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In this study, the ground-state properties of the platinum isotopic chain, 160-238Pt are studied within the covariant density functional theory. The calculations are carried out for a large number of eveneven Pt isotopes by using the density-dependent point-coupling and the density dependent meson-exchange effective interactions. Several ground-state properties such as the binding energy, separation energy and quadrupole deformation are discussed and compared with available experimental data, and with the predictions of some nuclear models such as the Relativistic Mean Field (RMF) model with NL3* functional and the Hartree Fock Bogoliubov (HFB) method with UNEDF0 Skyrme force. The shape phase transition for Pt isotopic chain is also studied. [ABSTRACT FROM AUTHOR]

In this work, the ground state properties of the platinum isotopic chain, 1 6 0 − 2 3 8 Pt are studied within the covariant density functional theory. The calculations are carried out for a large number of even–even Pt isotopes by using the density-dependent point-coupling and the density-dependent meson-exchange effective interactions. All ground state properties such as the binding energy, separation energy, two-neutron shell gap, root mean square (rms)-radii for neutrons and protons and quadrupole deformation are discussed and compared with available experimental data, and with the predictions of some nuclear models such as the Relativistic Mean Field (RMF) model with NL3 functional and the Hartree–Fock–Bogoliubov (HFB) method with SLy4 Skyrme force. The shape phase transition for Pt isotopic chain is also studied. Its corresponding total energy curves as well as the potential energy surfaces confirm the transition from prolate to oblate shapes at 1 8 8 Pt contrary to some studies predictions and in agreement with others. Overall, a good agreement is found between the calculated and experimental results wherever available. [ABSTRACT FROM AUTHOR]

Rotation-aligned isomeric states and associated oblate collective sequences are established in even Pt isotopes. Reduced E 2 transition probabilities for the deexcitation of the 12 + isomers indicate an abrupt and unexpected quenching of oblate collectivity around neutron number N = 120 . Structure and shape evolution at high spin in the heaviest stable isotopes is found to be markedly different from observations in the lighter ones. [ABSTRACT FROM AUTHOR]

The systematic investigation of shape evolution between spherical U(5) and γ-unstable O(6) for Mo isotopes has been carried out by the microscopic quadrupole constrained relativistic mean field model plus BCS method with all the most used interactions, i.e. PK1, NL3, TM1 and NLSH. The calculated potential energy surfaces show a clear shape evolution for the even–even Mo isotopes with N = 50~64 and 94Mo is suggested to be the γ-unstable nucleus, which is favored by the experimental data. Similar conclusion is also drawn from the neutron single particle spectra. [ABSTRACT FROM AUTHOR]