中国物理B ›› 2024, Vol. 33 ›› Issue (10): 103101-103101.doi: 10.1088/1674-1056/ad6422
Geometric properties of the first singlet S-wave excited state of two-electron atoms near the critical nuclear charge
Tong Chen(陈彤)1, Sanjiang Yang(杨三江)2,†, Wanping Zhou(周挽平)3, Xuesong Mei(梅雪松)4, and Haoxue Qiao(乔豪学)1,‡
- 1 School of Physics and Technology, Wuhan University, Wuhan 430072, China;
2 College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China;
3 School of Physics and Telecommunications, Huanggang Normal University, Huanggang 438000, China;
4 Wuhan Maritime Communication Research Institute, Wuhan 430072, China
Geometric properties of the first singlet S-wave excited state of two-electron atoms near the critical nuclear charge
Tong Chen(陈彤)1, Sanjiang Yang(杨三江)2,†, Wanping Zhou(周挽平)3, Xuesong Mei(梅雪松)4, and Haoxue Qiao(乔豪学)1,‡
- 1 School of Physics and Technology, Wuhan University, Wuhan 430072, China;
2 College of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, China;
3 School of Physics and Telecommunications, Huanggang Normal University, Huanggang 438000, China;
4 Wuhan Maritime Communication Research Institute, Wuhan 430072, China
摘要： The geometric structure parameters and radial density distribution of 1s2s$\,^1$S excited state of the two-electron atomic system near the critical nuclear charge $Z_{\rm c}$ were calculated in detail under tripled Hylleraas basis set. Contrary to the localized behavior observed in the ground and the doubly excited 2p$^2\,^3{\rm P}^{\rm e}$ 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 $Z_{\rm c}$. This study provides insights into the electronic structure and stability of the two-electron system in the vicinity of the critical nuclear charge.
中图分类号: (High-precision calculations for few-electron (or few-body) atomic systems)
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