QUEST FOR MAGICITY IN EXOTIC NUCLEI

2010 ◽  
Vol 25 (21n23) ◽  
pp. 1967-1971 ◽  
Author(s):  
HIRONORI IWASAKI
Keyword(s):  
Shell Model ◽  
Mass Spectroscopy ◽  
Transition Probabilities ◽  
Magic Number ◽  
Exotic Nuclei ◽  
Missing Mass ◽  
Model Calculations ◽  
Level Lifetime ◽  
Charge Independence ◽  
Neutron Rich Isotope

Low-lying excitation properties of exotic nuclei in the vicinity of the canonical magic number 8 have been investigated through the level lifetime measurement on the neutron-rich isotope 13 B with N = 8 and the missing-mass spectroscopy on the proton unbound nucleus 12 O with Z = 8. The observed trends of the transition probabilities and level schemes have been discussed in comparison with the advanced shell model calculations, which points to the universality as well as the charge independence of the shell quenching phenomena far from stability.

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 Shell Model calculations of nuclear structure in ʺIsland of inversionʺ N=20 region: 32-36Mg isotopes

2021 ◽  
Vol 67 (5 Sep-Oct) ◽  
Author(s):  
Firas Abed Ahmed
Keyword(s):  
Shell Model ◽  
Nuclear Structure ◽  
Transition Probabilities ◽  
Model Calculations ◽  
Island Of Inversion

The intruder configurations (1p-1h), (2p-2h) and (3p-3h) were studied in this work for the island of inversion within the SDPF-U Hamiltonian. The effect of the proton locations on the structure (energies and transition probabilities) for even-even and even-odd magnesium (N=20-24) isotopes is studied.

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.

Study of odd mass 115−125Sb isotopes with the projected shell model calculations

2017 ◽  
Vol 26 (06) ◽  
pp. 1750041 ◽  
Author(s):  
Dhanvir Singh ◽  
Arun Bharti ◽  
Amit Kumar ◽  
Suram Singh ◽  
G. H. Bhat ◽  
...  
Keyword(s):  
Shell Model ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Yrast Band ◽  
Spin States ◽  
Projected Shell Model ◽  
Model Calculations ◽  
High Spin States ◽  
Reduced Transition Probabilities ◽  
First Time

The projected shell model (PSM) with the deformed single-particle states, generated by the standard Nilsson potential, is applied to study the negative-parity high spin states of [Formula: see text] nuclei. The nuclear structure quantities like band structure and back-bending in moment of inertia have been calculated with PSM method and are compared with the available experimental data. In addition, the reduced transition probabilities, i.e., B[Formula: see text] and B[Formula: see text], are also obtained for the yrast band of these isotopes for the first time by using PSM wave function. A multi-quasiparticle structure has been predicted for [Formula: see text] isotopes by the present PSM calculations.

scholarly journals Realistic shell-model calculations and exotic nuclei

2014 ◽  
Vol 527 ◽  
pp. 012004 ◽  
Author(s):  
A Gargano ◽  
L Coraggio ◽  
A Covello ◽  
N Itaco
Keyword(s):  
Shell Model ◽  
Exotic Nuclei ◽  
Model Calculations

Realistic shell-model calculations and exotic nuclei around [sup 132]Sn

2008 ◽  
Author(s):  
A. Covello ◽  
L. Coraggio ◽  
A. Gargano ◽  
N. Itaco ◽  
Ismail Boztosun ◽  
...  
Keyword(s):  
Shell Model ◽  
Exotic Nuclei ◽  
Model Calculations

Large-scale shell model calculations for exotic nuclei

2002 ◽  
Vol 15 (1-2) ◽  
pp. 145-150 ◽  
Author(s):  
E. Caurier ◽  
F. Nowacki ◽  
A. Poves
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Exotic Nuclei ◽  
Model Calculations

Measurement of Reduced Electric Octupole Transition Probabilities, B(E3; 01??..31), for 118,120,122Sn

1989 ◽  
Vol 42 (1) ◽  
pp. 41 ◽  
Author(s):  
RH Spear ◽  
AM Baxter ◽  
SM Burnett ◽  
CL MiIler
Keyword(s):  
Shell Model ◽  
Transition Probabilities ◽  
Coulomb Excitation ◽  
Model Calculations ◽  
Effective Charges ◽  
Core Excitations ◽  
Good Agreement

Values of reduced electric octupole transition probabilities, B(E3; ot -31), for the nuclides llB,120,122Sn have been determined using Coulomb excitation with 12C projectiles. The results are in good agreement with shell-model calculations made without introducing effective charges but involving core excitations. Values for B(E2; ot -2t) are also presented.

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