ADOPTED LEVELS, GAMMAS for 39Si

Author: Jun Chen |  Citation: Nucl. Data Sheets 149, 1 (2018) |  Cutoff date: 1-Jan-2018 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=15.09×103 keV 18S(n)= 1.58×103 keV 17S(p)= 21.18×103 keV 40Q(α)= -15.74×103 keV 30
Reference: 2017WA10

References:
  A  9Be(40Si,39SiG)  B  9Be(40P,39SiG),(42S,39SiG)

General Comments:

First identification of 39Si by 1979We10.

1979We10: 39Si produced and identified in the fragmentation of 48Ca beam in 9Be(48Ca,X) reaction at 212 MeV/nucleon

1990AuZZ, 2003Au02: analysis with SPEG spectrometer of residuals in GANIL. Stable to neutron emission.

2004Gr20 (also 2003Gr22,2004Gr28): 39Si produced in fragmentation of 48Ca beam in 9Be(48Ca,X) E=60 MeV/nucleon; GANIL. Measured β, γ, T1/2 using Si and Ge detectors.

2000Sa21 (also 2001Sa72): measured mass; reaction: 181Ta(48Ca,X) at E=60 MeV/nucleon

1999YoZW: 9Be(48Ca,X) and 181Ta(48Ca,X) E=70 MeV/nucleon. Measured T1/2 and β-n. Tentative results

2006Kh08: Si(39Si,X) E=44.75 and 38.99 MeV/nucleon. Measured cross sections and average radius at GANIL facility

2011FuZZ: 9Be(48Ca,X) E=345 MeV/nucleon. Measured thick target fragmentation.

Mass measurement: 2007Ju03, 2000Sa21, 2001Sa72

Structure calculations: 2008Wi11 (quadrupole deformation parameter, potential surfaces for hypernuclei), 2009Co21 (half-life), 2012Ho19 (radii, deformation parameter)

Q-value: Q(β-n)=8870 150, S(2n)=7250 180, S(2p)=40470 710 (2017Wa10)










E(level)
(keV)		XREFJπ(level) T1/2(level)E(γ)
(keV)		I(γ)M(γ)Final Levels
     0AB (5/2-) 47.5 ms 20 
% β- = 100
% β-n = ?
% β-2n = ?
     
   0+XA  (3/2-)        
   171 5 AB (7/2-) 0.97 ns 7     171 5 
  100
[M1]
     0
(5/2-)
   399 13  B      397 14 
  100

     0
(5/2-)
   702 23  B      303 19 
  100

   399

   828 25  B      657 24 
  100

   171
(7/2-)
   879 4 ?A  (3/2+)      879 4 ?
  100

     0
(5/2-)
  1307 18  B      906 17 
  1143 27 
  100 23 
   48 20 


   399
   171

(7/2-)
  1722 28  B     1551 27 
  100

   171
(7/2-)

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

Jπ(level): From shell-model predictions by 2014St18 in (40Si,39Siγ)

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Additional Gamma Data:













E(level)
(keV)		Jπ(level)T1/2(level)E(γ)
(keV)		MultipolarityConversion
Coefficient		Additional Data
   171 (7/2-) 0.97 ns 7     171 5 [M1]0.00100B(M1)(W.u.)=0.0049 +14-11, α=0.00100 8

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0(5/2-) 47.5 ms 20 
% β- = 100
% β-n = ?
% β-2n = ?
σR=2.23 b 12 at 44.75 MeV/nucleon, 2.62 b 18 at 38.99 MeV/nucleon (2006Kh08).
E(level): σR=2.23 b 12 at 44.75 MeV/nucleon, 2.62 b 18 at 38.99 MeV/nucleon (2006Kh08).

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Additional Gamma Comments:

E(level)E(gamma)Comments
   171   171E(γ): weighted average of 172 5 in 9Be(40Si,39Siγ) and 163 12 in 9Be(40P,39Siγ),(42S,39Siγ)
  1307   906I(γ): From (40P,39Siγ),(42S,39Siγ)
  1143I(γ): From (40P,39Siγ),(42S,39Siγ)

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