scholarly journals Shell-model calculations for the energy levels of theN=50isotones withA=80–87

1989 ◽  
Vol 40 (1) ◽  
pp. 389-398 ◽  
Author(s):  
Xiangdong Ji ◽  
B. H. Wildenthal
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Model Calculations

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.

Shell model calculations on energy levels in the shell (II)

1964 ◽  
Vol 56 ◽  
pp. 548-568 ◽  
Author(s):  
P.W.M. Glaudemans ◽  
G. Wiechers ◽  
P.J. Brussaard
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
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.

scholarly journals Shell Model Calculations for 18,19,20O Isotopes by Using USDA and USDB Interactions

2018 ◽  
Vol 63 (3) ◽  
pp. 189 ◽  
Author(s):  
A. K. Hasan
Keyword(s):  
Shell Model ◽  
Empirical Data ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Model Space ◽  
Magic Nucleus ◽  
Model Calculations ◽  
O Isotopes ◽  
Good Agreement

The shell model (SM) is used to calculate the energy levels and transition probabilities B(E2) for 18,19,20 O isotopes. Two interactions (USDA and USDB) are used in the SDPN model space. We assume that all possible many-nucleon configurations are defined by the 0d5/2, 1s1/2, and d3/2 states that are higher than in 16 O doubly magic nucleus. The available empirical data are in a good agreement with theoretical energy levels predictions. Spins and parities were affirmed for new levels, and the transition probabilities B(E2; ↓) are predicted.

scholarly journals High-spin structures of 77,79,81,83As isotopes

2015 ◽  
Vol 30 (19) ◽  
pp. 1550093 ◽  
Author(s):  
Vikas Kumar ◽  
P. C. Srivastava ◽  
Irving O. Morales
Keyword(s):  
Shell Model ◽  
Magnetic Moments ◽  
Energy Levels ◽  
Model Space ◽  
Theoretical Development ◽  
Model Calculations ◽  
Effective Interactions ◽  
Spin Structures ◽  
Neutron Pair ◽  
Good Agreement

In this paper, we report comprehensive set of shell model calculations for arsenic isotopes. We performed shell model calculations with two recent effective interactions JUN45 and jj44b. The overall results for the energy levels and magnetic moments are in rather good agreement with the available experimental data. We have also reported competition of proton- and neutron-pair breakings analysis to identify which nucleon pairs are broken to obtain the total angular momentum of the calculated states. Further theoretical development is needed by enlarging model space by including [Formula: see text] and [Formula: see text] orbitals.

scholarly journals Study of the Electric Quadrupole Transitions in 50-51Mn Isotopes by Using F742pn and F7cdpn Interactions

2021 ◽  
Vol 22 (2) ◽  
pp. 1-5
Author(s):  
Ali Hasan ◽  
Fatema Obeed ◽  
Azahr Rahim
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Transition Probabilities ◽  
Energy Levels ◽  
Electric Quadrupole ◽  
Nuclear Shell Model ◽  
Radial Wave ◽  
Model Calculations ◽  
Ground Band ◽  
Nuclear Shell

The nuclear shell-model has been used to compute excitation levels of ground band and electric quadrupole transitions for 50-51Mn isotopes in f-shell. In the present study, f742pn and f7cdpn effective interactions have been carried out in full f-shell by using Oxbash Code. The radial wave functions of the single-particle matrix elements have been calculated in terms of the harmonic oscillator (Ho) and Skyrme20 potentials. The predicted theoretical results have been compared with the available experimental data; it has been seen that the predicted results are in agreement with the experimental data. From the current results of the calculations, many predictions of angular momentum and parities of experimental states have been made, and the energy spectra predictions of the ground band and B(E2; ↓) electric quadrupole transitions in 50-51Mn isotopes of the experimental data are not known yet. In the nuclear shell-model calculations framework, energy levels have been determined for 50-51Mn isotopes; new values of electric quadrupole transitions have been predicted in the studied results. This investigation increases the theoretical knowledge of all isotopes with respect to the energy levels and reduced transition probabilities.

Shell evolution for neutron-rich 46–54Ar isotopes in the full and truncated fp neutron model spaces

2021 ◽  
Author(s):  
Hussam A. Bahr ◽  
Ali A. Alzubadi
Keyword(s):  
Excitation Energy ◽  
Shell Model ◽  
Transition Probability ◽  
Energy Levels ◽  
Drip Line ◽  
Model Calculations ◽  
Effective Interactions ◽  
Argon Isotopes ◽  
Model Spaces ◽  
Text Model

The shell evolution of even–even drip line argon isotopes [Formula: see text] has been investigated via the shell model calculations using SDPF-U and SDPF-NR two-body effective interactions in two different shell model spaces [Formula: see text] and [Formula: see text]. In this work, the energy of first [Formula: see text], reduced transition probability [Formula: see text], excitation energy levels as well as how the proton shells evolve with [Formula: see text] have been studied. Excellent agreements were obtained for the first [Formula: see text] level along the investigated isotopes within [Formula: see text] and [Formula: see text] model spaces.

Shell model calculations on energy levels in the shell (I)

1964 ◽  
Vol 56 ◽  
pp. 529-547 ◽  
Author(s):  
P.W.M. Glaudemans ◽  
G. Wiechers ◽  
P.J. Brussaard
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Model Calculations

SIMPLE APPROACHES TO FULLERENES AND BUCKONIONS ELECTRONIC STRUCTURE: GUTZWILLER AND SHELL-MODEL CALCULATIONS

1996 ◽  
Vol 03 (01) ◽  
pp. 849-851
Author(s):  
R.J. TARENTO ◽  
P. JOYES ◽  
J. VAN DE WALLE
Keyword(s):  
Electronic Structure ◽  
Shell Model ◽  
Electron Affinity ◽  
Energy Levels ◽  
Quantum Mechanical ◽  
Electronic Correlation ◽  
Model Calculations ◽  
Hubbard Hamiltonian ◽  
Mechanical Methods ◽  
Model Approach

The electronic structure of fullerenes and buckonions have been investigated using quantum-mechanical methods: the Gutzwiller and shell-model techniques. In the first part, fullerenes have been modeled with the Hubbard Hamiltonian and the electronic correlation has been examined within the Gutzwiller framework. It has been derived various characteristic energies of fullerenes ( C 60 and C 240) in the free state (first and second ionization energies, electron affinity, and singlet and triplet energies). The second part deals with buckonions. Fullerenes and buckonions have been modeled with the spherical shell-model approach. The calculation has led to the electronic structure of fullerenes and of buckonions. So if we compare the energy levels of the buckonions with those of the fullerenes which build the buckonions, only the buckonions energy levels coming from the outer shell are changed by the coupling between shells.

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