ADOPTED LEVELS, GAMMAS for 33Si

Authors: Jun Chen and Balraj Singh |  Citation: Nucl. Data Sheets 199, 1 (2025) |  Cutoff date: 30-Sep-2024 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=5823.0 keV 13S(n)= 4508.0 keV 8S(p)= 16704 keV 7Q(α)= -12326.9 keV 8
Reference: 2021WA16

References:
  A  33Al β- decay (41.5 MS)  B  34Al β-n decay:MIXED
  C  2H(32Si,p)  D  9Be(34Si,33SiG)
  E  34S(13C,14O)  F  36S(11B,14N)
  G  36S(14C,17O)  H  160Gd(34S,X),(36S,X)
  I  198Pt(37Cl,xγ)  J  208Pb(36S,xγ)
  K  Coulomb Excitation 

General Comments:

Identification: 1971Ar32: 232Th(40Ar,X) E=290 MeV, measured fragment isotopic yield.

Mass measurement: 2009Kw02 (mass excess=-20514.30 70)

Later studies of production and decay studies of 33Si: 1972Go32, 1972Go09, 1973Go33, 1991Zh24, 1991Or01, 1995ReZZ, 2002Mo29

Other measurements:

2006Kh08: cross-section measurement in Si(33Si,X) E=30-65 MeV/nucleon, deduced reduced strong absorption radius= 1.0200 fm2 15. 33Si beam was obtained from fragmentation of a 48Ca beam with 181Ta target at GANIL facility.

1999Ai02: cross-section measurement in Si(33Si,X) E=38-80 MeV/nucleon at NSCL facility. Deduced strong absorption radius

Structure calculations:

2017Sa48: calculated magnetic-dipole and electric-quadrupole moments for ground state

2017Ta18: calculated levels, J, π, configurations.

2013Li39: calculated β-decay half-life, β-delayed neutron emission probabilities.

Q-value: S(2n)=13707.9 7, S(2p)=31970 3 (2021Wa16)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0.0ABCDEFGHIJK (3/2)+ 6.11 s 21 
% β- = 100
     
  1009.92 40 ABCDEFGH JK 1/2+     1009.9 4 
  100

     0.0
(3/2)+
  1434.9 5  BCDE  HIJ  7/2- 10.2 ns 3    1434.9 5 
  100
M2
     0.0
(3/2)+
  1980.9 11   CDE    J  (3/2)-      971 1 
  100

  1009.92
1/2+
  3159.0 16   CDE    J  (9/2-)     1724 2 
  100

  1434.9
7/2-
  3580 20   C         1/2-,3/2-        
  4090.0 16    DE    J  (11/2-)      931 1 
  2655 2 
 
  100


  3159.0
  1434.9
(9/2-)
7/2-
  4268.3 40    D      K (5/2+)     4268 4 
  100

     0.0
(3/2)+
  4346.3 40 A  DEF    K (5/2+)     4346 4 
  100

     0.0
(3/2)+
  4520 40   C         (1/2-,3/2,5/2+)        
  4932.1 26    D     J  (11/2-)     1773 2 
  100

  3159.0
(9/2-)
  5443 6   CDE       (5/2+)     5442 6 
  100

     0.0
(3/2)+

E(level): From a least-squares fit to γ-ray energies

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Additional Gamma Data:











E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityAdditional Data
  1434.9 7/2- 10.2 ns 3    1434.9 5 M2B(M2)(W.u.)=0.0486 15

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0(3/2)+ 6.11 s 21 
% β- = 100
μ=1.21 3 (1992Ma52,2019StZV)
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).
  1009.921/2+   B(E2)=0.00165 32 (2000Pr09)
XREF: B(?)E(1040?)F(1060)γ(1040).
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).
  1434.97/2- 10.2 ns 3  XREF: E(1470).
  1980.9(3/2)-   XREF: E(2000).
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).
  3159.0(9/2-)   XREF: C(3190)E(3190).
  4090.0(11/2-)   XREF: E(4130).
  4268.3(5/2+)   B(E2)|^=0.0069 13 for a level at 4300 in Coulomb excitation (2000Pr09).
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).
  4346.3(5/2+)   XREF: E(4320)F(4320).
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).
  4932.1(11/2-)   XREF: J(4931?).
  5443(5/2+)   XREF: C(5430)E(5480).
Jπ(level): From L(n)-transfers deduced from measured momentum distribution in 9Be(34Si,33Si) as given under comments and shell-model predictions for spin (2020Jo06).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  1009.92  1009.9E(γ): weighted average of 1010.2 5 from 33Al β- decay, 1009.7 4 from 34Al β-n decay, 1010 1 from (34Si,33Siγ), and 1010 1 from (36S,Xγ). Other: 1010 7 from Coulomb excitation
  1434.9  1434.9E(γ): from 34Al β-n decay. Other: 1435 2 from (36S,Xγ)
M(γ): from analysis of in-plane to out-of-plane γ asymmetry in 198Pt(37Cl,Xγ) (2002AsZY).
  1980.9   971E(γ): from (34Si,33Siγ) and (36S,Xγ)
  3159.0  1724E(γ): from (34Si,33Siγ) and (36S,Xγ)
  4090.0   931E(γ): from (34Si,33Siγ) only
  2655E(γ): from (36S,Xγ). Other: 2655 3 from (34Si,33Siγ)
  4268.3  4268E(γ): from (34Si,33Siγ) only
  4346.3  4346E(γ): weighted average of 4341 11 from 33Al β- decay and 4347 4 from (34Si,33Siγ)
  4932.1  1773E(γ): from (34Si,33Siγ). Other: 1772 2 from (36S,Xγ)
  5443  5442E(γ): from (34Si,33Siγ) only

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