ADOPTED LEVELS, GAMMAS for 34Si

Authors: Ninel Nica, Balraj Singh |  Citation: Nucl. Data Sheets 113, 1563 (2012) |  Cutoff date: 28-May-2012 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=4592 keV 15S(n)= 7514 keV 15S(p)= 1.878×104 keV 8Q(α)= -13498 keV 15
Reference: 2012WA38

References:
  A  34Al β- decay (56.3 MS)  B  35Al β-n decay (37.7 MS)
  C  2H(34Si,34Si’γ)  D  7Li(34P,7BeG)
  E  9Be(35Si,34SIXG)  F  SI(34Si,34Si’γ)
  G  36S(11B,13N)  H  36S(14C,16O)
  I  160Gd(36S,xγ)  J  Coulomb Excitation

General Comments:

Identifications and production of 34Si: 1971Ar32 in 232Th(40Ar,X) at E=290 MeV. Later study: 1977Na05

2008Wi09: 208Pb(36S,X) E=230 MeV. Measured Eγ using GAMMASPHERE array and CHICO arrays at ANL. The known γ rays of 125, 591, 930, 3326 and 4255 keV were observed in this work. Main study was for 35P structure

Measurement of strong absorption radius: 2006Kh08, 1999Ai02

Structure calculations: 2009Bo16 (negative-parity intruders, shell model); 2009Gr04 (binding energy, charge radius, neutron density, shell model); 2007Co22 (binding energy, single proton transfer reactions); 2002St30 (shell closure effects); 2002Ut02 (levels, spins, shell model); 2001Ca49 (levels, spins, B(E2), shell model); 2000Pe27 (shell closure features); 2000Ro08 (2+ levels, B(E2)); 1994Po05 (intruder levels);

1999Ai02: measurement of strong absorption radius; Si(34P,X) reaction at 38-80 MeV/nucleon, NSCL facility. The 34P beam was obtained from fragmentation of 55Mn beam with 9Be target at 50-90 MeV/nucleon.

1986Sm05, 1985Wo07: 64Ni(36S,34Si) E=198 MeV. Measured σ, deduced mass excess

Nuclear structure theoretical calculations:

1992Fu07: pf-shell occupation numbers, vanishing of n=20 shell gap

1991He06: intruder states

1988Wa04: levels, decay scheme parameters, shell model

Levels: α 2133, (0+) level proposed in 2001Nu01 but not confirmed by 2002Mi44 and 2003Iw02 is omitted here. The 1193 transition feeding from 3326 level to a 2133 level is placed from a 4519 level to 3326 level according to 2003Iw02

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

Q-value: S(2n)=12022 14, S(2p)=33623 23 (2011AuZZ)

Q-value: Values in 2003Au03: Q(β-)=4601 15, S(n)=7535 21, S(p)=18720 70, Q(α)=-13471 16, S(2n)=12018 14, S(2p)=33580 23










E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)M(γ)Final Levels
     0.0ABCDEFGHIJ 0+ 2.77 s 20 
% β- = 100
     
  3327.14 20 ABCDEF  IJ 2+ 82 fs 32    3326.96 20 
  100
[E2]
     0.0
0+
  3590 25        H          
  4256.1 4 ABCDEF  I  (3-) < 210 ns    929.0 3 
  4257 3 
  100 10 
   22 3 

[E3]
  3327.14
     0.0
2+
0+
  4380.2 4 ABCDE   I  (3-)      124.2 3 
  1052.8 4 
  100 8 
    7.5 12 
[M1+E2]

  4256.1
  3327.14
(3-)
2+
  4520.2 11 ?A CDE          1193.34 20 
  100

  3327.14
2+
  4971.1 5 A CDE      (3-,4-,5-)      590.9 3 
  100

  4380.2
(3-)
  5042.2 11 ?A CDE          1715.4 8 
  100

  3327.14
2+
  5330.4 10    D  G    2+     2000?
  5330
   59 9 
  100


  3327.14
     0.0
2+
0+
  6023.3 11 ?A CDE          2696.4 12 
  100

  3327.14
2+

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Additional Gamma Data:













E(level)
(keV)
Jπ(level)T1/2(level)E(γ)
(keV)
MultipolarityConversion
Coefficient
Additional Data
  3327.14 2+ 82 fs 32    3326.96 20 [E2]B(E2)(W.u.)=2.6 10
  4380.2 (3-)      124.2 3 [M1+E2]0.025α=0.025 23, α(K)=0.023 22, α(L)=0.0017 16

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.00+ 2.77 s 20 
% β- = 100
Measured r20=1.23 fm2 4 (2006Kh08) in Si(34Si,X) reaction at 51.5 MeV/nucleon and 58.9 MeV/nucleon. Integral cross sections were also measured.
E(level): Measured r20=1.23 fm2 4 (2006Kh08) in Si(34Si,X) reaction at 51.5 MeV/nucleon and 58.9 MeV/nucleon. Integral cross sections were also measured.
  4380.2(3-)   XREF: E(?).
  4971.1(3-,4-,5-)   XREF: E(?).
  5330.42+   Deduced B(>)=0.74 18(stat) +00-14(syst) (7Li(34P,7Beγ)).

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Additional Gamma Comments:

E(level)E(gamma)Comments
  4256.1  4257I(γ): other: Iγ(4257)/Iγ(929)=0.53 4 in 2H(34Si,34Si’γ) is too high by a factor of ≈2

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