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A computer program for two-particle intrinsic coefficients of fractional parentage

机译:分母代数的两粒子固有系数的计算机程序

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A Fortran 90 program CESOS for the calculation of the two-particle intrinsic coefficients of fractional parentage for several j-shells with isospin and an arbitrary number of oscillator quanta (CESOs) is presented. The implemented procedure for CESOs calculation consistently follows the principles of antisymmetry and translational invariance. The approach is based on a simple enumeration scheme for antisymmetric many-particle states, efficient algorithms for calculation of the coefficients of fractional parentage for j-shells with isospin, and construction of the subspace of the center-of-mass Hamiltonian eigenvectors corresponding to the minimal eigenvalue equal to 3/2 (in h?ω). The program provides fast calculation of CESOs for a given particle number and produces results possessing small numerical uncertainties. The introduced CESOs may be used for calculation of expectation values of two-particle nuclear shell-model operators within the isospin formalism.
机译:提出了一个Fortran 90程序CESOS,用于计算具有同位旋和任意数量的振子量子(CESO)的多个j壳的分数育种的两粒子固有系数。 CESO计算的已执行程序始终遵循反对称和平移不变性原则。该方法基于针对反对称多粒子状态的简单枚举方案,具有等旋旋的j壳的分数亲子系数计算的高效算法以及与之对应的质子哈密顿特征向量子空间的构造最小特征值等于3/2(以h?ω为单位)。该程序可针对给定的粒子数快速计算CESO,并产生数值不确定性小的结果。引入的CESO可用于计算isospin形式主义内的两粒子核壳模型算子的期望值。

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