Development of various methods to the investigation of the spectral properties and collision dynamics of H‐like ions taking place in dense and hot plasma environments. Issue 4 (18th November 2021)

• Record Type: Journal Article
• Authors: Chen, Zhan‐Bin; Liu, Peng‐Fei; Sun, Hua‐Yang; Qi, Yue‐Ying; Zhao, Guo‐Peng; Shen, Xiao‐Zhi; Jiao, Li‐Guang; Ma, Kun; Wang, Kai; Li, Xiang‐Dong
• Is Part Of: International journal of quantum chemistry. Volume 122:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-11-18
• Subjects: collision dynamics -- H‐like ions -- dense and hot plasma; Quantum chemistry -- Periodicals; 541.28
• DOI: 10.1002/qua.26842
• Languages: English
• ISSNs: 0020-7608

Abstract

Abstract: The correct understanding of the behavior of highly stripped ions immersed in a dense plasma environment is a hitherto challenge for theory and it is of importance in various applications. Here, we developed four kinds of novel theoretical models to the determination of the spectral properties and collision dynamics of H‐like ions in dense and hot plasmas by employing the analytical potential [Li et al., Phys. Plasmas 2019, 26, 033301] to describe the interactions among the charged particles: (i) The electron photon processes in plasma model within the relativistic scheme; (ii) The multiconfiguration Dirac–Fock model within the framework of relativistic self‐consistent iteration approximation; (iii) The generalized pseudospectral method within the relativistic framework; and (iv) An analytic formula based on the Hartree–Fock method and the irreducible tensor theory within the non‐relativistic regime, derived from a solution of Schrödinger equation. As a typical example, energy eigenvalues, radiative transition properties, spectral line shifts, and electron impact excitation and ionization cross sections of the selected N 6+ and Ne 9+ ions are determined for several temperature‐density cases, characteristic of inertial confinement fusion plasmas. A comparison of these results with each other and the results from earlier calculations as well as with the available experimental data is provided. Systematic trend is determined for all the properties under study concerning increased screening. The present study not only extends our understanding of the dense plasma shielding effects, but also opens the way for future investigations allowing accurate predictions of spectral properties of ions in dense and hot plasmas aimed at providing precision data for various practical applications. Abstract : The paper presents an investigation of the atomic structure and collisional cross section of H‐like ions embedded in hot and dense plasmas. The strength of the work is that four different theoretical approaches were used and compared. The presentation of the results as well as their comparison are detailed and the conclusions as well as the perspectives of improvement of the calculations are drawn.