 m 3 
% IT = 100
% β- < 0.3
   556.07 18 
   100
(E4)
     0.0
2-
   557.0 3    D FGH JK (3)-      557.0 5 
   100

     0.0
2-
   780.3 3  B D F   JK (7)-      224.3 1 
   100
D+Q
   556.05
6-
   873.2 4    D FGH JK 3-,4-      315.9 5 
   873.2 5 
     4 1 
   100 27 


   557.0
     0.0
(3)-
2-
   978.7 5    D FGH JK 3-,4-      421.5 5 
   100

   557.0
(3)-
  1027.2 4   CD FGH  K 1+,2+,3+      538.9 5 
  1026.9 5 
    41 13 
   100 24 


   488.2
     0.0
1+
2-
  1032.7 5    D     J  (3,4)-     1032.8 5 ?
   100

     0.0
2-
  1092.8 4    D FGHIJK (5)-      114.1 5 
   536.7 5 
    42 13 
   100 32 


   978.7
   556.05
3-,4-
6-
  1105.6 5    D  G   K (2,3)+      232.4 10 
  1105.7 10 
     4 2 
   100 32 


   873.2
     0.0
3-,4-
2-
  1122 2       G     (LE 3)+        
  1156 2       G     (0)+        
  1196.4 5    D FG  JK (3,4)-       89.6 15 
   323.1 5 
   639.4 5 
    40 20 
   100 40 
  <580



  1105.6
   873.2
   557.0
(2,3)+
3-,4-
(3)-
  1248.0 11    D FG IJK 4-      691.9 10 
   100

   556.05
6-
  1305.1 4    D  G   K 3+      198.8 10 
   525.2 10 ?
   748.6 10 
   817.3 15 
  1305.4 5 
   <14
     8 4 
    12 4 
    14 4 
   100 31 

[M4]



  1105.6
   780.3
   557.0
   488.2
     0.0
(2,3)+
(7)-
(3)-
1+
2-
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  1309 3    D F           530.0 10 ?
   100

   780.3
(7)-
  1389.4 5   CD FG   K (3)+       85.9 15 
   284.4 10 
   361.8 5 
  1390.2 10 
    60 25 
    15 5 
   <70
   100 25 




  1305.1
  1105.6
  1027.2
     0.0
3+
(2,3)+
1+,2+,3+
2-
  1412 2   C   GH JK 4-,5-,6-        
  1439.0 5   CD FGH JK 3-,4-      564.9 10 
   882.0 5 
  1440.0 10 
    43 14 
   100 36 
    71 21 



   873.2
   557.0
     0.0
3-,4-
(3)-
2-
  1470.8 6    D FG     (2,3)+      165.7 5 ?
   913.8 10 
   100 25 
    95 25 


  1305.1
   557.0
3+
(3)-
  1501.7 10    D FG I K (3)+      945.6 10 
   100

   557.0
(3)-
  1550 2      FG  JK 4-,5-,6-        
  1558.5 3  B          (7+)      778.1 3 
  1002.4 3 
   100 10 
    19 2 
D
D
   780.3
   556.05
(7)-
6-
  1666.8 4    D  GH  K (1,2,3)+        
  1683.7 3  B          (8+)      125.2 1 
   903.6 3 
   100 10 
    10 1 
M1
D
  1558.5
   780.3
(7+)
(7)-
  1709.2 11   CD FG  JK (1,2,3)+        
  1738 3      F   J  (-)        
  1761 2       G   K (1)+        
  1820.0 6    D F  I K (3+,4,5-)        
  1889.3 10    D  G I K 1+,2+,3+        
  1901 4      F             
  1917.1 15   CD  G   K        
  1926.1 18   CD FG   K        
  1953.1 16    D               
  2024.9 24      F    K        
  2093 3   C  F      1+        
  2130.0 10    D   H  K (-)        
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  2149.7 10   CD      K (1,2,3)+        
  2179.7 6   CD F      (1+,2+,3+)        
  2255 3           K (5+,6+,7+)        
  2265.9 7    D      K        
  2282 4      F             
  2298.9 6   CD      K        
  2331.8 18    D F             
  2352.5 10    D               
  2369 4      F             
  2403.4 19    D      K        
  2416.5 4  B        K (9+) 0.28 ps 7     732.8 1 
   100
D
  1683.7
(8+)
  2437 4      F             
  2462.2 6   CD      K        
  2475.7 10    D               
  2508.2 9   CD      K (3+)        
  2534 4           K (1,2,3)+        
  2570.4 10    D               
  2585.7 10    D               
  2598.1 10   CD      K 1+        
  2671.0 5   CD        (1,2,3)+        
  2719.0 7    D               
  2765.5 5    D      K        
  2810.4 9    D               
  2827.9 20 ?  CD               
  2850.4 7    D               
  2890.1 5   CD               
  2951 4           K 1+        
  2992 5   C         (2-)        
  3113 5   C         1+        
  3137.5 4  B          (9+) 0.55 ps 14    1453.7 3 
   100

