ADOPTED LEVELS, GAMMAS for 46Cr

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 20-FEB-2010 

Author: S. -c. Wu |  Citation: Nucl. Data Sheets 91, 1 (2000) |  Cutoff date: 15-Jul-2000 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=-1.65×104 keV SYS(n)= 1.803×104 keV 4S(p)= 4882 keV 22Q(α)= -6794 keV 20
Reference: 2012WA38

References:
  A  46Mn ε decay (36.2 MS)  B  47Fe εp decay (21.9 MS)
  C  12C(36Ar,2nγ)  D  Coulomb Excitation

General Comments:

Mass excess=-29.472 20 MeV (1992Bo37).

1972Zi02: identification and production of 46Cr in 32S(16O,2n) reaction

1991Wi13: 46Ti(π+-) E=450 MeV, measured cross section for double isobaric analog state using LAMPF facility and Large Acceptance spectrometer (las). Measured dσ/d|W=0.25 μb/sr 10 at 5|’

1990We05: 46Ti(π+-) E=33.9 MeV, measured cross section and σ(θ) for double isobaric analog state using LAMPF facility, Measured dσ/d|W=3.1 μb/sr 8 at 0|’ and 2.5 μb/sr 6 at 25.1|’

1994Bl10: 9Be(58Ni,X) E=650 MeV/nucleon, Fragment separator FRS at GSI facility, measured cross section for the production of 46Cr

2005On03: measured half-life of 46Cr g.s.

Structure calculations using shell model: 2008Ma44, 2007He32, 2002Ca48: levels, B(E2), mirror states, etc.

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

Q-value: Estimated uncertainty=110 for Q(β-) (2009AuZZ,2003Au03)

Q-value: Q(εp)=2243 20 (2009AuZZ,2003Au03)










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABCD 0+ 0.26 s 6 
% ε = 100
     
   892.16 10 ABCD 2+ 5.4 ps 12     892.15 10 
  100
[E2]
     0.0
0+
  1987.1 3 ABC  (4+)     1094.9 3 
  100

   892.16
2+
  3196.5 6  BC  (3-)     2304.6 7 
  100
D
   892.16
2+
  3226.9 6   C  (6+)     1239.9 5 
  100
Q
  1987.1
(4+)
  3296 3   C      2404 3 
  100

   892.16
2+
  3494.3 7   C      1506.9 8 
  100

  1987.1
(4+)
  3593.7 7   C  (4-)      397.4 6 
  1605.3 15 
  100 13 
   75 19 
D

  3196.5
  1987.1
(3-)
(4+)
  3682.2 16   C      1695.0 15 
  100

  1987.1
(4+)
  3715.8 9   C       519.3 6 
  100

  3196.5
(3-)
  3778.1 12   C       581.7 11 
  1790 3 
   50 30 
  100 60 


  3196.5
  1987.1
(3-)
(4+)
  3986.7 7   C  (5-)      393.0 15 
   492.3 7 
   760.3 10 
   790.1 8 
   12 7 
   60 11 
   43 13 
  100 22 



Q
  3593.7
  3494.3
  3226.9
  3196.5
(4-)

(6+)
(3-)
  4235 3   C      2248 3 
  100

  1987.1
(4+)
  4305.5 12   C       711.8 9 
  100

  3593.7
(4-)
  4434.4 10   C       841.0 22 
  1207.4 9 
   22 13 
  100 17 


  3593.7
  3226.9
(4-)
(6+)
  4817.4 8   C  (8+)     1590.4 6 
  100

  3226.9
(6+)
  4830 3   C  (6-)     1236 3 
  100

  3593.7
(4-)
  5117 4   C      1401 3 
  100

  3715.8

  5346 3   C  (7-)     1359 3 
  100

  3986.7
(5-)
  6179.5 11   C  (10+)     1362.1 7 
  100

  4817.4
(8+)
  8162.5 15 ?  C  (12+)     1983.0 10 ?
  100

  6179.5
(10+)
  9152 24 A    (4+)        

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

Jπ(level): As proposed in 2007Ga03 based on γ(θ) data for selected transitions observed in 12C(36Ar,2nγ) and mirror analogy with 46Ti and 46V

E(γ): From 12C(36Ar,2nγ), 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 - Yrast (T=1) band.
     0.0 0+ 0.26 s 6 
% ε = 100
     
   892.16 10  2+ 5.4 ps 12     892.15 10 
  100
[E2]
     0.0
0+
  1987.1 3  (4+)     1094.9 3 
  100

   892.16
2+
  3226.9 6  (6+)     1239.9 5 
  100
Q
  1987.1
(4+)
  4817.4 8  (8+)     1590.4 6 
  100

  3226.9
(6+)
  6179.5 11  (10+)     1362.1 7 
  100

  4817.4
(8+)
  8162.5 15  (12+)     1983.0 10 ?
  100

  6179.5
(10+)
E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)M(γ)Final Levels
Band 2 - ΔJ=1 band based on (3-)
  3196.5 6  (3-)        
  3593.7 7  (4-)      397.4 6 
  1605.3 15 
  100 13 
   75 19 
D

  3196.5
  1987.1
(3-)
(4+)
  3986.7 7  (5-)      393.0 15 
   492.3 7 
   760.3 10 
   790.1 8 
   12 7 
   60 11 
   43 13 
  100 22 



Q
  3593.7
  3494.3
  3226.9
  3196.5
(4-)

(6+)
(3-)
  4830 3  (6-)     1236 3 
  100

  3593.7
(4-)
  5346 3  (7-)     1359 3 
  100

  3986.7
(5-)

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Additional Gamma Data:











E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityAdditional Data
   892.16 2+ 5.4 ps 12     892.15 10 [E2]B(E2)(W.u.)=19 4

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 0.26 s 6 
% ε = 100
E(level): Yrast (T=1) band.
   892.162+ 5.4 ps 12  E(level): Yrast (T=1) band.
  1987.1(4+)   E(level): Yrast (T=1) band.
  3196.5(3-)   E(level): ΔJ=1 band based on (3-).
  3226.9(6+)   E(level): Yrast (T=1) band.
  3593.7(4-)   E(level): ΔJ=1 band based on (3-).
  3986.7(5-)   E(level): ΔJ=1 band based on (3-).
  4817.4(8+)   E(level): Yrast (T=1) band.
  4830(6-)   E(level): ΔJ=1 band based on (3-).
  5346(7-)   E(level): ΔJ=1 band based on (3-).
  6179.5(10+)   E(level): Yrast (T=1) band.
  8162.5(12+)   E(level): Yrast (T=1) band.
  9152(4+)   T=2
This state decays mainly by proton emission, but only 17.3% 12 branch is so far accounted in measurements of 2007Do17 and 1992Bo37. Energetically, two-proton and α-decay modes are also possible but these are expected to be small (2007Do17).

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