ADOPTED LEVELS, GAMMAS for 32Al

Authors: Christian Ouellet, Balraj Singh |  Citation: Nucl. Data Sheets 112, 2199 (2011) |  Cutoff date: 24-Aug-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=12979 keV 13S(n)= 4215 keV 24S(p)= 15265 keV 13Q(α)= -12535 keV 16
Reference: 2012WA38

References:
  A  32Mg β- decay (86 MS)  B  33Mg β-n decay (90.5 MS)
  C  4He(32Al,32Al’X)  D  9Be(36S,xγ),(40Ar,xγ)
  E  208Pb(37Cl,xγ) 

General Comments:

1971Ar32: first evidence of 32Al formation in 232Th(40Ar,X) reaction at 290 MeV.

1982Mu08: 32Al from 9Be(40Ar,X) E=11.4 GeV, measured half-life

1984Gu19: 32Al from Ir(p,X) E=10 GeV

1995ReZZ (also 2008ReZZ): measured delayed neutrons, isotopic T1/2

2007Ka18, 2005Ue01 (also 2007Ue02): E(40Ar)=95 MeV beam produced using RIKEN accelerator. Spin polarized beam of 32Al obtained by fragmentation of 95-MeV 40Ar beam and using RIPS separator. Static quadrupole moment and magnetic moment of 32Al g.s. determined by β-NMR method. Also 2007Ka68 from the same group

2006Kh08: Cross section measurement in Si(32Al,X) E=30-65 MeV/nucleon, deduced ’reduced’ strong absorption radius= 1.23 fm2 3. The 32Al beam obtained from fragmentation of 48Ca beam with 181Ta target at GANIL facility.

1999Ai02: Cross section measurement in Si(32Al,X) E=38-80 MeV/ nucleon at NSCL facility. Deduced strong absorption radius

Others:

2007No13: 9Be(40Ar,X) E=100 MeV/nucleon, measured production σ

2006Ro34: 2H(40S,X) E=99.3 MeV/nucleon, measured production σ

1991Or01, 1987Gi05: Ta(48Ca,X) E=55 MeV/nucleon, deduced mass excess

1986Vi09 (also 1987VaZS): 232Th(p,X) E=800 MeV, measured mass to charge spectra, deduced mass excess. Measured mass by time-of-flight isochronous mass spectrometer

Nuclear structure calculations: 2004Kh16, 1994Po05

The 32Al nuclide is relevant to structure of nuclides in the "island of inversion ".

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

Q-value: S(p)=15130 90 in 2003Au03, Q(β-), S(n) and Q(α) are same as in 2011AuZZ

Q-value: Q(β-n)=3820 90, S(2n)=11330 90, S(2p)=34010 90 (2011AuZZ). S(2p)=34000 90 in 2003Au03; S(2n) and Q(β-n) are same as in 2011AuZZ










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0ABCDE 1+ 33.0 ms 2 
% β- = 100
% β-n = 0.7 5
     
   734.7 3 ABCDE (2+)      734.6 3 
   100

     0
1+
   956.6 5 ABCDE (4+) 200 ns 20 
% IT = 100
   221.9 3 
   100
[E2]
   734.7
(2+)
  1178.0 7 ABC E (4-)      221.4 5 
   100

   956.6
(4+)
  1743.3 9 ?A C        565
   787
  1743?
    67 11 
   100 11 
  ≤310



  1178.0
   956.6
     0
(4-)
(4+)
1+
  2765.1 7 ?A     1+     2030
  2765.3 9 
     6.0 13 
   100.0 22 


   734.7
     0
(2+)
1+
  3202.0 8 A     1+     2466.9 12 
  3202
   100 10 
    49 6 


   734.7
     0
(2+)
1+

E(level): From least-squares fit to Eγ’s, assuming 1 keV uncertainty when not stated

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     01+ 33.0 ms 2 
% β- = 100
% β-n = 0.7 5
μ=1.959 9 (2005Ue01,2007Ue02), Q=0.024 2 (2007Ka18,2007Ue02,2007Ka68)
Mean square radius=1.23 fm2 3 (2006Kh08 in Si(32Al,X) reaction at E=50.18 and 57.42 MeV/nucleon, also measured energy- integrated cross sections.
E(level): Mean square radius=1.23 fm2 3 (2006Kh08 in Si(32Al,X) reaction at E=50.18 and 57.42 MeV/nucleon, also measured energy- integrated cross sections.
Jπ(level): Allowed β decay (log ft=4.1-4.4) from 0+.
   734.7(2+)   XREF: B(?)C(?).
Jπ(level): Shell-model predictions (2008Hi05,2004Gr08,1997Fo01), although, the ordering of the 2+ and 4+ is reversed in calculations in the sd shell space.
   956.6(4+) 200 ns 20 
% IT = 100
XREF: B(?)C(?).
Jπ(level): Shell-model predictions (2008Hi05,2004Gr08,1997Fo01), although, the ordering of the 2+ and 4+ is reversed in calculations in the sd shell space.
  1178.0(4-)   XREF: B(?)C(?).
Jπ(level): Shell-model predictions (2008Hi05,2004Gr08,1997Fo01), although, the ordering of the 2+ and 4+ is reversed in calculations in the sd shell space.
  1743.3   XREF: C(?).
  2765.11+   Jπ(level): Allowed β decay (log ft=4.1-4.4) from 0+.
  3202.01+   Jπ(level): Allowed β decay (log ft=4.1-4.4) from 0+.

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1178.0   221.4E(γ): 221.9γ and 221.4γ are unresolved in 32Mg decay

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