ADOPTED LEVELS, GAMMAS for 116Cs

Author: Jean Blachot |  Citation: Nucl. Data Sheets 111, 717 (2010) |  Cutoff date: 1-Dec-2009 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-7.4×103 keV SYS(n)= 1.04×104 keV SYS(p)= 7.0×102 keV SYQ(α)= 2.58×103 keV SY
Reference: 2012WA38

References:
  A  116Ba ε decay (1.3 S)  B  58Ni(64Zn,APNG)

General Comments:

Two 116Cs isomers have been identified from (β+)-delayed proton, (β+)-delayed α, and β+ decay studies. Their relative position is not known.

Delayed-p and α from 116Cs β+ decay (3.8 s):

from 139La(p,X) E=600 MeV, ms (1978Da07,1978Ka17,1974RaZS). Measurements: T1/2=3.5 s 2 %I(delayed-p)/I(β+)=0.36 8 %I(delayed-α)/I(β+)=8×10-3 2 Q(ε)-s(p)(116Xe)=6.45 MeV 30 Q(ε)+Q(α)(116Xe)=12.5 MeV

from 92Mo(32S,3p5n) E=190 MeV, ms (1977Bo28,1976Bo36). Measurements: T1/2=3.9 s 4 %I(delayed-p)/I(β+)=0.66 13 %I(delayed-α)/I(β+)|<3.3×10-3 Q(ε)-S(p)(116Xe)=6.4 MeV 3

from 58Ni,63Cu(58Ni,xpn). E=290 MeV, ms (1985Ti02) Measurement: T1/2=4.0 s 3 I(delayed-p)/I(delayed-a)=200 80 Delayed-p and α from 116Cs β+ decay (0.7 s):

from 92Mo(32S,3p5n) E=190 MeV, ms (1977Bo28). Measurements: T1/2=0.65 s 10 %I(delayed-p)/I(β+)=0.28 7 %I(delayed-α)=4.9×10-2 25 Q(ε)+Q(α)(116Xe)=12.3 MeV 4

from 58Ni,63Cu(58Ni,xpn). E=290 MeV, ms (1985Ti02,1982Ti05) Measurement: T1/2=0.6 s 1 I(delayed-p)/I(delayed-γ)=16 4

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

Q-value: Estimated uncertainties from 2003Au03: ΔQ-=410, ΔSN=320, ΔSP=100, ΔQA=230

Q-value: Q(εp)=6980 110 (syst,2003Au03)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
      0A  (1+) 0.70 s 4 
% ε = 100
% εp = 2.8 7
% εα = 0.049 25
     
    100 Syst.    4+,5,6 3.85 s 13 
% ε = 100
% εp = 0.51 15
% εα = 0.008 2
     
    0+X B        
    191.8+X 1  B      191.8 1 
  100

    0+X

    416.9+X 2  B (8+)      225.1 1 
  100

    191.8+X

  457+X B        
    633.1+X 2 A  (10+)      176 1 ?
   216.2 1 
   442 1 ?
    7.8 16 
  100 5 
   16 5 



  457+X
    416.9+X
    191.8+X

(8+)

    875.8+X 7  B (11+)      243 1 
  100
M1+E2
    633.1+X
(10+)
   1076.3+X 2  B (12+)      443.2 1 
  100
E2
    633.1+X
(10+)
   1318.6+X 6  B (13+)      243 1 
   442.8 1 
  <57
  100 11 
M1+E2
E2
   1076.3+X
    875.8+X
(12+)
(11+)
   1726.3+X 2  B (14+)      650.0 1 
  100
E2
   1076.3+X
(12+)
   1953.4+X 7  B (15+)      226 1 
   634.8 1 
   42 8 
  100 8 
M1+E2
E2
   1726.3+X
   1318.6+X
(14+)
(13+)
   2537.3+X 3  B (16+)      811.0 2 
  100
E2
   1726.3+X
(14+)
   2727.9+X 7  B (17+)      189 1 ?
   774.5 1 
   38 5 
  100 10 

E2
   2537.3+X
   1953.4+X
(16+)
(15+)
   3462.8+X 5  B (18+)      925.5 4 
  100
E2
   2537.3+X
(16+)
   3601.0+X 7  B (19+)      873.1 1 
  100
E2
   2727.9+X
(17+)
   4481.5+X 6  B (20+)     1018.7 2 
  100
E2
   3462.8+X
(18+)
   4543.3+X 7  B (21+)      942.3 1 
  100
E2
   3601.0+X
(19+)
   5480.0+X 6  B (22+)      998.5 2 
  100
E2
   4481.5+X
(20+)
E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
   5530.0+X 7  B (23+)      986.7 2 
  100
E2
   4543.3+X
(21+)
   6463.7+X 7  B (24+)      983.7 4 
  100

