Microscopic analysis of order parameters in nuclear quantum phase transitions
Microscopic analysis of order parameters in nuclear quantum phase transitions
复制标题
核量子相变有序参数的微观分析
DOI：
10.1103/physrevc.80.061301
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发表时间：
2009-12
影响因子：
3.1
通讯作者：
Meng, J.
中科院分区：
文献类型：
--
作者：
Niksic, T.;Li, Z. P.;Vretenar, D.;Meng, J.
Nd同位素核基态形状相变的微观签名进行了研究，使用激发光谱和集体波函数通过对角化的五维哈密顿四极振动和旋转自由度，与参数确定的约束自洽相对论平均场计算三轴形状。作为物理控制参数的函数，核子的数量，基态和零角动量的激发振动态之间的能隙，异构体位移，和α跃迁强度在中子数N=90时表现出尖锐的不连续性，这是一阶量子相变的特征。
Microscopic signatures of nuclear ground-state shape phase transitions in Nd isotopes are studied using excitation spectra and collective wave functions obtained by diagonalization of a five-dimensional Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with parameters determined by constrained self-consistent relativistic mean-field calculations for triaxial shapes. As a function of the physical control parameter, the number of nucleons, energy gaps between the ground state and the excited vibrational states with zero angular momentum, isomer shifts, and monopole transition strengths exhibit sharp discontinuities at neutron number N=90, which is characteristic of a first-order quantum phase transition.
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
Iroon Polytechniou-
通讯作者：
Iroon Polytechniou-