  1683.7
(8+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  3205 5   C         1+        
  3242 5   C         (0-,1-,2-)        
  3271 5           K        
  3282.0 4  B          (10+) 0.69 ps 14     144.4 3 
   865.4 3 
  1598.2 3 
    14 2 
    89 11 
   100 11 
M1
D
(E2)
  3137.5
  2416.5
  1683.7
(9+)
(9+)
(8+)
  3319 10   C       K 1+        
  3411.9 4  B          (11+) 5.5 ps 14     129.9 1 
   995.4 3 
   100 9 
     7 1 
M1
[E2]
  3282.0
  2416.5
(10+)
(9+)
  3445 5   C         (1)        
  3510 5   C         (1+)        
  3578.4 4  B          (10+) 0.28 ps +7-14    1161.8 3 
  1894.7 3 
   100 10 
    24 4 
D
[E2]
  2416.5
  1683.7
(9+)
(8+)
  3707 5   C                
  3743.4 4  B          (12+) 1.32 ps 14     331.5 1 
   100
M1
  3411.9
(11+)
  3763 7   C         (1,2,3)+        
  3824 5   C                
  3866.1 5  B          (11+) 1.25 ps 35     287.7 3 
   100
D
  3578.4
(10+)
  3896 6   C         (1+)        
  4078 5   C         (2-)        
  4221 5   C         1+        
  4266 8   C         (1,2,3)+        
  4548 5   C         (1,2,3)+        
  4717.1 5  B          (13+) 0.08 ps +4-5     973.7 3 
   100
D
  3743.4
(12+)
  5293.6 5  B          (12-) 0.35 ps +7-14    1427.5 3 
  1881.7 3 
     9 1 
   100 16 

D
  3866.1
  3411.9
(11+)
(11+)
  5557.4 5  B          (13-) 0.76 ps +14-21     263.8 3 
  1814.1 3 
   100 15 
    90 13 
D
D
  5293.6
  3743.4
(12-)
(12+)
  6113.6 6  B          (14-) 0.28 ps +7-14     556.2 3 
   100
D
  5557.4
(13-)
  6455.8 6  B          (14+) 0.035 ps +42-28    1738.7 3 
   100
(D)
  4717.1
(13+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
  6799.6 6  B          (15-) 0.21 ps +7-14     685.9 3 
   100
D
  6113.6
(14-)
  7413.1 7  B          (15) 0.42 ps +7-14     957.3 3 
   100
D
  6455.8
(14+)
  7860.1 7  B          (16) 0.69 ps +14-21     447.0 3 
   100
D
  7413.1
(15)
  8651.0 10 S   D        2-,3-     5760.7 5 
  5800.4 7 
  5823.2 20 ?
  5840.8 9 
  5885.7 5 
  5932.3 7 
  5980.2 5 
  6052.9 8 
  6064.5 5 
  6081.9 12 
  6142.7 8 
  6173.3 15 
  6188.7 5 
  6247.5 18 
  6297.7 15 
  6319.1 17 
  6352.0 5 
  6385.0 6 
  6471.2 5 
  6503.2 7 
  6520.3 5 
  6697.8 15 
  6724.8 17 
  6735.5 25 
  6759.4 15 
  6831.4 5 
  6943.0 7 
  7180.7 10 
  7211.8 6 
  7261.2 6 
  7345.8 5 
  7455.3 10 
  7544.0 7 
  7623.9 4 
  7672.2 9 
  7776.1 20 
  8093.8 5 
  8161.5 15 
  8650.7 7 
    47 12 
    16 5 
     1.5 5 
     7.3 34 
    20 5 
     5.9 20 
    35 7 
    13 3 
    41 7 
     5.4 20 
     8.8 25 
     5.9 20 
    33 7 
     3.4 15 
     4.4 15 
     3.4 15 
    19 5 
    21 5 
    33 8 
    16 4 
    57 12 
     9.3 25 
     8.3 20 
     5.4 20 
     8.3 25 
    54 12 
     9.8 25 
     5.4 20 
    15 3 
    12 3 
    54 12 
     6.3 20 
    12 3 
   100 20 
     5.9 20 
     2.0 10 
    15 5 
     3.9 15 
    17 4 







































