A Measurement of the Branching Ratio for the Gamma Transitions from the 4·235 MeV Level of 24Mg

1973 ◽  
Vol 26 (2) ◽  
pp. 257 ◽  
Author(s):  
D Branford
Keyword(s):  
Shell Model ◽  
Branching Ratio ◽  
Rotational Model ◽  
Model Calculations ◽  
Gamma Transitions ◽  
Bombarding Energy

The branching ratio for the y-transitions from the 4�235 MeV level of 24Mg has been measured following a study of the 23Na(p, y) resonances at 1021 and 1416 keV bombarding energy. The result, which is considerably more accurate than those reported previously, is compared with the predictions of the rotational model and shell model calculations.

scholarly journals Energy Spectrum of 51V by the Intermediate Coupling Approach

1974 ◽  
Vol 27 (2) ◽  
pp. 289 ◽  
Author(s):  
Woon-Hyuk Chung
Keyword(s):  
Energy Spectrum ◽  
Shell Model ◽  
Strong Coupling ◽  
Energy Levels ◽  
Coupling Model ◽  
Intermediate Coupling ◽  
Rotational Model ◽  
Model Calculations ◽  
Coupling Approach ◽  
Intermediate Coupling Model

In recent years the nucleus 51 Y has been extensively studied, both experimentally by Horoshko et al. (1970), using the 48Ti(oc, py)51y reaction, and theoretically in terms of shell model calculations by many authors (McCullen et al. 1964; Horoshko et al. 1970; Lips and McEllistrem 1970). Mixed configuration shell model calculations by Lips and McEllistrem, in particular, have successfully reproduced the low-lying energy levels of5ly. However, strong coupling rotational model calculations by Malik and Scholz (1966) did not give satisfactory results. In the present work, the intermediate coupling unified model (Bohr and Mottelson 1953; Choudhury 1954) is applied to Sly. The purpose of this work is to show that the intermediate coupling model can successfully predict the low-lying energy levels of Sly.

Transition Strengths of Analogue States in A = 18 Nuclei

1972 ◽  
Vol 50 (16) ◽  
pp. 1791-1794 ◽  
Author(s):  
C. Rolfs
Keyword(s):  
Shell Model ◽  
Branching Ratio ◽  
Model Calculations ◽  
The Mean ◽  
Γ Ray

A search for the 3061 (2+, T = 1) → 1041 (0+, T = 1) keV γ-ray branch in 18F has been performed with the use of the capture reactions 14N(α,γ)18F at Ea = 1526 keV and 17O(p,γ)18F at EP = 741 keV. The observed branching ratio is 0.11 ± 0.03%. The mean life of the 3061 keV state was found to be < 1.5 fs. This E2 branch in 18F is compared with the analogue transitions in 18O and 18Ne as well as with shell model calculations.

scholarly journals Study of the Q.Q interaction

2018 ◽  
Vol 27 (07) ◽  
pp. 1850056
Author(s):  
Arun Kingan ◽  
Xiaofei Yu ◽  
Larry Zamick
Keyword(s):  
Shell Model ◽  
Quadrupole Interaction ◽  
Single Particle ◽  
Ground State ◽  
Ground State Band ◽  
Rotational Model ◽  
Model Calculations ◽  
State Band

We perform shell model calculations using a quadrupole–quadrupole interaction (Q.Q). We show results in single j shell spaces and the full S-D shell. We show that one gets useful results with Q.Q in both spaces. We emphasize the importance of the choice of single particle energies in order to obtain the results of Elliott using a Q.Q interaction without the momentum terms. We show a [Formula: see text] spectrum for a ground state band but with [Formula: see text]’s different from the rotational model. We also show results such as [Formula: see text] and [Formula: see text] excited “spin bands”. (The latter can also be expressed as a [Formula: see text] band). We find spectra starting with [Formula: see text] which have both even [Formula: see text] and odd [Formula: see text] members.

scholarly journals Angular Correlations in 19O

1976 ◽  
Vol 29 (5) ◽  
pp. 355
Author(s):  
JR Southon ◽  
AR Poletti ◽  
DJ Beale
Keyword(s):  
Shell Model ◽  
Rotational Model ◽  
Model Calculations ◽  
Thin Target ◽  
Angular Correlations ◽  
Mixing Ratios

p-y correlation measurements have been carried out on 190 levels populated by the 1BO(d, p) reaction. A cryogenically cooled thin target of lBO-enriched ice was used. Our data allow the following spin values: J(2'37) = 5/2,7/2 or 9/2; J(2'78) = 3/2+ or 7/2+; J(3'15) = 3/2 or 5/2. Previous spin assignments of 3/2 and 9/2 for the 2� 37 and 2� 78 MeY levels respectively are rigorously rejected. Mixing ratios measured for the 2,37-+0,2,78->0 and 3'15-+0'096MeY transitions agree with previous determinations. The results are discussed in terms of recent shell model and rotational model calculations on 190.

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

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 Study of nuclei around Z = 28 by large-scale shell model calculations

2013 ◽  
Vol 445 ◽  
pp. 012028 ◽  
Author(s):  
Y Tsunoda ◽  
T Otsuka ◽  
N Shimizu ◽  
M Honma ◽  
Y Utsuno
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Model Calculations
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