ADOPTED LEVELS for 44Si

Authors: Jun Chen, Balraj Singh and John A. Cameron |  Citation: Nucl. Data Sheets 112, 2357 (2011) |  Cutoff date: 31-Jul-2011 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=1.81×104 keV SYS(n)= 2.7×103 keV SYS(p)= 2.67×104 keV SYQ(α)= -2.25×104 keV SY
Reference: 2012WA38

General Comments:

First identification of 44Si nuclide by 2007Ta15.

2007Ta15: W(48Ca,Xγ) E=142 MeV/nucleon beam from the National Superconducting Cyclotron Laboratory (NSCL). The fragments were separated with the A1900 fragment separator. Isotopic identification by multiple ΔE signals, magnetic rigidity, total energy and time-of-flight analysis. Detectors: plastic scintillators, parallel-plate avalanche counters (PPACs) and silicon PIN diodes. The Be target was also used with 48Ca beam

α total of three events were assigned to 44Si with natural tungsten target and no events due to 44Si were observed with a Be target.

Structure calculations (levels, B(E2), etc.): 2009No01, 1997Re04

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

Q-value: Estimated uncertainties (2011AuZZ): 1130 in Q(β-) and S(n), 1210 in S(p), 950 in Q(α)

Q-value: Q(β-n)=15760 880, S(2n)=4190 950 (syst,2011AuZZ). S(2p)=50930 (calculated,1997Mo25)

Q-value: Values from syst in 2003Au03: Q(β-)=20740 1060, S(n)=1920 1060, Q(α)=-19820 1210, Q(β-n)=19010 1260, S(2n)=1730 950





E(level)
(keV)
Jπ(level) T1/2(level)
  0 0+ > 360 ns
% β- = 100
% β-n = ?

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
  00+ > 360 ns
% β- = 100
% β-n = ?
Production cross section=7×10-10 mb 5.

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