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Title: Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms

Abstract

Formation of Rydberg atoms due to 1s→nlm excitations of hydrogen, for arbitrary n, l, m, by positron impact in weakly coupled plasma has been investigated using a distorted-wave theory in the momentum space. The interactions among the charged particles in the plasma have been represented by Debye-Huckel potentials. Making use of a simple variationally determined wave function for the hydrogen atom, it has been possible to obtain the distorted-wave scattering amplitude in a closed analytical form. A detailed study has been made on the effects of plasma screening on the differential and total cross sections in the energy range 20–300 eV of incident positron. For the unscreened case, our results agree nicely with some of the most accurate results available in the literature. To the best of our knowledge, such a study on the differential and total cross sections for 1s→nlm inelastic positron-hydrogen collisions for arbitrary n, l, m in weakly coupled plasmas is the first reported in the literature.

Authors:
;  [1]
  1. Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal (India)
Publication Date:
OSTI Identifier:
22303666
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED PARTICLES; DISTORTED WAVE THEORY; EV RANGE 01-10; HYDROGEN; PLASMA; POSITRONS; SCATTERING AMPLITUDES; TOTAL CROSS SECTIONS; VARIATIONAL METHODS

Citation Formats

Rej, Pramit, and Ghoshal, Arijit. Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms. United States: N. p., 2014. Web. doi:10.1063/1.4895491.
Rej, Pramit, & Ghoshal, Arijit. Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms. United States. https://doi.org/10.1063/1.4895491
Rej, Pramit, and Ghoshal, Arijit. 2014. "Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms". United States. https://doi.org/10.1063/1.4895491.
@article{osti_22303666,
title = {Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms},
author = {Rej, Pramit and Ghoshal, Arijit},
abstractNote = {Formation of Rydberg atoms due to 1s→nlm excitations of hydrogen, for arbitrary n, l, m, by positron impact in weakly coupled plasma has been investigated using a distorted-wave theory in the momentum space. The interactions among the charged particles in the plasma have been represented by Debye-Huckel potentials. Making use of a simple variationally determined wave function for the hydrogen atom, it has been possible to obtain the distorted-wave scattering amplitude in a closed analytical form. A detailed study has been made on the effects of plasma screening on the differential and total cross sections in the energy range 20–300 eV of incident positron. For the unscreened case, our results agree nicely with some of the most accurate results available in the literature. To the best of our knowledge, such a study on the differential and total cross sections for 1s→nlm inelastic positron-hydrogen collisions for arbitrary n, l, m in weakly coupled plasmas is the first reported in the literature.},
doi = {10.1063/1.4895491},
url = {https://www.osti.gov/biblio/22303666}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 21,
place = {United States},
year = {Mon Sep 15 00:00:00 EDT 2014},
month = {Mon Sep 15 00:00:00 EDT 2014}
}