Bohr Hamiltonian with different mass parameters applied to band structures of Eu isotopes built on Nilsson orbitals

摘要

The band structure of the proton-odd nuclei $^{153,155}$Eu, built on Nilsson orbitals, is investigated within the framework of a recently developed extended Bohr Hamiltonian model. The relative distance between spherical orbitals is taken into account by considering single-particle energies as a parameter which changes with increasing neutron number. Energy levels of each band and$B(E2)$ values inside the ground-state band are calculated and compared with the available experimental data. Thus, more comprehensive information on the structure of deformed nuclei can be obtained by studying the rotationa€“vibration spectra of odd nuclei built on Nilsson single-particle orbitals.