Hybrid schemes for the calculation of low-energy levels of shell model Hamiltonians

2006 ◽  
Vol 32 (3) ◽  
pp. 321-331 ◽  
Author(s):  
G Puddu
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Low Energy ◽  
Hybrid Schemes ◽  
Model Hamiltonians

scholarly journals Cross-Shell Excitation in F and Ne Isotopes around N = 20

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2167
Author(s):  
Menglan Liu ◽  
Cenxi Yuan
Keyword(s):  
Shell Model ◽  
Configuration Interaction ◽  
Energy Levels ◽  
Low Energy ◽  
Shell Structures ◽  
Effective Interactions ◽  
The Cross

Within the framework of the configuration–interaction shell model, the present work applies three effective interactions to investigate the effects of the cross-shell excitation on F and Ne isotopes around N = 20, which are significantly proton–neutron asymmetric, and have different properties compared with the proton–neutron symmetric nuclei. It is shown that cross-shell excitation is necessary in order to reproduce separation energies, neutron drip lines, and low-energy levels of these isotopes. Furthermore, the cross-shell excitation of (0–5)ħω is suggested to be important in the description of 29F and 30Ne. However, the three interactions are insufficient in describing the bound structure of 29,31Ne, and provide inconsistent shell structures and evolutions in the target nuclei. Their cross-shell interactions are suggested to be improved.

Shell-model study ofS39(β−)39Cl and the energy levels ofCl39

1989 ◽  
Vol 40 (6) ◽  
pp. 2823-2833 ◽  
Author(s):  
E. K. Warburton ◽  
J. A. Becker
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Model Study

Low-energy levels and gamma transitions inCo58

1975 ◽  
Vol 11 (3) ◽  
pp. 1042-1047 ◽  
Author(s):  
B. J. Brunner ◽  
R. G. Arns ◽  
S. E. Caldwell ◽  
C. M. Rozsa ◽  
J. W. Smith ◽  
...  
Keyword(s):  
Energy Levels ◽  
Low Energy ◽  
Gamma Transitions

scholarly journals Low-energy levels calculation for 193Ir

2006 ◽  
Vol 36 (4b) ◽  
pp. 1354-1356
Author(s):  
Guilherme Soares Zahn ◽  
Cibele Bugno Zamboni ◽  
Frederico Antonio Genezini ◽  
Joel Mesa-Hormaza ◽  
Manoel Tiago Freitas da Cruz
Keyword(s):  
Energy Levels ◽  
Low Energy

scholarly journals Large Scale Shell Model Calculations of the Negative-Parity States Structure in 24Mg Nucleus

2021 ◽  
Vol 66 (4) ◽  
pp. 293
Author(s):  
A.A. Al-Sammarraie ◽  
F.A. Ahmed ◽  
A.A. Okhunov
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Transition Probabilities ◽  
Transition Probability ◽  
Energy Levels ◽  
Form Factors ◽  
Model Space ◽  
Negative Parity ◽  
Matrix Elements ◽  
Model Calculations

The negative-parity states of 24Mg nucleus are investigated within the shell model. We are based on the calculations of energy levels, total squared form factors, and transition probability using the p-sd-pf (PSDPF) Hamiltonian in a large model space (0 + 1) hW. The comparison between the experimental and theoretical states showed a good agreement within a truncated model space. The PSDPF-based calculations successfully reproduced the data on the total squared form factors and transition probabilities of the negative-parity states in 24Mg nucleus. These quantities depend on the one-body density matrix elements that are obtained from the PSDPF Hamiltonian. The wave functions of radial one-particle matrix elements calculated with the harmonic-oscillator potential are suitable to predict experimental data by changing the center-of-mass corrections.

scholarly journals Calculations with Reaction Matrices in the p?f Shell

1972 ◽  
Vol 25 (6) ◽  
pp. 651
Author(s):  
HN Comins ◽  
RGL Hewitt
Keyword(s):  
Binding Energy ◽  
Shell Model ◽  
Energy Levels ◽  
Model Reaction ◽  
Pauli Operator ◽  
Reaction Matrix

Elements of the shell-model reaction matrix have been calculated for the p-f shell with an exact treatment of the Pauli operator. These elements have been used in straightforward calculations of the energy levels of 42Ca and 42Sc and the binding energy of 40Ca.

scholarly journals p-Wave Strength in the Low-energy 7Li(p,?0)8Be Cross Section

1995 ◽  
Vol 48 (5) ◽  
pp. 813 ◽  
Author(s):  
FC Barker
Keyword(s):  
Angular Distribution ◽  
Shell Model ◽  
Cross Section ◽  
Low Energy ◽  
P Wave ◽  
Model Calculations ◽  
Energy Data

Recent fits to low-energy 7Li(p, "Yo)8Be angular distribution and analysing power data suggested a large p-wave strength. It is shown that acceptable fits to the data can be obtained by attributing the p-wave Ml contributions to the tails of the 17 �64 and 18 �15 MeV 1+ levels of 8Be, with p-wave strengths much less than those obtained previously, but only if some of the spectroscopic amplitudes have signs opposite to those suggested by shell model calculations and/or a fit to higher-energy data.

scholarly journals Shell-Model Hamiltonians from Chiral Forces

2018 ◽  
Author(s):  
Sota Yoshida ◽  
Michio Kohno ◽  
Takashi Abe ◽  
Takaharu Otsuka ◽  
Naofumi Tsunoda ◽  
...  
Keyword(s):  
Shell Model ◽  
Model Hamiltonians

scholarly journals Performance Improvement of Ultra Wideband Multiple Access Modulation System using a new Optimal Pulse Shape

2017 ◽  
Vol 6 (1) ◽  
pp. 20
Author(s):  
V. Goyal ◽  
B. S. Dhaliwal
Keyword(s):  
Performance Improvement ◽  
Pulse Shape ◽  
Multiple Access ◽  
Energy Levels ◽  
Rake Receiver ◽  
Correct Choice ◽  
Low Energy ◽  
Ultra Wideband ◽  
High Data ◽  
Very High

Ultra-wideband (UWB) uses very low energy levels to transfer data at very high data rate and bandwidth. An optimal and correct choice of transmission pulse shape is an important criterion in this technology. In this paper, we will present an approach for the generation of an optimal pulse shape with the optimal generation of pulse shape values that can provide effective results when transmitted using multiple access modulation technique over a multipath channel and received by a RAKE type receiver. The bit error analysis of constructed model is also given using Ideal Rake, selective RAKE, and partial RAKE receiver configurations.

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