Abstract The DIRQFAM code calculates the multipole response of even–even axially symmetric deformed nuclei using the framework of relativistic self-consistent mean-field models. The response is calculated by implementing the finite amplitude method for relativistic quasiparticle random phase approximation. Program summary Program Title: DIRQFAM Program Files doi: http://dx.doi.org/10.17632/6gv8nxg4ns.1 Licensing provisions: GPLv3 Programming language: Fortran 90/95, easily downgradable to FORTRAN 77. External routines/libraries: BLAS/LAPACK, version 3.6.0. or higher. Nature of problem: Multipole response of deformed even–even open-shell nuclei can be calculated using the quasiparticle finite amplitude method (QFAM), based on the relativistic self-consistent mean-field models. The particle–hole channel is described by a zero-range relativistic effective interaction, while the particle–particle channel of the effective inter-nucleon interaction is described by a separable finite-range pairing force. The method can be applied to perform systematic studies of collective modes even in heavy deformed nuclei. Solution method: The current implementation computes the multipole response by solving the QFAM equations in a self-consistent iteration scheme. At each iteration the QFAM solutions are updated using the modified Broyden’s method. The QFAM amplitudes are expanded in the simplex-y harmonic oscillator basis. Restrictions: Open-shell even–even nuclei with axially symmetric ground states are considered. An electric multipole operator with J ≤ 3 is used to calculate the response function. Unusual features: The code should be recompiled before running it with different values of one of the following input parameters: number of oscillator shells in the expansion of nucleon spinors ( n0f ), number of Gauss–Hermite ( NGH ) or Gauss–Laguerre nodes ( NGL ), the multipolarity values that define the external perturbation operator ( J_multipole , K_multipole ).

中文翻译：

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在相对论自洽平均场框架内实现准粒子有限振幅方法：程序 DIRQFAM

摘要 DIRQFAM 代码使用相对论自洽平均场模型框架计算偶偶轴对称变形核的多极响应。通过实施相对论准粒子随机相位近似的有限幅度方法来计算响应。程序摘要 程序名称：DIRQFAM 程序文件 doi：http://dx.doi.org/10.17632/6gv8nxg4ns.1 许可条款：GPLv3 编程语言：Fortran 90/95，可轻松降级到 FORTRAN 77。外部例程/库：BLAS/ LAPACK，版本 3.6.0。或更高。问题性质：基于相对论自洽平均场模型，可以使用准粒子有限振幅法 (QFAM) 计算变形偶数甚至开壳核的多极响应。粒子-空穴通道由零范围相对论有效相互作用描述，而有效核子间相互作用的粒子-粒子通道由可分离的有限范围配对力描述。即使在重变形核中，该方法也可用于对集体模式进行系统研究。求解方法：当前实现通过在自洽迭代方案中求解 QFAM 方程来计算多极响应。在每次迭代中，QFAM 解决方案都使用改进的 Broyden 方法进行更新。QFAM 幅度在单 y 谐振子的基础上扩展。限制条件：考虑具有轴对称基态的开壳偶数核。J ≤ 3 的电多极算子用于计算响应函数。不寻常的功能：