ADOPTED LEVELS, GAMMAS for 62Co

Authors: Balraj Singh, Huang Xiaolong, and Wang Xianghan |  Citation: Nucl. Data Sheets 204, 1 (2025) |  Cutoff date: 30-Jun-2023 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=5322 keV 19S(n)= 6598 keV 19S(p)= 9793 keV 19Q(α)= -8022 keV 19
Reference: 2021WA16

References:
  A  62Fe β- decay (68 S)  B  26Mg(48Ca,3NP2AG)
  C  48Ca(18O,p3nγ)  D  62Ni(t,3He)
  E  64Ni(d,α),(pol d,α)  F  238U(70Zn,62CoG)

General Comments:

62Co produced and identified by 1949Pa01 in 64Ni(d,α) and 62Ni(n,p) reactions followed by chemical separation. Later studies: 1957Ga15, 1968Ki08, 1969Wa16, 1969Mo04, 1969Es03, 1970Jo12

Other reactions:

1995Wi09: 62Ni(n,p),E=198 MeV; measured summed Gamow-Teller strength functions up to 30 MeV excitation energy

1987Ah01: 63,65Cu(n,X),E=9,11 MeV; measured cross sections and level-density parameter

1987Gl05: 64Ni(7Li,7Be),E=78 MeV; measured σ, deduced particle-hole gross structure

1984Br03: 62Ni(n,p),E=60 MeV; measured σ(θ), deduced analog isovector resonance excitation mechanism

1984Ul01: 62Ni(n,p),E=59.6 MeV; measured σ(θ), deduced GDR analog, sum rule and blocking

1979Gr16: 66Zn(α,8B),E=109 MeV; measured σ(θ); possible observation of 62Co g.s. population.

1999Ca29 (theory): calculated levels, Jπ using shell model.

Other theory calculations: four references for structure and three for decay, retrieved form the NSR database, are listed in this dataset as ’document’ records.

Q-value: S(2n)=15917 19, S(2p)=23034 19 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
       0.0A  DEF (2)+ 1.54 m 10 
% β- = 100
     
      22 5  BCDEF (5)+ 13.86 m 9 
% IT = 0.5 5
% β- = 99.5 5
     
     230 5    DE         
     244 5    DE         
     506.10 10 A  DE  1+      506.1 1 
  100

       0.0
(2)+
     532 8    DE  1+        
     610.53 15  BCDEF (5)+      588.4 2 
  100
D+Q
      22
(5)+
     696 10    DE         
     706 10    DE  3+,4+,5+        
     863 10     E         
     910.02 18  B DE  (4+)      887.9 3 
  100
D+Q
      22
(5)+
     920 10    DE         
    1172 10    DE         
    1216.87 10  BCDEF (6+)      306.8 2 
   606.2 2 
  1194.9 1 
   18.2 23 
   29.5 23 
  100 11 
Q
D+Q
D+Q
     910.02
     610.53
      22
(4+)
(5)+
(5)+
    1248 10     E         
    1271 5    D          
    1359 5    DE  1+,2+,3+        
    1469 8    DE         
    1500 10     E         
    1542.57 14  BCDEF (7+) 1.32 ps 28     325.7 1 
  100
(M1)
    1216.87
(6+)
    1667 10    DE         
    1692 10    DE         
    1805 10    DE  (1+,2+,3+)        
    1820 10    D          
    1873 15    D          
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
    1979 10    DE         
    2079 10     E         
    2120 15    D          
    2130.3 4  B     (8+)      587.7 3 
  100
D+Q
    1542.57
(7+)
    2135 15    DE         
    2165 20    DE         
    2281.0 10  B  E  (6+)     1371 1 
  100
(Q)
     910.02
(4+)
    2308.97 17  BC  F (8+) < 0.28 ps    766.4 1 
  100
(M1)
    1542.57
(7+)
    2344 10     E  (7+)        
    2420 10     E         
    2521 10     E  (1+,2+,3+)        
    2647 10     E         
    2754 10     E         
    2798.0 3  B     (8+)      489.0 2 ?
  1581 4 
  100 33 
   33 33 
(D+Q)
(Q)
    2308.97
    1216.87
(8+)
(6+)
       2.88E3 2     E  (7+)        
       2.92E3    E         
    2960.0 20  B     (4+)      679 2 
  2050 4 
  100 33 
  100 33 
(Q)

