ADOPTED LEVELS, GAMMAS for 64Fe

Authors: Balraj Singh and Jun Chen |  Citation: Nucl. Data Sheets 178, 41 (2021). |  Cutoff date: 12-Nov-2021 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=4823 keV 21S(n)= 7405 keV 7S(p)= 15371 keV 6Q(α)= -10486 keV 5
Reference: 2021WA16

References:
  A  64Mn β- decay (90 MS)  B  65Mn β-n decay (91.8 MS)
  C  64Ni(238U,xγ),197Au(64Ni,xγ)  D  238U(64Ni,xγ)

General Comments:

Mass measurement: 2008Bl05, 2010Fe01 (also 2011Kw02)

1980Gu09: 64Fe produced and identified in 238U(40Ar,X) reaction.

1985Ru05: 64Fe produced and identified in W(82Se,X) reaction.

1990Tu01, 1994Se12: 64Fe identified by mass separation in Th(p,f), E=800 MeV reaction followed by time-of-flight detection of fission fragments

2020Av04: 197Au(64Fe,64Fe’γ),E(64Fe)=400-440 MeV/nucleon at FAIR-GSI. Measured γ-ray yields using the AGATA array. Deduced summed E1 strength of 0.26 e2fm2 10 between 6 MeV and 8 MeV region of measured continuum γ-ray spectrum.

Theory references for structure and other topics: 33 primary references in the NSR database at www.nndc.bnl.gov

Q-value: S(2n)=12234 6, S(2p)=28695 6 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCD 0+ 2.0 s 4 
% β- = 100
     
   746.4 1 ABCD 2+ 6.8 ps 7     746.4 1 
  100
E2
     0.0
0+
  1443.6 7 A    (1,2+)      697
  1443.7
  100
    1.9


   746.4
     0.0
2+
0+
  1763.2 2 ABCD 4+ < 1.25 ps   1016.8 2 
  100
E2
   746.4
2+
  1852.8 4 AB   (1,2+)     1105.8 5 
  1853.7
  100
   36


   746.4
     0.0
2+
0+
  2117.0 5 AB   (1,2+)     1370.7 5 
  2116.7
  100
   11


   746.4
     0.0
2+
0+
  2841.0 3   CD (5-)     1077.8 2 
  100
D+Q
  1763.2
4+
  2842.1 4   CD 6+     1078.9 3 
  100
Q
  1763.2
4+
  3093.2 8 A    (0,1,2)     1240
  2347
   92
  100


  1852.8
   746.4
(1,2+)
2+
  3306.6 6 A    (1,2+)     1452.3
  2562
  3306
   27
  100
 



  1852.8
   746.4
     0.0
(1,2+)
2+
0+
  3316.8 8 A    (0,1,2)     1464
  100

  1852.8
(1,2+)
  3423.0 4    D (7-)      582.0 2 
  100

  2841.0
(5-)
  3529.0 5    D (6,7,8+)      686.9 2 
  100

  2842.1
6+
  3623.1 4    D 8+      781.0 1 
  100
Q
  2842.1
6+
  4226.8 5 A    (1,2+)      910
   920
  2110
  2374
  3480
  4226.7
   15
   45
   35
   45
  100
    2






  3316.8
  3306.6
  2117.0
  1852.8
   746.4
     0.0
(0,1,2)
(1,2+)
(1,2+)
(1,2+)
2+
0+
  4628.5 7    D (10+)     1005.4 5 
  100

  3623.1
8+

E(level): From a least-squares fit to Eγ data, assuming 1 keV uncertainty for each γ ray when not stated

Jπ(level): The assignments for states of spin >2 are based on γγ(θ) data in 238U(64Ni,Xγ), yrast sequence and similarity with yrast sequence in 72Se.

M(γ): From γγ(θ) in 238U(64Ni,Xγ), unless otherwise noted.

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Band Transitions:

E(level)
(keV)		Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 1 - Yrast cascade
     0.0 0+ 2.0 s 4 
% β- = 100
     
   746.4 1  2+ 6.8 ps 7     746.4 1 
  100
E2
     0.0
0+
  1763.2 2  4+ < 1.25 ps   1016.8 2 
  100
E2
   746.4
2+
  2842.1 4  6+     1078.9 3 
  100
Q
  1763.2
4+
  3623.1 4  8+      781.0 1 
  100
Q
  2842.1
6+
  4628.5 7  (10+)     1005.4 5 
  100

  3623.1
8+

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Additional Gamma Data:











E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityAdditional Data
   746.4 2+ 6.8 ps 7     746.4 1 E2B(E2)(W.u.)=23.6 25
  1763.2 4+ < 1.25 ps   1016.8 2 E2B(E2)(W.u.)>27

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  1443.6(1,2+)   Jπ(level): γ to 0+, g.s.
  1852.8(1,2+)   Jπ(level): γ to 0+, g.s.
  2117.0(1,2+)   Jπ(level): γ to 0+, g.s.
  3093.2(0,1,2)   Jπ(level): Possible β feeding from 1(+) parent state.
  3306.6(1,2+)   Jπ(level): γ to 0+, g.s.
  3316.8(0,1,2)   Jπ(level): Possible β feeding from 1(+) parent state.
  4226.8(1,2+)   Jπ(level): γ to 0+, g.s.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   746.4   746.4E(γ): weighted average of 746.4 1 in β-n decay, 746.4 1 and 746.0 2 in 238U(64Ni,Xγ)
M(γ): ΔJ=2, Q from γγ(θ) in 238U(64Ni,Xγ); RUL
  1763.2  1016.8E(γ): weighted average of 1017.4 3 in β-n decay, 1016.7 1 and 1016.7 3 in 238U(64Ni,Xγ)
M(γ): ΔJ=2, Q from γγ(θ) in 238U(64Ni,Xγ); RUL
  1852.8  1105.8E(γ): from β-n decay
  1853.7E(γ): from β- decay, not reported in β-n decay
  2117.0  1370.7E(γ): from β-n decay
  2116.7E(γ): from β- decay, not reported in β-n decay

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