Geometric properties of the first singlet S-wave excited state of two-electron atoms near the critical nuclear charge

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外文摘要：The geometric structure parameters and radial density distribution of 1s2s 1S excited state of the two-electron atomic system near the critical nuclear charge Zc were calculated in detail under tripled Hylleraas basis set.Contrary to the localized behavior observed in the ground and the doubly excited 2p2 3pe states,for this state our results identify that while the behavior of the inner electron increasingly resembles that of a hydrogen-like atomic system,the outer electron in the excited state exhibits diffused hydrogen-like character and becomes perpendicular to the inner electron as nuclear charge Z approaches Zc.This study provides insights into the electronic structure and stability of the two-electron system in the vicinity of the critical nuclear charge.

外文关键词：

critical nuclear chargetwo-electron atomic systemgeometric structuredensity distribution

作者：

陈彤、杨三江、周挽平、梅雪松、乔豪学

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作者单位：

School of Physics and Technology,Wuhan University,Wuhan 430072,China

College of Physics and Electronic Science,Hubei Normal University,Huangshi 435002,China

School of Physics and Telecommunications,Huanggang Normal University,Huanggang 438000,China

Wuhan Maritime Communication Research Institute,Wuhan 430072,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

120742951230427112104420

出版年：

2024

DOI：

10.1088/1674-1056/ad6422

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(10)