THE ANTISYMMETRIZED WEAK COUPLING SCHEME IN SHELL MODEL CALCULATIONS

1971 ◽  
Vol 32 (C6) ◽  
pp. C6-51-C6-55
Author(s):  
S. K. M. WONG ◽  
A. P. ZUKER
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Scheme ◽  
Model Calculations

Low-lying Negative-parity Levels of 17N and 18N

1984 ◽  
Vol 37 (1) ◽  
pp. 17 ◽  
Author(s):  
FC Barker
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Negative Parity ◽  
Positive Parity ◽  
Model Calculations

On the basis of a weak-coupling model, adjustments are made to the interactions used in the full shell model calculations of Millener in order to fit the experimental energies of the low-lying negativeparity levels of 16N and of the low-lying positive-parity levels of 180 and 190 . The predicted energies of the low-lying negative-parity levels of 17N then agree better with experiment, while those for 18N lead to suggested spin assignments for the observed levels.

scholarly journals AbinitioNo-core Shell Model Calculations in a SU(3)-based Coupling Scheme

2012 ◽  
Vol 387 ◽  
pp. 012016
Author(s):  
T Dytrych ◽  
K D Launey ◽  
J P Draayer ◽  
D Langr
Keyword(s):  
Shell Model ◽  
Coupling Scheme ◽  
Core Shell ◽  
Model Calculations

A generalized LS-coupling scheme for shell-model calculations and related truncation schemes

1989 ◽  
Vol 492 (2) ◽  
pp. 215-236
Author(s):  
Ji Xiandong ◽  
B.H. Wildenthal ◽  
M. Vallières
Keyword(s):  
Shell Model ◽  
Coupling Scheme ◽  
Model Calculations

A simple coupling scheme for exact shell model calculations

1971 ◽  
Vol 36 (5) ◽  
pp. 437-441 ◽  
Author(s):  
S.K.M. Wong ◽  
A.P. Zuker
Keyword(s):  
Shell Model ◽  
Coupling Scheme ◽  
Model Calculations

Resonances in the 15N(α,γ)19F Reaction Between Eα = 1.68 and 2.72 MeV

1972 ◽  
Vol 50 (20) ◽  
pp. 2428-2443 ◽  
Author(s):  
D. W. O. Rogers ◽  
R. P. Beukens ◽  
W. T. Diamond
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Branching Ratios ◽  
Negative Parity ◽  
Angular Distributions ◽  
Model Calculations ◽  
Spin Parity ◽  
The Third

Using the 15N(α,γ)19F reaction, the properties of 6 levels between 5.3 and 6.2 MeV in 19F have been studied. In conjunction with previously reported restrictions on spins for these levels, measurements of branching ratios, radiative widths, and angular distributions have been used to make the following spin–parity assignments; 5618 keV, 3/2−; 5938 keV, 1/2+; 6070 keV, 7/2+; 6088 keV, 3/2−; 6160 keV, 7/2−. The properties of these levels and that at 5336 keV have been compared in detail to the various shell model calculations done for 19F. The properties of the third Jπ = 7/2+ level at 6.07 MeV can be used to clear up some of the confusion caused by the first two Jπ = 7/2+ levels in 19F and the properties of the Jπ = 3/2− levels confirm the fact that the weak coupling model does not explain the negative parity states outside the K = 1/2− band.

scholarly journals E2 collectivity in shell-model calculations for odd-mass nuclei near 132Sn

2020 ◽  
Vol 232 ◽  
pp. 04007
Author(s):  
T. J. Gray ◽  
A. E. Stuchbery ◽  
L. A. Fuderer ◽  
J. M. Allmond
Keyword(s):  
Experimental Study ◽  
Shell Model ◽  
Early Onset ◽  
Coupling Scheme ◽  
Model Calculations ◽  
Show Evidence

Shell-model calculations for 127,129In and 129,131Sb are presented, and interpreted in the context of the particle-core coupling scheme, wherein proton g9/2 holes or g7/2 particles are added to semimagic 128,130Sn cores. These results indicate that the particle-core coupling scheme is appropriate for the Sb isotopes, whilst less so for the In isotopes. B(E2) excitation strengths are also calculated, and show evidence of enhanced collectivity in both Sb isotopes, especially 131Sb. This observation suggests that 131Sb would be an excellent case for an experimental study seeking to investigate the early onset of collectivity near 132Sn.

Shell model calculations for odd-mass A = 51–55 nuclei using a weak-coupling basis

1976 ◽  
Vol 54 (16) ◽  
pp. 1683-1691 ◽  
Author(s):  
H. G. Benson ◽  
I. P. Johnstone
Keyword(s):  
Shell Model ◽  
Weak Coupling ◽  
Coupling Model ◽  
Excitation Energies ◽  
Model Calculations ◽  
Neutron Hole

The excitation energies of states belonging to various n1-particle. n2-hole configurations relative to a 56,Ni core are calculated, using, when necessary, truncation based on a weak-coupling model. The calculations account for the occurrence of low-lying five-hole states in 53Mn, reproduce the bands of neutron–hole states observed in 53Cr and 53Fe, and predict the existence of low-lying four-hole states in 55Co.

Grid Lifetime Measurements and Shell Model Calculations In 59Ni

1991 ◽  
Author(s):  
S. Ulbig ◽  
K. P. Lieb ◽  
H. G. Börner ◽  
S. J. Robinson ◽  
J. G. L. Booten
Keyword(s):  
Shell Model ◽  
Lifetime Measurements ◽  
Model Calculations
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