Rotational Property of 249Cm in Particle-Triaxial-Rotor Model

We study the rotational energy spectrum and deformation feature of very heavy nucleus 249Cm in the particle-triaxial-rotor model with variable moment of inertia. Such a nucleus is the unique one involving both multi-band structure and high spin states and locating very near the superheavy region. By calculating the energy spectrum, we determine the configurations and quadrupole and triaxial deformation parameters β and γ of the nucleus. The calculated results indicate that the high spin band of 249Cm is built upon the configuration with deformation parameters β = 0.296 and γ = 7.5° and the bands based on the configuration respectively are also the ones with quite large axial deformation but small triaxial deformation.