  2890.1
  2850.4
  2827.9
  2810.4
  2765.5
  2719.0
  2671.0
  2598.1
  2585.7
  2570.4
  2508.2
  2475.7
  2462.2
  2403.4
  2352.5
  2331.8
  2298.9
  2265.9
  2179.7
  2149.7
  2130.0
  1953.1
  1926.1
  1917.1
  1889.3
  1820.0
  1709.2
  1470.8
  1439.0
  1389.4
  1305.1
  1196.4
  1105.6
  1027.2
   978.7
   873.2
   557.0
   488.2
     0.0






(1,2,3)+
1+


(3+)







(1+,2+,3+)
(1,2,3)+
(-)



1+,2+,3+
(3+,4,5-)
(1,2,3)+
(2,3)+
3-,4-
(3)+
3+
(3,4)-
(2,3)+
1+,2+,3+
3-,4-
3-,4-
(3)-
1+
2-

E(level): From least-squares fit to Eγ values wherever possible. See (3He,p) for some additional tentative levels and associated L-transfers

Jπ(level): Primary γ from 2-,3- limits Jπ to 0- to 5-. For high-spin states, positive parity is from systematics while negative parity is from a comparison with shell-model calculations

T1/2(level): From DSAM in 82Se(7Li,3nγ), except as noted otherwise.

M(γ): From γ(θ), γγ(θ)(DCO) and γ(lin pol) in (7Li,3nγ)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   488.2 1+ 2.4 ps 3     487.9 5 [E1]B(E1)(W.u.)=0.0012 2
   556.05 6- 1.017 m 3 
% IT = 100
% β- < 0.3
   556.07 18 (E4)0.0183B(E4)(W.u.)=1.455 6, α=0.0183, α(K)=0.01577 23, α(L)=0.00216 3, α(M)=0.000359 5, α(N)=3.87E-5 6, α(O)=1.353E-6 19, α(N+)=4.00E-5 6
  1683.7 (8+)      125.2 1 M10.0783α=0.0783, α(K)=0.0691 10, α(L)=0.00777 11, α(M)=0.001286 19, α(N)=0.0001452 21, α(O)=6.17×10-6 9, α(N+)=0.0001513 22
  3282.0 (10+) 0.69 ps 14     144.4 3 M10.0534B(M1)(W.u.)=0.73 19, α=0.0534, α(K)=0.0471 7, α(L)=0.00528 8, α(M)=0.000873 14, α(N)=9.86×10-5 15, α(O)=4.20E-6 7, α(N+)=0.0001028 16
(10+) 0.69 ps 14    1598.2 3 (E2)B(E2)(W.u.)=1.7 5
  3411.9 (11+) 5.5 ps 14     129.9 1 M10.0709B(M1)(W.u.)=1.7 5, α=0.0709, α(K)=0.0626 9, α(L)=0.00703 10, α(M)=0.001163 17, α(N)=0.0001313 19, α(O)=5.58×10-6 8, α(N+)=0.0001369 20
(11+) 5.5 ps 14     995.4 3 [E2]B(E2)(W.u.)=0.31 +11-7
  3578.4 (10+) 0.28 ps +7-14    1894.7 3 [E2]B(E2)(W.u.)=0.7 +7-2
  3743.4 (12+) 1.32 ps 14     331.5 1 M10.00634B(M1)(W.u.)=0.46 5, α=0.00634 9, α(K)=0.00561 8, α(L)=0.000613 9, α(M)=0.0001013 15, α(N)=1.148×10-5 16, α(O)=4.96E-7 7, α(N+)=1.198E-5 17

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.02- 18.642 d 18 
% β- = 99.9948 5
% ε = 0.0052 5
μ=-1.6977 16 (1981Th04,2014StZZ), Q=+0.23 6 (1981Th04,2013StZZ,2014StZZ)
RMS charge radius <r2>1/2=4.2025 fm 23 (2013An02).
  2179.7(1+,2+,3+)   XREF: C(2173).
  2508.2(3+)   XREF: K(2498).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   556.05   556.07E(γ): from 86Rb IT decay
M(γ): E4 or (M3) from α(K)exp and α(exp) measured in IT decay (1969Sc10); M3 ruled out by ΔJ.
  1196.4   639.4E(γ): probable double placement (see (n,γ))
  1305.1   525.2E(γ): transition to (7)- with implied multipolarity of M4 is considered highly suspect
  1389.4   361.8E(γ): probable double placement. See (n,γ)
  3866.1   287.7M(γ): RUL marginally favors M1 over E1
  5557.4   263.8M(γ): RUL marginally favors M1 over E1

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