THEORETICAL INVESTIGATION OF POSITIVE PARITY BAND STRUCTURE OF Y AND Nb ISOTOPES

2012 ◽  
Vol 21 (10) ◽  
pp. 1250081 ◽  
Author(s):  
CHETAN SHARMA ◽  
PREETI VERMA ◽  
SURAM SINGH ◽  
ARUN BHARTI ◽  
S. K. KHOSA
Keyword(s):  
Band Structure ◽  
Transition Probabilities ◽  
Positive Parity ◽  
Energy Splitting ◽  
Shape Evolution ◽  
Projected Shell Model ◽  
Parity Band ◽  
Reduced Transition Probabilities ◽  
Positive Parity Band ◽  
Structure Properties

The positive parity band structure of odd mass neutron-rich 97 – 103 Y and 99 – 105 Nb nuclei has been studied using microscopic technique known as the projected shell model (PSM) with the deformed single-particle states generated by the standard Nilsson potential. The nuclear structure properties like yrast spectra, energy splitting, moment of inertia, rotational frequencies and reduced transition probabilities B(M1) and B(E2) have been calculated and their comparison with the available experimental data has been made. A shape evolution has also been predicted in these isotopes as one moves from 97 Y to 99 Y and 99 Nb to 101 Nb . The PSM calculations also demonstrate the multi-quasiparticle structure in these nuclei.

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.

Projected Shell Model Description of Positive Parity Band of 130Pr Nucleus

2017 ◽  
Vol 48 (1) ◽  
pp. 85-91
Author(s):  
Suram Singh ◽  
Amit Kumar ◽  
Dhanvir Singh ◽  
Chetan Sharma ◽  
Arun Bharti ◽  
...  
Keyword(s):  
Shell Model ◽  
Positive Parity ◽  
Model Description ◽  
Projected Shell Model ◽  
Parity Band ◽  
Positive Parity Band

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 .

CONFIGURATION ASSIGNMENT OF THE POSITIVE-PARITY STRUCTURES IN 108Ag

2011 ◽  
Vol 20 (11) ◽  
pp. 2351-2359 ◽  
Author(s):  
C. LIU ◽  
S. Y. WANG ◽  
B. QI ◽  
D. P. SUN ◽  
C. J. XU ◽  
...  
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Positive Parity ◽  
Spin States ◽  
High Spin States ◽  
Parity Band ◽  
Configuration Assignment ◽  
Higher Spins ◽  
Band Crossing ◽  
Positive Parity Band

The high-spin states of 108 Ag have been studied by the in-beam γ spectroscopy with the reaction 104 Ru (7 Li ,3n)108 Ag at a beam energy of 33 MeV. The previously known positive-parity band structures have been extended up to higher spins. Their configurations are discussed based on alignments, band-crossing frequencies, and B(M1)/B(E2) ratios.

scholarly journals Population of a low-spin positive-parity band from high-spin intruder states in 177Au: The two-state mixing effect

2020 ◽  
Vol 806 ◽  
pp. 135488 ◽  
Author(s):  
M. Venhart ◽  
M. Balogh ◽  
A. Herzáň ◽  
J.L. Wood ◽  
F.A. Ali ◽  
...  
Keyword(s):  
High Spin ◽  
Positive Parity ◽  
Mixing Effect ◽  
Parity Band ◽  
State Mixing ◽  
Positive Parity Band ◽  
Intruder States

scholarly journals Structure of a positive-parity band in 130Pr

2017 ◽  
Vol 53 (1) ◽  
Author(s):  
K. Y. Ma ◽  
J. B. Lu ◽  
X. Xu ◽  
Y. M. Liu ◽  
Z. Zhang ◽  
...  
Keyword(s):  
Positive Parity ◽  
Parity Band ◽  
Positive Parity Band

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 High Spin Structure of 122Xe

2020 ◽  
Vol 6 ◽  
pp. 140
Author(s):  
M. Serris ◽  
Et al.
Keyword(s):  
High Spin ◽  
Beam Energy ◽  
Spin Structure ◽  
Positive Parity ◽  
Spectroscopic Methods ◽  
Spin States ◽  
High Spin States ◽  
Parity Band ◽  
Γ Ray ◽  
Positive Parity Band

High spin states in the isotope 122Xe  were populated using the reaction 96Zn(30Si,2n)122Xe at a beam energy of 135 MeV. The subsequent γ-ray deexcitation was studied using γ-ray spectroscopic methods. The analysis of γ-γ coincidences has revealed two new structures of competing dipole and quadrupole transitions. The highest states of a positive parity band provide characteristics consistent with an approach to band termination.

Study of high spin states in 149Tb observed by the (10B,3n) reaction

1979 ◽  
Vol 57 (11) ◽  
pp. 1959-1968 ◽  
Author(s):  
N. C. Singhal ◽  
M. W. Johns ◽  
J. V. Thompson
Keyword(s):  
High Spin ◽  
Energy Levels ◽  
Negative Parity ◽  
Positive Parity ◽  
Angular Distributions ◽  
Spin States ◽  
Core Nucleus ◽  
High Spin States ◽  
Parity Band ◽  
Positive Parity Band

Energy levels in 149Tb have been studied by the 142Nd (10B,3n) reaction using 54 MeV 10B beams from the McMaster University FN accelerator. Excitation functions, angular distributions, prompt γ–γ coincidence, electron conversion, and linear polarization measurements were obtained. On the basis of these measurements we have identified two rotaition-aligned πh11/2 bands, a negative parity band up to spin 27/2−, and a positive parity band up to spin 27/2+. The energy spacings between levels in these bands strongly resemble those in the ground state and the 3− octupole band of the adjacent 148Gd core nucleus. Other high spin positive parity states up to spin of 41/2 are also observed. These high spin states show some evidence of rotational structure in 14 9Tb.

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