Positron scattering from hydrogen atom embedded in dense quantum plasma

Journal Article · Thu Aug 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4819256· OSTI ID:22220693

Bhattacharya, Arka ^[1]; Kamali, M. Z. M. ^[2]; Ghoshal, Arijit ^[1]; Ratnavelu, K. ^[3]

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1. Department of Mathematics, Burdwan University, Golapbag, Burdwan, West Bengal 713 104 (India)
2. Centre for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)
3. Institute of Mathematical Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)

Scattering of positrons from the ground state of hydrogen atoms embedded in dense quantum plasma has been investigated by applying a formulation of the three-body collision problem in the form of coupled multi-channel two-body Lippmann-Schwinger equations. The interactions among the charged particles in dense quantum plasma have been represented by exponential cosine-screened Coulomb potentials. Variationally determined hydrogenic wave function has been employed to calculate the partial-wave scattering amplitude. Plasma screening effects on various possible mode of fragmentation of the system e{sup +}+H(1s) during the collision, such as 1s→1s and 2s→2s elastic collisions, 1s→2s excitation, positronium formation, elastic proton-positronium collisions, have been reported in the energy range 13.6-350 eV. Furthermore, a comparison has been made on the plasma screening effect of a dense quantum plasma with that of a weakly coupled plasma for which the plasma screening effect has been represented by the Debye model. Our results for the unscreened case are in fair agreement with some of the most accurate results available in the literature.

• OSTI ID: 22220693
• Journal Information: Physics of Plasmas, Vol. 20, Issue 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
COULOMB FIELD
EV RANGE
EXCITATION
GROUND STATES
HYDROGEN
LIPPMANN-SCHWINGER EQUATION
POSITRON-ATOM COLLISIONS
POSITRONIUM
POSITRONS
PROTONS
QUANTUM PLASMA
SCATTERING
SCATTERING AMPLITUDES
THREE-BODY PROBLEM
TWO-BODY PROBLEM
VARIATIONAL METHODS
WAVE FUNCTIONS