    2281.0
     910.02
(6+)
(4+)
    3122.6 10  B     (9+)      813.6 9 
  100
(D+Q)
    2308.97
(8+)
    3155 3  B     (4,5,6+)     2245 3 
  100

     910.02
(4+)
    3169.07 20  B     (9+)      371 1 
   860.1 1 
   15 4 
  100 8 
D+Q
D+Q
    2798.0
    2308.97
(8+)
(8+)
    3331 5  B     (7+)     1050 5 
  100

    2281.0
(6+)
       3.46E3    E         
    3564.9 7  B     (9+)     1255.4 8 
  100
(D+Q)
    2308.97
(8+)
    3590 4  B     (10+)     1460 4 
  100
Q
    2130.3
(8+)
    3598.3 11  B     (9+)     1468 1 
  100
(D+Q)
    2130.3
(8+)
    3608.0 5  B     (10+)      438.9 4 
  100
D+Q
    3169.07
(9+)
    3704 4  B     (10+)     1574 4 
  100
(Q)
    2130.3
(8+)
E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
       3.79E3    E         
    3978.5 3  B     (11+)      809.4 2 
  100
Q
    3169.07
(9+)
    4048.9 4  B     (10+)      483.4 9 
   880.0 4 
  100 25 
  100 25 
D+Q
D+Q
    3564.9
    3169.07
(9+)
(9+)
       4.10E3    E         
       4.18E3 3     E  (7+)        
    4284 8  B     (12+)      694 6 
  100
(Q)
    3590
(10+)
    4304.6 14  B     (10+)     1182 1 
  100
D+Q
    3122.6
(9+)
       4.38E3 3     E  (7+)        
    4381.0 11  B     (11+)      773 1 
  100
D+Q
    3608.0
(10+)
       4.45E3 3     E  (7+)        
    4508.0 14  B     (11+)      909.7 8 
  100
Q
    3598.3
(9+)
       4.60E3 3     E  (7+)        
    4723.2 4  B     (11+)      674.4 4 
   744.7 4 
   67 33 
  100 33 
D+Q
D+Q
    4048.9
    3978.5
(10+)
(11+)
    5000.5 11  B     (12+)     1022 1 
  100
D+Q
    3978.5
(11+)
    5812.7 8  B     (12+)     1089.4 6 
  100
(D+Q)
    4723.2
(11+)
    6947.9 12  B     (13+)     1135.2 9 
  100

    5812.7
(12+)
       X B     J        
     547.0+X 3  B     J+1      547.0 3 
  100
D+Q
       X
J
    1030.5+X 5  B     J+2      483.5 3 
  100
D+Q
     547.0+X
J+1
    1686.0+X 6  B     J+3      655.5 3 
  100
D+Q
    1030.5+X
J+2
    2480.9+X 7  B     J+4      794.9 4 
  100
D+Q
    1686.0+X
J+3
    3368.9+X 7  B     J+5      888.0 2 
  100
(D+Q)
    2480.9+X
J+4
  4379+X 9  B     J+6     1010 9 
  100

    3368.9+X
J+5

E(level): From γ-ray studies when possible. Energies of levels populated only in particle-transfer reactions taken from 62Ni(t,3He) and 64Ni(d,α) for levels below 2.8 MeV, and from 64Ni(pol d,α) for higher energies. Level energies from γ-ray studies are based on fixed energy of 22 keV for the first excited state, without its stated uncertainty of 5 keV.

Jπ(level): For high-spin (J|>8), levels populated in 26Mg(48Ca,3np2αγ) and 48Ca(18O,p3nγ), generally, ascending spins with excitation energy are assumed, and ΔJ=2, quadrupole (Q) are considered as ΔJ=2, E2 and ΔJ=1,0 dipole+quadrupole as M1+E2.

