Microscopic study of nuclear structure of odd-odd 128–138I nuclei within the framework of projected shell model for positive- and negative-parity states

2020 ◽  
Vol 35 (29) ◽  
pp. 2050243 ◽  
Author(s):  
Vikesh Kumar ◽  
Shashi K. Dhiman
Keyword(s):  
Shell Model ◽  
Nuclear Structure ◽  
Microscopic Study ◽  
Single Particle ◽  
Negative Parity ◽  
Model Analysis ◽  
Energy Splitting ◽  
Projected Shell Model ◽  
Band Structures ◽  
Quasi Particle

We have done the microscopic study of neutron-rich odd-odd iodine isotopes within the framework of projected shell model. Odd-odd nuclei are the best candidates for studying possible structure variations away from the valley of stability. We used the projected shell model, in which the deformed Nilsson single-particle states are being used for the construction of model basis. We studied the band properties of odd-odd I[Formula: see text](Z [Formula: see text] 53) isotopes with neutron numbers N [Formula: see text] 75, 77, 79, 81, 83 and 85. Using model analysis, we presented the low-lying positive- and negative-parity states of these nuclei. In these isotopes, the band structures have been analyzed in terms of quasi-particle configurations and comparative presentation of yrast levels is discussed. The phenomenon of yrast energy splitting is also studied in this work.

Band structure of odd-mass lanthanum nuclei

2014 ◽  
Vol 23 (04) ◽  
pp. 1450020
Author(s):  
Deepti Sharma ◽  
Preeti Verma ◽  
Suram Singh ◽  
Arun Bharti ◽  
S. K. Khosa
Keyword(s):  
Band Structure ◽  
Shell Model ◽  
Nuclear Structure ◽  
Transition Probabilities ◽  
Theoretical Data ◽  
Negative Parity ◽  
Projected Shell Model ◽  
Experimental Feature ◽  
Reduced Transition Probabilities ◽  
Structure Properties

Negative parity energy states in 121–131 La have been studied using Projected Shell Model (PSM). Some nuclear structure properties like yrast spectra, back-bending in moment of inertia, reduced transition probabilities and band diagrams have been described. The experimental feature of the co-existence of prolate–oblate shapes in 125–131 La isotopes has been satisfactorily explained by PSM results. Comparison of the theoretical data with their experimental counterparts has also been made. From the calculations, it is found that the yrast states arise because of multi-quasiparticle states.

Study of 242−248Cm isotopes in the projected shell model framework

2016 ◽  
Vol 25 (04) ◽  
pp. 1650024
Author(s):  
Saiqa Sadiq ◽  
Rani Devi ◽  
S. K. Khosa
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Transition Probabilities ◽  
Negative Parity ◽  
Yrast Band ◽  
Spin States ◽  
Particle Structure ◽  
Projected Shell Model ◽  
Model Framework ◽  
Quasi Particle

The projected shell model framework is employed to study the band spectra in [Formula: see text]Cm isotopes. The present calculations reproduce the available experimental data on the yrast bands. Besides this, B(E2) transition probabilities of even–even Cm isotopes have also been calculated. The low spin states of yrast band are seen to arise purely from zero-quasi-particle (o-qp) intrinsic states whereas the high spin states have multi-quasi-particle structure. For the odd-neutron (odd-[Formula: see text]) isotopes, the calculated results qualitatively reproduce the available data on ground and lowest excited state bands for [Formula: see text]Cm. However, for [Formula: see text]Cm the negative-parity ground state band is in reasonable agreement with the experimental data.

Microscopic study of nuclear structure dynamics of neutron-deficient even–even 100–110Cd isotopes within the framework of projected shell model

2020 ◽  
Vol 35 (23) ◽  
pp. 2050189
Author(s):  
Pankaj Kumar ◽  
Shashi K. Dhiman
Keyword(s):  
Band Structure ◽  
Shell Model ◽  
Nuclear Structure ◽  
Microscopic Study ◽  
Projected Shell Model ◽  
Ground Band ◽  
Structure Dynamics ◽  
Mass Chain ◽  
Deformed Nucleus ◽  
Cd Isotopes

We have studied the deformation systematics of [Formula: see text] and [Formula: see text] values, yrast spectra, band structure and backbending phenomena in the neutron-deficient even–even [Formula: see text]Cd isotopes within the projected shell model (PSM) framework. The observations of the systematics of [Formula: see text] and [Formula: see text] values for [Formula: see text]Cd isotopes are well reproduced in present calculations. Our observations show that, as we move from [Formula: see text]Cd to [Formula: see text]Cd, the deformation increases and then it reduces up to [Formula: see text]Cd. This gives us a confirmation that [Formula: see text]Cd is the most deformed nucleus in this set of isotopic mass chain. The backbending phenomena is also observed in these isotopes, which can be related to the crossing of ground band (g-band) by 2-quasiparticle (qp) bands or s-bands. The pseudomagic character of [Formula: see text]Cd has also been observed.

MICROSCOPIC STUDY OF NEGATIVE PARITY YRAST STATES IN NEUTRON-DEFICIENT 119–127Ba ISOTOPES

2011 ◽  
Vol 20 (05) ◽  
pp. 1183-1201 ◽  
Author(s):  
ARUN BHARTI ◽  
SURAM SINGH ◽  
S. K. KHOSA
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Microscopic Study ◽  
Energy Levels ◽  
Negative Parity ◽  
Band Head ◽  
Projected Shell Model ◽  
Transition Energies ◽  
Yrast Bands ◽  
Model Approach

The negative parity yrast bands of neutron-deficient 119–127 Ba nuclei are studied by using the Projected Shell Model approach. Energy levels, transition energies and B(M1)/B(E2) ratios are calculated and compared with the available experimental data. The calculations reproduce the band head spins of negative parity yrast bands and indicate the multi-quasiparticle structure for these bands.

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 .

scholarly journals Superdeformed band in the N = Z + 4 nucleus 40Ar : A projected shell model analysis

2018 ◽  
Vol 54 (12) ◽  
Author(s):  
Ying-Chun Yang ◽  
Yan-Xin Liu ◽  
Yang Sun ◽  
Mike Guidry
Keyword(s):  
Shell Model ◽  
Model Analysis ◽  
Superdeformed Band ◽  
Projected Shell Model

scholarly journals Triaxial projected shell model description of high-spin band-structures in 103,105 Rh isotopes

2014 ◽  
Vol 738 ◽  
pp. 218-222 ◽  
Author(s):  
G.H. Bhat ◽  
J.A. Sheikh ◽  
W.A. Dar ◽  
S. Jehangir ◽  
R. Palit ◽  
...  
Keyword(s):  
Shell Model ◽  
High Spin ◽  
Model Description ◽  
Projected Shell Model ◽  
Band Structures

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.

Sign in / Sign up

Export Citation Format

Share Document