Rotational Bands of Some Neutron Deficient Odd-A Pt Isotopes in Particle-Triaxial-Rotor Model

Theoretical calculations are performed for neutron deficient Pt isotopes ¹⁷⁷Pt and ^175,173,171Pt in the particle-triaxial-rotor model with variable moment of inertia. The obtained energy spectra agree with experimental data quite well. The calculated results indicate that all these nuclei are in triaxial rotation with ¹⁷⁷Pt being in prolate and ^175,173,171Pt in oblate. Several levels are predicted for the 13/2⁺ band in ¹⁶⁹Pt.