Soft-electron emission peak in ion-helium collisions

Journal Article · Wed Sep 01 00:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.2012· OSTI ID:6023716

Garibotti, C R; Cravero, W R ^[1]

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1. Centro Atomico Bariloche and Consejo Nacional de Investigaciones Cientificas y Tecnicas, 8400 Bariloche (Argentina)

We study the angular distribution of electrons, emitted in ion-helium collisions, with low velocities relative to the target. We use an expansion of the ionization doubly differential cross section, in Legendre polynomials, with electron velocity-dependent weight coefficients that define the angular shape of the distribution. We determine these coefficients from available experimental data for H[sup +], He[sup 2+], C[sup 6+], and O[sup 8+] projectiles at 1- and 1.84-MeV impact energies, and we evaluate them by using the first Born and the continuum-distorted-wave--eikonal-initial-state (CDW-EIS) approximations. The experimental results and CDW-EIS calculations confirm the existence of forward-backward asymmetry in the soft-electron emission peak. We discuss the dependence of theoretical and experimental parameters on the impact energy and the charge of the projectile.

• OSTI ID: 6023716
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:3; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ASYMMETRY
ATOM COLLISIONS
BARYONS
CARBON IONS
CHARGED PARTICLES
COLLISIONS
DISTRIBUTION
ELECTRON EMISSION
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
FLUIDS
GASES
HADRONS
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
MEV RANGE
NONMETALS
NUCLEONS
OXYGEN IONS
PROTONS
RARE GASES
SPECTRA
TARGETS