ADOPTED LEVELS, GAMMAS for 33Mg

Authors: Jun Chen and Balraj Singh |  Citation: Nucl. Data Sheets 112, 1393 (2011) |  Cutoff date: 31-Mar-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1.343×104 keV 8S(n)= 2280 keV 5S(p)= 2.114×104 keV 12Q(α)= -1.586×104 keV 10
Reference: 2012WA38

References:
  A  33Na β- decay (8.0 MS)  B  34Na β-n decay (5.5 MS)
  C  1H(33Mg,33Mg’γ),(34Mg,33MgG)  D  9Be(36Si,33MgG)
  E  197Au(33Mg,33Mg’γ) 

General Comments:

Identification: 1984Gu19: In(p,X) E=10 GeV, measured γ, isotopic half-life.

Later studies of 33Mg isotope (mass measurements and decay properties): 1991Zh24, 1991Or01, 2001Nu02, 2002Ra16, 2002Mo29, 2006Ga04

Measured mass excess=4947 22 keV (radio-frequency mass spectrometer, MISTRAL at ISOLDE facility: 2006Ga04,2006Lu09)

2007Yo06: 33Mg and 31Mg produced by bombarding a uranium carbide target with 1.4 GeV proton beam at ISOLDE-CERN facility followed by laser ionization to select Mg isotopes The radioactive beam of Mg ions was accelerated to 40 keV, sent through a mass analyzer and then to a collinear laser spectroscopy arrangement for the measurement of spin and magnetic moment by laser spectrometry and nuclear magnetic resonance. Measurements are made relative to 31Mg

2006Kh08: Cross section measurement in Si(33Mg,X) E=30-65 MeV/nucleon, deduced ’reduced strong absorption radius= 1.260 fm2 19. The 33Mg beam obtained from fragmentation of 48Ca beam with 181Ta target at GANIL facility.

Nearly pure 2p-2h configuration deduced from g-factor, evidence for this nucleus being in the middle of the "island of inversion "

Structure calculations: 1994Po05

2010Ka05: Measured the longitudinal momentum distribution of one neutron removal from 33Mg in ground state and the one-neutron removal cross-section, 74 4 mb.

2010Yo08: 33Mg produced at ISOLDE-CERN by 1.4 GeV protons impinging on a thick uranium-carbide target. Measured hyperfine structure and nuclear gyromagnetic ratio by combining laser spectroscopy with nuclear magnetic resonance.

2010Yo01, 2010Tr03: comments on 2008Tr07 for ground state parity of 33Mg

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

Q-value: Q(β-n)=7937 89 (2009AuZZ), 7880 90 (2003Au03)









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)Final Levels
     0ABCDE 3/2- 90.5 ms 16 
% β- = 100
% β-n = 14 2
    
   484.1 1 A CDE (3/2-)      484.1 1 
  100
     0
3/2-
   546.2 1 A C        546.2 1 
  100
     0
3/2-
   705.0 1 A     (1/2+,3/2+,5/2+)      221.0 1 
   704.9 1 
  <38
  100 9 
   484.1
     0
(3/2-)
3/2-
  1242.4 1 A  D  (1/2+,3/2,5/2)      758.2 1 
  1242.8 2 
   86 10 
  100 27 
   484.1
     0
(3/2-)
3/2-
  3780A           
  4000A           

Jπ(level): All assignments are tentative

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     03/2- 90.5 ms 16 
% β- = 100
% β-n = 14 2
μ=-0.7456 5 (2007Yo06)
Matter radius (rms)=3.19 fm 3 (2011Ka01), deduced from the measured interaction cross section in C(33Mg,X) and H(33Mg,X) reactions at 900 MeV/nucleon with a (CH2)n target, and using Glauber model analysis with Fermi densities. The 33Mg secondary beam obtained from Be(48Ca,X) primary reaction. Experiment used fragment separator (FRS) at GSI.
E(level): Matter radius (rms)=3.19 fm 3 (2011Ka01), deduced from the measured interaction cross section in C(33Mg,X) and H(33Mg,X) reactions at 900 MeV/nucleon with a (CH2)n target, and using Glauber model analysis with Fermi densities. The 33Mg secondary beam obtained from Be(48Ca,X) primary reaction. Experiment used fragment separator (FRS) at GSI.
  3780   E(level): Decays to 32Mg by neutron emission.
  4000   E(level): Decays to 32Mg by neutron emission.

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Additional Gamma Comments:

E(level)E(gamma)Comments

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