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arXiv 2404.01460physics.chem-phphysics.atom-ph
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分子二聚体光电离的高效组态相互作用模型

Efficient configuration-interaction models for photoionization of molecular dimers

Julio C Ruivo, Thomas Meltzer, Alex G Harvey, Jakub Benda, Zdeněk Mašín

AI总结:

本文提出基于 ORMAS 的高效组态相互作用模型,用于 NH3 和 HCOOH 单体和二聚体的 R 矩阵光电离计算,结果与 CAS 一致且 SD 激发模型符合实验数据,可推广至复杂分子体系。

摘要:

我们提出了分子单体和二聚体光电离的 R 矩阵计算,重点关注氨(NH3)和甲酸(HCOOH),利用包括 Occupation-Restricted Multiple Active Space(ORMAS)方法在内的组态相互作用模型。我们表明,ORMAS 是计算光电离可观测量的一种高效选择,所得结果与使用要求高得多的组态相互作用方法 Complete Active Space(CAS)获得的结果高度一致。我们证明,相对于 Hartree-Fock 组态包含单激发和双激发(SD)的模型与实验数据吻合良好。本文发展的方法可以方便地应用于研究复杂分子体系中的光电离。

英文摘要:

We present R-matrix calculations of photoionization of molecular monomers and dimers, focusing on ammonia (NH3) and formic acid (HCOOH), utilizing configuration-interaction models including the Occupation-Restricted Multiple Active Space (ORMAS) approach. We show that ORMAS is a highly efficient choice for calculating photoionization observables, yielding results that are in excellent agreement with those obtained using the much more demanding configuration-interaction method, Complete Active Space (CAS). We demonstrate that models incorporating single and double (SD) excitations with respect to the Hartree-Fock configuration provide good agreement with experimental data. The approach developed here can be readily applied to study photoionization in complex molecular systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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