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Title: Influence of dense quantum plasmas on fine-structure splitting of Lyman doublets of hydrogenic systems

Abstract

Relativistic calculations are performed to study the effects of oscillatory quantum plasma screening on the fine-structure splitting between the components of Lyman-α and β line doublets of atomic hydrogen and hydrgen-like argon ion within dense quantum plasmas, where the effective two-body (electron–nucleus) interaction is modeled by the Shukla–Eliasson oscillatory exponential cosine screened-Coulomb potential. The numerical solutions of the radial Dirac equation for the quantum plasma-embedded atomic systems reveal that the oscillatory quantum screening effect suppresses the doublet (energy) splitting substantially and the suppression becomes more prominent at large quantum wave number k{sub q}. In the absence of the oscillatory cosine screening term, much larger amount of suppression is noticed at larger values of k{sub q}, and the corresponding results represent the screening effect of an exponential screened-Coulomb two-body interaction. The Z{sup 4} scaling of the Lyman doublet splitting in low-Z hydrogen isoelectronic series of ions in free space is violated in dense quantum plasma environments. The relativistic data for the doublet splitting in the zero screening (k{sub q} = 0) case are in very good agreement with the NIST reference data, with slight discrepancies (∼0.2%) arising from the neglect of the quantum electrodynamic effects.

Authors:
;  [1]
  1. Department of Physics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, West Bengal (India)
Publication Date:
OSTI Identifier:
22410366
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ARGON IONS; COULOMB FIELD; DIRAC EQUATION; ELECTRON-NUCLEON INTERACTIONS; FINE STRUCTURE; HYDROGEN; LYMAN LINES; NUMERICAL SOLUTION; QUANTUM PLASMA; RELATIVISTIC RANGE; SCREENING; SCREENS; TWO-BODY PROBLEM

Citation Formats

De, Madhab, E-mail: madhab2012@gmail.com, and Ray, Debasis, E-mail: ray.debasis@gmail.com. Influence of dense quantum plasmas on fine-structure splitting of Lyman doublets of hydrogenic systems. United States: N. p., 2015. Web. doi:10.1063/1.4921647.
De, Madhab, E-mail: madhab2012@gmail.com, & Ray, Debasis, E-mail: ray.debasis@gmail.com. Influence of dense quantum plasmas on fine-structure splitting of Lyman doublets of hydrogenic systems. United States. doi:10.1063/1.4921647.
De, Madhab, E-mail: madhab2012@gmail.com, and Ray, Debasis, E-mail: ray.debasis@gmail.com. Fri . "Influence of dense quantum plasmas on fine-structure splitting of Lyman doublets of hydrogenic systems". United States. doi:10.1063/1.4921647.
@article{osti_22410366,
title = {Influence of dense quantum plasmas on fine-structure splitting of Lyman doublets of hydrogenic systems},
author = {De, Madhab, E-mail: madhab2012@gmail.com and Ray, Debasis, E-mail: ray.debasis@gmail.com},
abstractNote = {Relativistic calculations are performed to study the effects of oscillatory quantum plasma screening on the fine-structure splitting between the components of Lyman-α and β line doublets of atomic hydrogen and hydrgen-like argon ion within dense quantum plasmas, where the effective two-body (electron–nucleus) interaction is modeled by the Shukla–Eliasson oscillatory exponential cosine screened-Coulomb potential. The numerical solutions of the radial Dirac equation for the quantum plasma-embedded atomic systems reveal that the oscillatory quantum screening effect suppresses the doublet (energy) splitting substantially and the suppression becomes more prominent at large quantum wave number k{sub q}. In the absence of the oscillatory cosine screening term, much larger amount of suppression is noticed at larger values of k{sub q}, and the corresponding results represent the screening effect of an exponential screened-Coulomb two-body interaction. The Z{sup 4} scaling of the Lyman doublet splitting in low-Z hydrogen isoelectronic series of ions in free space is violated in dense quantum plasma environments. The relativistic data for the doublet splitting in the zero screening (k{sub q} = 0) case are in very good agreement with the NIST reference data, with slight discrepancies (∼0.2%) arising from the neglect of the quantum electrodynamic effects.},
doi = {10.1063/1.4921647},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}