   5480.0+X
(22+)
   6583.8+X 8  B (25+)     1053.8 4 
  100

   5530.0+X
(23+)
   7533.1+X 8  B (26+)     1069.4 4 ?
  100

   6463.7+X
(24+)
   7751.6+X 9  B (27+)     1167.8 4 
  100

   6583.8+X
(25+)
   9016.3+X 10  B (29+)     1264.7 4 ?
  100

   7751.6+X
(27+)
  10381.4+X 11  B (31+)     1365.1 4 ?
  100

   9016.3+X
(29+)

E(level): From least-squares fit to Eγ’s

Jπ(level): As proposed by 2006Sm04 based on angular distribution data, long cascades of stretched quadrupole transitions and systematics of neighboring Cs nuclides

M(γ): From γ-ray angular distribution data in 58Ni(64Zn,2pnγ). The mult=E2 corresponds to ΔJ=2 and M1+E2 to ΔJ=1 transitions

Back to top

Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - νh11/2~#πh11/2, α=0
    416.9+X 2  (8+)        
    633.1+X 2  (10+)        
   1076.3+X 2  (12+)        
   1726.3+X 2  (14+)      650.0 1 
  100
E2
   1076.3+X
(12+)
   2537.3+X 3  (16+)      811.0 2 
  100
E2
   1726.3+X
(14+)
   3462.8+X 5  (18+)        
   4481.5+X 6  (20+)     1018.7 2 
  100
E2
   3462.8+X
(18+)
   5480.0+X 6  (22+)      998.5 2 
  100
E2
   4481.5+X
(20+)
   6463.7+X 7  (24+)      983.7 4 
  100

   5480.0+X
(22+)
   7533.1+X 8  (26+)     1069.4 4 ?
  100

   6463.7+X
(24+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - νh11/2~#πh11/2, α=1
    875.8+X 7  (11+)        
   1318.6+X 6  (13+)        
   1953.4+X 7  (15+)        
   2727.9+X 7  (17+)      189 1 ?
   774.5 1 
   38 5 
  100 10 

E2
   2537.3+X
   1953.4+X
(16+)
(15+)
   3601.0+X 7  (19+)      873.1 1 
  100
E2
   2727.9+X
(17+)
   4543.3+X 7  (21+)        
   5530.0+X 7  (23+)      986.7 2 
  100
E2
   4543.3+X
(21+)
   6583.8+X 8  (25+)     1053.8 4 
  100

   5530.0+X
(23+)
   7751.6+X 9  (27+)     1167.8 4 
  100

   6583.8+X
(25+)
   9016.3+X 10  (29+)     1264.7 4 ?
  100

   7751.6+X
(27+)
  10381.4+X 11  (31+)     1365.1 4 ?
  100

   9016.3+X
(29+)

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
      0(1+) 0.70 s 4 
% ε = 100
% εp = 2.8 7
% εα = 0.049 25
Decay branches taken from 2003Au02 evaluation.
    1004+,5,6 3.85 s 13 
% ε = 100
% εp = 0.51 15
% εα = 0.008 2
Decay branches taken from 2003Au02 evaluation.
    416.9+X(8+)   E(level): νh11/2~#πh11/2, α=0.
    633.1+X(10+)   E(level): νh11/2~#πh11/2, α=0.
    875.8+X(11+)   E(level): νh11/2~#πh11/2, α=1.
   1076.3+X(12+)   E(level): νh11/2~#πh11/2, α=0.
   1318.6+X(13+)   E(level): νh11/2~#πh11/2, α=1.
   1726.3+X(14+)   E(level): νh11/2~#πh11/2, α=0.
   1953.4+X(15+)   E(level): νh11/2~#πh11/2, α=1.
   2537.3+X(16+)   E(level): νh11/2~#πh11/2, α=0.
   2727.9+X(17+)   E(level): νh11/2~#πh11/2, α=1.
   3462.8+X(18+)   E(level): νh11/2~#πh11/2, α=0.
   3601.0+X(19+)   E(level): νh11/2~#πh11/2, α=1.
   4481.5+X(20+)   E(level): νh11/2~#πh11/2, α=0.
   4543.3+X(21+)   E(level): νh11/2~#πh11/2, α=1.
   5480.0+X(22+)   E(level): νh11/2~#πh11/2, α=0.
   5530.0+X(23+)   E(level): νh11/2~#πh11/2, α=1.
   6463.7+X(24+)   E(level): νh11/2~#πh11/2, α=0.
   6583.8+X(25+)   E(level): νh11/2~#πh11/2, α=1.
   7533.1+X(26+)   E(level): νh11/2~#πh11/2, α=0.
   7751.6+X(27+)   E(level): νh11/2~#πh11/2, α=1.
   9016.3+X(29+)   E(level): νh11/2~#πh11/2, α=1.
  10381.4+X(31+)   E(level): νh11/2~#πh11/2, α=1.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
    191.8+X    191.8M(γ): stretched Q suggested by γ-ray angular distribution
    416.9+X    225.1M(γ): stretched Q or unstretched mixed D+Q
    875.8+X    243E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity
   1318.6+X    243E(γ): Multiply placed with undivided intensity
I(γ): Multiply placed with undivided intensity

Back to top