Semiclassical description of proton stopping by atomic and molecular targets

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.55.2821· OSTI ID:530935

Beck, W A ^[1]; Wilets, L ^[1]

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1. Department of Physics, Box 351560, University of Washington, Seattle, Washington 98195-1560 (United States)

In recent years there has been renewed interest in semiclassical methods of modeling atomic structure and collision dynamics. A class of many-body models applied to these problems are descendants of the original work by Kirschbaum and Wilets [Phys. Rev. A {bold 21}, 834 (1980)], who used momentum dependent pseudopotentials to exclude particles from quantum mechanically forbidden regions of phase space. These methods have been used for static, ground-state calculations for increasingly complex atoms, but the calculation of collision cross sections has to date been limited to fairly simple systems. This paper will consider the dependence of collision cross-section calculations on the parameters of the Kirschbaum-Wilets semiclassical model, present a general method for calculation of proton stopping powers by atomic targets, and present results for proton stopping by atomic targets ranging from He to Ne which agree quite well with experiments over a wide range of proton energies. A simple extension of the method to multicenter molecular targets will then be discussed, illustrated by the case of proton stopping by water. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 530935
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 55; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CATIONS
CHARGED-PARTICLE TRANSPORT
ENERGY LOSSES
GROUND STATES
HELIUM
HYDROGEN IONS 1 PLUS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
NEON
PROTONS
SEMICLASSICAL APPROXIMATION
STOPPING POWER
WATER