ADOPTED LEVELS, GAMMAS for 38Si

Author: Jun Chen |  Citation: Nucl. Data Sheets 152, 1 (2018) |  Cutoff date: 30-Sep-2017 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1.045×104 keV 13S(n)= 5.67×103 keV 15S(p)= 2.127×104 keV 21Q(α)= -1.492×104 keV 11
Reference: 2017WA10

References:
  A  38Al β- decay  B  1H(38Si,38Si’γ)
  C  C(40S,38SI2PG)  D  Coulomb Excitation

General Comments:

38Si first produced and identified by 1979We10 in 9Be(48Ca,X) reaction at 212 MeV/nucleon

Other measurements:

2017Tr02: 9Be(48Ca,X) E=140 MeV/nucleon at NSCL. Measured T1/2, %β-n.

1999YoZW: 181Ta(48Ca,X) E=70 MeV/nucleon. Measured T1/2, %β-n (tentative results)

1991Zh24: Th(p,X) E(p)=800 MeV followed. Measured fragment mass, charge state ratio, velocity

2006Kh08: Si(38Si,X) E=30-65 MeV/nucleon at GANIL. Measured σ. Deduced reduced strong absorption radius=1.20 fm2 3.

Mass measurements: 2007Ju03, 2001Sa72 (also 2000Sa21), 1991Zh24

Consult NSR database for about 20 theory references.

Q-value: S(2n)=7880 130, S(2p)=39130 700, Q(β-n)=6750 110 (2017Wa10)









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)Final Levels
     0ABCD 0+ 63 ms 8 
% β- = 100
% β-n = 25 10
    
  1074 2 ABCD 2+ 10 ps +6-3    1074 2 
  100
     0
0+
  2233 3 A C  (4+)     1159 2 
  100
  1074
2+
  2355 29 ?  C  (4+)     1284 26 ?
  100
  1074
2+
  3285 3 A    (3)     2211 2 
  100
  1074
2+
  3656?A    (1-)     3656?
  100
     0
0+
  3703 3 A    (4+)      418 2 
  1470 2 
   76 12 
  100 12 
  3285
  2233
(3)
(4+)

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

Jπ(level): From shell-model predictions in 38Al β- decay (2015St14), unless otherwise noted.

Back to top

Back to top

Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     00+ 63 ms 8 
% β- = 100
% β-n = 25 10
Calculated %β-n=36 (2003Mo09), %β-n=9.8 (2016Ma12).
  10742+ 10 ps +6-3  B(E2)=0.019 7 (1998Ib01), β2=0.35 +2-3 (2007Ca35)
β2 from 1H(38Si,38Si’γ) (2007Ca35), deduced for vibrational model. Others: 0.34 +2-3 (prolate rotational model), 0.38 3 (oblate rotational model). Sign of β2 is not given in 2007Ca35.
E(level): β2 from 1H(38Si,38Si’γ) (2007Ca35), deduced for vibrational model. Others: 0.34 +2-3 (prolate rotational model), 0.38 3 (oblate rotational model). Sign of β2 is not given in 2007Ca35.

Back to top

Additional Gamma Comments:

E(level)E(gamma)Comments
  1074  1074E(γ): others: 1084 20 in Coulomb excitation, 1071 12 in (40S,38Si2pγ)
  2233  1159E(γ): other: 1168 22 in (40S,38Si2pγ)
  2355  1284E(γ): from (40S,38Si2pγ) only, very weak

Back to top