scholarly journals Lifetimes of core-excited states in semi-magic $$^{95}\mathrm {Rh}$$

2020 ◽  
Vol 56 (11) ◽  
Author(s):  
A. Ertoprak ◽  
C. Qi ◽  
B. Cederwall ◽  
M. Doncel ◽  
U. Jakobsson ◽  
...  
Keyword(s):  
Large Scale ◽  
Negative Parity ◽  
Accelerator Facility ◽  
Model Calculations ◽  
High Spin States ◽  
Line Shapes ◽  
Slowing Down ◽  
Evaporation Reaction ◽  
Doppler Shift Attenuation ◽  
Metallic Target

AbstractLifetimes of negative-parity states have been determined in the neutron deficient semi-magic (N = 50) nucleus $$^{95}\mathrm {Rh}$$ 95 Rh . The fusion-evaporation reaction $$^{58}Ni(^{40}Ca, 3p)$$ 58 N i ( 40 C a , 3 p ) was used to populate high-spin states in $$^{95}\mathrm {Rh}$$ 95 Rh at the Grand Accélérateur National d’Ions Lourds (GANIL) accelerator facility. The results were obtained using the Doppler Shift Attenuation Method (DSAM) based on the Doppler broadened line shapes produced during the slowing down process of the residual nuclei in a thick $$6\;\mathrm {mg/cm}^2$$ 6 mg / cm 2 metallic target. B(M1) and B(E2) reduced transition strengths are compared with predictions from large-scale shell-model calculations.

scholarly journals Decay properties of high spin states in Mn

2019 ◽  
Vol 14 ◽  
pp. 89
Author(s):  
M. Axiotis ◽  
A. Gadea ◽  
N. Märginean ◽  
S. M. Lenzi ◽  
D. R. Napoli ◽  
...  
Keyword(s):  
High Spin ◽  
Large Scale ◽  
Spin States ◽  
Model Calculations ◽  
Electromagnetic Decay ◽  
High Spin States ◽  
Decay Properties ◽  
Doppler Shift Attenuation ◽  
The Mean ◽  
Coincidence Measurements

The electromagnetic decay properties of high spin states in 52Mn have been studied through various experiments with the GASP and EUROBALL arrays plus the ISIS charged-particle detector, the Neutron-Wall and the Recoil Filter Detector. From 7-7-particles coincidence measurements, spins and parities of these states have been determined and using the Doppler-shift attenuation method the mean life of some of these states have been determined. These results are compared with large scale shell-model calculations in the full fp shell.

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.

SHAPE EVOLUTION OF HIGHLY DEFORMED 75Kr AND PROJECTED SHELL MODEL DESCRIPTION

2010 ◽  
Vol 19 (08n09) ◽  
pp. 1754-1762 ◽  
Author(s):  
YING-CHUN YANG ◽  
YANG SUN ◽  
T. TRIVEDI ◽  
R. PALIT ◽  
J. A. SHEIKH
Keyword(s):  
Shell Model ◽  
Negative Parity ◽  
Model Description ◽  
Shape Evolution ◽  
Quadrupole Moments ◽  
Projected Shell Model ◽  
Model Calculations ◽  
High Spin States ◽  
Parity Band ◽  
Insight Into

A study of recently-measured high spin states of 75 Kr is carried out by using the Projected Shell Model. Calculations are performed up to spin I = 33/2 for the positive parity band and I = 27/2 for the negative parity band. Irregularities found in moment of inertia and in the deduced transition quadrupole moments Q t of the two bands are discussed in terms of the alignment of g 9/2 protons. Our study provides an insight into the shape evolution of the well-deformed nucleus 75 kr .

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 Large–scale shell model calculations for 140Xe

2018 ◽  
Vol 194 ◽  
pp. 01004
Author(s):  
Sevdalina Dimitrova ◽  
Nicola Lo Iudice
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Nucleon Nucleon ◽  
Excitation Energies ◽  
Model Calculations ◽  
Nucleon Potential ◽  
High Spin States ◽  
Angular Momenta ◽  
Matrix Diagonalization ◽  
Nucleon Nucleon Interaction

This paper presents the results of a large-scale shell model calculations of the yrast spectrum of 140Xe. We extend the previous calculations confined to low-lying angular momenta to high-spin states apply- ing the same importance sampling iterative matrix diagonalization algorithm. Excitation energies and transi- tion probabilities are obtained by using an effective nucleon-nucleon interaction derived from the CD-Bonn nucleon-nucleon potential. A satisfactory agreement with the experimental data and the previous results for low lying states is achieved.

scholarly journals Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes

2015 ◽  
Vol 91 (2) ◽  
Author(s):  
Tomoaki Togashi ◽  
Noritaka Shimizu ◽  
Yutaka Utsuno ◽  
Takaharu Otsuka ◽  
Michio Honma
Keyword(s):  
Shell Model ◽  
High Spin ◽  
Large Scale ◽  
Spin States ◽  
Model Calculations ◽  
High Spin States ◽  
Unnatural Parity ◽  
Fe Isotopes

scholarly journals Investigation of the level structure of 90Nb nucleus using the shell model

Nukleonika ◽  
2019 ◽  
Vol 64 (4) ◽  
pp. 113-116
Author(s):  
Wu Yi-Heng ◽  
Yang Dong ◽  
Ma Ke-Yan ◽  
Luo Peng-Wei
Keyword(s):  
Shell Model ◽  
Level Structure ◽  
Model Space ◽  
Negative Parity ◽  
Spin States ◽  
Shell Closure ◽  
Model Calculations ◽  
High Spin States ◽  
Single Neutron ◽  
Subshell Closure

Abstract Shell model calculations have been carried out for 90Nb nucleus with the model space in which the valence protons occupy the f5/2, p3/2, p1/2, and g9/2 orbitals and the valence neutrons occupy the p1/2, g9/2, d5/2, and g7/2 orbitals. According to the calculated results, the negative parity is from the contribution of the proton of the f5/2, p3/2, and p1/2 orbits. The moderate spin states of 90Nb are mainly due to the excitation of protons from the f5/2 and p3/2 orbits to the p1/2 and g9/2 orbits across the Z = 38 subshell closure, and the high spin states arise from the excitation of a single neutron from the g9/2 orbit into the d5/2 orbit across the N = 50 shell closure.

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.

Negative-parity high-spin states and a possible magnetic rotation band inPr7659135

2015 ◽  
Vol 92 (5) ◽  
Author(s):  
Ritika Garg ◽  
S. Kumar ◽  
Mansi Saxena ◽  
Savi Goyal ◽  
Davinder Siwal ◽  
...  
Keyword(s):  
High Spin ◽  
Negative Parity ◽  
Magnetic Rotation ◽  
Spin States ◽  
High Spin States ◽  
Rotation Band

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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