Calculation of the ground-state energy [ital V][sub 0] of quasifree positrons in rare-gas fluids

Journal Article · Fri Jan 01 00:00:00 EST 1993 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.47.419· OSTI ID:6434531

Plenkiewicz, B; Frongillo, Y; Jay-Gerin, J ^[1]

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1. Faculte de Medecine, Departement de Medecine Nucleaire et de Radiobiologie, Universite de Sherbrooke, Sherbrooke, Quebec, J1H 5N4 (Canada)

The energy [ital V][sub 0] of the bottom of the conduction band (relative to vacuum) of quasifree positrons in rare-gas fluids is calculated as a function of fluid density. The calculations are performed within the framework of the Wigner-Seitz approximation [Phys. Rev. 43, 804 (1933)] for nonpolar fluids, using a semiempirical analytical potential to model the positron--rare-gas-atom interactions. For all the rare gases studied, [ital V][sub 0] is negative and decreases almost linearly with increasing density. Extended to the solid-phase density range, our [ital V][sub 0] calculations are in good agreement with available experimental data for rare-gas crystals.

• OSTI ID: 6434531
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 47:1; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
RARE GASES
POSITRON-ATOM COLLISIONS
DENSITY
ENERGY LEVELS
GROUND STATES
WIGNER-SEITZ METHOD
ATOM COLLISIONS
CALCULATION METHODS
COLLISIONS
ELEMENTS
FLUIDS
GASES
NONMETALS
PHYSICAL PROPERTIES
POSITRON COLLISIONS
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)