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arXiv 1407.3563nucl-th
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摆动模的集体哈密顿量

Collective Hamiltonian for wobbling modes

Q. B. Chen, S. Q. Zhang, P. W. Zhao, J. Meng

摘要:

在集体哈密顿量的框架内,系统地研究了简单、纵向和横向摆动,其中包含的集体势和质量参数是基于斜轴曲柄方法得到的。通过对角化求解集体哈密顿量,得到了摆动态的能量和波函数。并与谐波近似公式和粒子转子模型的计算结果进行了比较。由集体哈密顿量计算的摆动能比谐波近似公式更接近粒子转子模型的精确解。它被证实,摆动频率增加与旋转频率在简单和纵向摆动运动,而减少在横向摆动运动。这些变化趋势与集体哈密顿量中集体势的刚度有关。

英文摘要:

The simple, longitudinal, and transverse wobblers are systematically studied within the framework of collective Hamiltonian, where the collective potential and mass parameter included are obtained based on the tilted axis cranking approach. Solving the collective Hamiltonian by diagonalization, the energies and the wave functions of the wobbling states are obtained. The obtained results are compared with those by harmonic approximation formula and particle rotor model. The wobbling energies calculated by the collective Hamiltonian are closer to the exact solutions by particle rotor model than harmonic approximation formula. It is confirmed that the wobbling frequency increases with the rotational frequency in simple and longitudinal wobbling motions while decreases in transverse wobbling motion. These variation trends are related to the stiffness of the collective potential in the collective Hamiltonian.

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