[en] Theoretical investigation of energy bands of ^123,125Ce is performed by applying the projected shell model approach. The present calculation is viewed to reproduce the known experimental data of these nuclei, qualitatively. Not only this, the configurations of diverse bands are also obtained by an analysis of the band diagrams. The low-lying states of the bands are seen to arise from one quasiparticle configuration whereas the high-spin states arise from multi-quasiparticle configurations. The signature partner band of negative parity band is predicted in ¹²³Ce. The ground state bands and relative energies of some bands with respect to them are predicted in ^123,125Ce that can be helpful for future experiments

[en] The structure of observed rotational bands in "1"6"0"–"1"6"4Ho isotopes have been studied by employing projected shell model approach. The theoretical results have been obtained for the band spectra, transition energies and electromagnetic quantities for the experimentally known bands in these isotopes. The theoretical results for band spectra and electromagnetic properties are found to be in reasonably good agreement with most of the observed ones.

[en] The yrast spectra with J_max^π = 10⁺, B(E2) transition probabilities and Q_J+ values are calculated for even-even ruthenium isotopes by carrying out variation after projection (VAP) calculations in conjunction with the Hartree-Fock-Bagoliubov (HFB) ansatz employing a pairing-plus-quadrupole-quadrupole effective interaction operating in a reasonably large valence space outside the ⁷⁶Sr core. Our calculations describe the shape changes as a function of mass number for ruthenium isotopes and also reveal that both the HFB technique as well as the quadrupole-plus-pairing-quadrupole model of the two-body interaction are fairly reliable in this mass region. (author)

[en] In the present paper, the systematic investigation of potential energy surfaces (PESs) has been presented in order to study the development of shape evolution with the variation in neutron number in the ground states of axially deformed even-even ^104-144Te isotopes. Relativistic-Hartree-Bogoliubov model has been employed to study PES plots with the help of density-dependent point coupling effective parameters (DD-PCX). The obtained results have predicted the shape transition from prolate to oblate, oblate to spherical and spherical to prolate deformation in these isotopes. The calculated results have also predicted the shape coexistence in ^{116, 118, 126, 128}Te isotopes. Besides this, various ground state properties like mass excess, two neutron separation energies, root mean square radii of neutrons and protons and charge radii have also been studied as a function of neutron number. The calculated results are also compared with the published theoretical results by using DD-ME2, DD-PC1, PC-PK1, BSkG2, FRDM and Gogny D1S interactions and are found to be in good agreement with predictions made by the relativistic mean field calculations employing the DD-ME2, DD-PC1, PC-PK1 interaction parameters. (author)

[en] Variation after Projection calculations in conjunction with Hartree Bogoliubov Ansatz have been carried out for ^124-132Ce mass chain. In this framework, the yrast spectra, B(E2) transition probabilities and occupation numbers for various shell model orbits have been obtained. The observed decrease in deformation in going from ¹²⁴Ce to ¹³²Ce is seen to arise due to a slow decrease in the occupation of 1g_7/2 proton orbit and a systematic increase in the occupations of 2d_5/2, 1g_7/2 and 1h_11/2 neutron orbits. Besides this, the experimental low-lying yrast spectra and B(E2) transition probabilities are reproduced with reasonable accuracy by using PQOH interaction. (author)

[en] In order to understand the mechanism of backbending, an attempt has been made to study the neutron-deficient Ce isotopes

[en] The ground state nuclear structure properties of the proton rich even-even tellurium isotopes are studied by using Gogny energy density functional within the framework of Hartree-Fock-Bogoliubov (HFB) method. The HFB equations are solved by using the axial cylindrical transformed deformed harmonic oscillator basis. The full parameterization of Gogny energy density functional is employed in the present study. The evolution of the neutron density distributions with an increase in neutron number is studied and emergence of various nuclear structure phenomena is investigated. Besides this, the ground state nuclear structure properties such as nuclear multipole moments, deformation parameters, binding energies, pairing energies, root mean square radii and charge radii are obtained for the even-even proton-rich tellurium isotopes. The theoretical results on the nuclear ground state properties are compared with the available experimental data and good agreement is found. (author)

[en] Variation after projection (VAP) calculations with Hartree-Bogoliubov (HB) Ansatz have been carried out for A=120-136 barium isotopes. In this framework, the yrast spectra with J_max^π=10⁺, B(E2) transition probabilities, quadrupole (β₂) and hexadecapole (β₄) deformation parameters for even-even barium isotopes have been obtained. The results of the calculation give an indication that it is important to include the hexadecapole-hexadecapole component of the two-body interaction for obtaining various nuclear structure quantities in these barium isotopes. (author)

[en] The present paper embodies an attempt made to understand the mechanism behind the manner in which the transition from sphericity to deformation occurs and the causes responsible for the occurrence of phase transition for N<82 and N>82 Sm isotopes

[en] (GMR) has captivated the attention of the scientific community, as evidenced by a various studies and discussions. This resonance, an intrinsic property of atomic nuclei, offers invaluable insights into nuclear incompressibility. In this investigation, the relativistic Quasiparticle Finite Amplitude Method (QFAM) has been employed to systematically analyze the attributes of the isoscalar monopole strength within the ^144-152Sm and ^116-122Sn isotopic-mass range. This approach involved theoretical calculations to derive the strength function. This analysis was carried out using two distinct parameterizations: the density-dependent meson-exchange (DDME2) and the density-dependent point coupling (DD-PCX). These calculations were performed within the framework of an axially-deformed harmonic oscillator basis. In this study, the analysis of isoscalar giant monopole resonance (GMR) strength functions of the ^144-152Sm and ^116-122Sn isotopes have been done by employing the DD-ME2 and DD-PCX parametrizations, and have compared them to the experimental available data. The findings demonstrate a good agreement between our calculated GMR strength functions using the DDME2 interaction and the experimental measurements, both for the Sm isotopes and the Sn isotopes