Rotational Property of~(249)Cm in Particle-Triaxial-Rotor Model

We study the rotational energy spectrum and deformationfeature 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 parametersβ andγ of the nucleus. The calculated results indicate that the high spin band of ²⁴⁹Cm is built upon theν620](1/2)⁺configuration with deformation parametersβ = 0.296 and
γ= 7.5^o and the bands based on theν622](3/2)⁺,ν 613](7/2)⁺,ν750](1/2)^- configuration respectively are also the ones with quite large axial deformation but small triaxial deformation.