Doubly Excited States of Beryllium-Like Ions ($Z = 4$–10) in Dense Quantum Plasmas

IF 1.7 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Few-Body Systems Pub Date : 2024-06-03 DOI:10.1007/s00601-024-01935-z

Nirvik Masanta, Arijit Ghoshal, Yew Kam Ho

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Abstract

The doubly excited states (DES) of beryllium-like ions (BLI) embedded in dense quantum plasma (QP) have been investigated by applying the stabilization method. Ions having atomic number Z lying between 4 to 10 are considered and treated as an effective three-body system by means of the ‘method of model potential’. Exponential cosine screened Coulomb potential is used to describe the screened interactions among the charged particles in QP. Using an extensive wavefunction, it has been possible to detect the existence of one, four and five DESs lying above the $1s^22p$ threshold in the ions having $Z = 4$, $Z = 5$ and $Z = 6$–10 respectively. The energies and widths of these states for the plasma-free case agree nicely with the reliable results available in the literature. A detailed study has been made to explore the changes in the energies and widths of these states subject to the varying screening effect of the background quantum plasma environment. Furthermore, Z-dependence of the changes induced by the plasma has also been investigated in detail.

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致密量子等离子体中类铍离子（$$Z = 4$$ -10）的双激发态

应用稳定化方法研究了嵌入致密量子等离子体（QP）中的类铍离子（BLI）的双激发态（DES）。原子序数 Z 介于 4 到 10 之间的离子被视为有效的三体系统，并通过 "模型势方法 "进行处理。指数余弦屏蔽库仑势用于描述 QP 中带电粒子之间的屏蔽相互作用。通过使用一个广泛的波函数，我们可以探测到在$Z = 4$, $Z = 5$ 和$Z = 6$-10 离子中分别存在一个、四个和五个高于$1s^22p$阈值的DES。无等离子体情况下这些态的能量和宽度与文献中的可靠结果非常吻合。为了探索这些态的能量和宽度在背景量子等离子体环境的不同屏蔽效应下的变化，我们进行了详细的研究。此外，还详细研究了等离子体诱导变化的 Z 依赖性。

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来源期刊

Few-Body Systems 物理-物理：综合

CiteScore

2.90

自引率

18.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Few-Body Systems presents original research work – experimental, theoretical and computational – investigating the behavior of any classical or quantum system consisting of a small number of well-defined constituent structures. The focus is on the research methods, properties, and results characteristic of few-body systems. Examples of few-body systems range from few-quark states, light nuclear and hadronic systems; few-electron atomic systems and small molecules; and specific systems in condensed matter and surface physics (such as quantum dots and highly correlated trapped systems), up to and including large-scale celestial structures. Systems for which an equivalent one-body description is available or can be designed, and large systems for which specific many-body methods are needed are outside the scope of the journal. The journal is devoted to the publication of all aspects of few-body systems research and applications. While concentrating on few-body systems well-suited to rigorous solutions, the journal also encourages interdisciplinary contributions that foster common approaches and insights, introduce and benchmark the use of novel tools (e.g. machine learning) and develop relevant applications (e.g. few-body aspects in quantum technologies).

Doubly Excited States of Beryllium-Like Ions (\(Z = 4\)–10) in Dense Quantum Plasmas

Abstract