M(γ): From γ(θ) and γγ(θ) data in 26Mg(48Ca,3np2αγ) (2022Se03), and from γ(θ) for four transitions in 48Ca(18O,p3nγ) (1978Wa09). Evaluators assign Q for ΔJ=2, quadrupole, and d or D+Q for ΔJ=1,0 dipole or dipole+quadrupole. As no long-lived levels have been found, ΔJ=2, quadrupole (Q) are likely ΔJ=2, E2 and ΔJ=1,0 dipole+quadrupole, likely M1+E2.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - γ cascade based on (5)+. Assignment from 26Mg(48Ca,3np2αγ) (2022Se03)
      22 5  (5)+ 13.86 m 9 
% IT = 0.5 5
% β- = 99.5 5 		     
    1216.87 10  (6+)        
    1542.57 14  (7+) 1.32 ps 28       
    2308.97 17  (8+) < 0.28 ps      
    3169.07 20  (9+)      371 1 
   860.1 1 
   15 4 
  100 8 
D+Q
D+Q
    2798.0
    2308.97
(8+)
(8+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - ΔJ=1 band based on (9+).
    3564.9 7  (9+)        
    4048.9 4  (10+)        
    4723.2 4  (11+)        
    5812.7 8  (12+)        
    6947.9 12  (13+)     1135.2 9 
  100

    5812.7
(12+)
E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 3 - ΔJ=1, magnetic-dipole (shears) band.
     547.0+X 3  J+1        
    1030.5+X 5  J+2        
    1686.0+X 6  J+3        
    2480.9+X 7  J+4        
    3368.9+X 7  J+5      888.0 2 
  100
(D+Q)
    2480.9+X
J+4
  4379+X 9  J+6        

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     230   E(level): From (t,3He).
     244   E(level): From (t,3He).
     5321+   E(level): Weighted average from (t,3He) and (d,α).
     7063+,4+,5+   E(level): From (d,α).
     910.02(4+)   XREF: E(901).
     920   E(level): From (d,α).
    1172   XREF: d(?).
E(level): From (d,α).
    13591+,2+,3+   E(level): Weighted average from (t,3He) and (d,α).
    1469   E(level): Weighted average from (t,3He) and (d,α).
    1667   E(level): Weighted average from (t,3He) and (d,α).
    1692   E(level): Weighted average from (t,3He) and (d,α).
    1805(1+,2+,3+)   E(level): Weighted average from (t,3He) and (d,α).
    1979   E(level): Weighted average from (t,3He) and (d,α).
    2135   E(level): From (t,3He).
    2281.0(6+)   XREF: E(2281).
    2344(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
       2.88E3(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
    3564.9(9+)   E(level): ΔJ=1 band based on (9+).
    4048.9(10+)   E(level): ΔJ=1 band based on (9+).
       4.18E3(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
       4.38E3(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
       4.45E3(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
       4.60E3(7+)   Jπ(level): From comparison of experimental σ(θ) and Ay(θ) distributions in (pol d,α) with empirical patterns for L=6 and J=7 (1988Na01).
    4723.2(11+)   E(level): ΔJ=1 band based on (9+).
    5812.7(12+)   E(level): ΔJ=1 band based on (9+).
E(level)Jπ(level)T1/2(level)Comments
    6947.9(13+)   E(level): ΔJ=1 band based on (9+).
     547.0+XJ+1   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.
    1030.5+XJ+2   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.
    1686.0+XJ+3   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.
    2480.9+XJ+4   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.
    3368.9+XJ+5   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.
  4379+XJ+6   E(level): ΔJ=1, magnetic-dipole (shears) band.
Jπ(level): ΔJ=1, D+Q for the in-band transitions in the proposed magnetic-dipole (shears) band.

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Additional Gamma Comments:

E(level)E(gamma)Comments
     506.10     506.1E(γ): from 62Fe β- decay.
    1216.87     306.8E(γ): γ from (48Ca,3np2αγ) only
    1542.57     325.7M(γ): from γγ(θ) and RUL
    2308.97     766.4M(γ): from γγ(θ) and RUL
    2798.0     489.0M(γ): ΔJ=0 transition
    4723.2     744.7M(γ): ΔJ=0 transition

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