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arXiv 1504.04162physics.atom-phphysics.chem-ph
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电子附着问题的相对论运动方程耦合团簇方法

Relativistic equation-of-motion coupled-cluster method for the electron attachment problem

Himadri Pathak, Sudip Sasmal, Malaya K. Nayak, Nayana Vaval, Sourav Pal

摘要:

本文在单激发和双激发近似下成功地实现了相对论运动方程耦合团簇方法求解电子附着问题。从闭壳层构型出发,采用相对论EA-EOMCC方法计算了碱金属原子(Li,Na,K,Rb,Cs,Fr)的电离势和LiX(X = H,F,Cl,Br),NaY(Y = H,F,Cl)的垂直电子亲合势。对所有选定的体系进行了四组分和精确双组分计算。此外,我们还考虑了原子系统的自旋-轨道相互作用的影响。将我们的原子计算结果与NIST数据库中的值进行比较,发现结果非常准确(<1%)。

英文摘要:

The article considers the successful implementation of relativistic equation-of-motion coupled cluster method for the electron attachment problem (EA-EOMCC) at the level of single- and double- excitation approximation. The implemented relativistic EA-EOMCC method is employed to calculate ionization potential values of alkali metal atoms (Li, Na, K, Rb, Cs, Fr) and the vertical electron affinity values of LiX (X = H, F, Cl, Br), NaY (Y = H, F, Cl) starting from their closed-shell configuration. Both four-component and exact two-component calculations are done for all the opted systems. Further, we have shown the effect of spin-orbit interaction considering the atomic systems. The results of our atomic calculations are compared with the values from the NIST database and the results are found to be very accurate (< 1 %).

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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