Differential double excitation cross sections in proton-helium collisions studied by energy-loss spectroscopy

Journal Article · Mon Sep 05 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.1348· OSTI ID:6952856

Htwe, W T; Vajnai, T; Barnhart, M; Gaus, A D; Schulz, M ^[1]

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1. Department of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri-Rolla, Rolla, Missouri 65401 (United States)

We have measured ion energy-loss spectra for 150 keV proton-helium collisions as a function of the projectile scattering angle. From the data we obtained double excitation cross sections differential in the proton scattering angle as well as the ratios of both double excitation and single ionization to single excitation. In these ratios pronounced peak structures are observed at about 0.7 mrad. Two alternative interpretations of these peak structures are offered: They may be due to binary collisions between the projectile and the target electrons, or they could be a manifestation of an interference between different transition amplitudes leading to the same final state of the collision.

• OSTI ID: 6952856
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:10; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BARYONS
COLLISIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LOSSES
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FERMIONS
FLUIDS
GASES
HADRONS
HELIUM
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
LOSSES
NONMETALS
NUCLEONS
NUMERICAL DATA
PROJECTILES
PROTONS
RARE GASES
SCATTERING
SPACE DEPENDENCE