Low-Energy Electrons and Their Dynamical Correlation with Recoil Ions for Single Ionization of Helium by Fast, Heavy-Ion Impact

Journal Article · Mon Dec 19 00:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.3371· OSTI ID:6600950

Moshammer, R; Ullrich, J; Unverzagt, M; Schmidt, W; Jardin, P; Olson, R E; Mann, R; Doerner, R; Mergel, V; Buck, U; Schmidt-Boecking, H ^[1]

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1. Gesellschaft fuer Schwerionenforschung, m.b.H., Planckstrasse 1, D-64291 (Germany) Institut fuer Kernphysik, August-Euler-Strasse 6, D-60486 Frankfurt (Germany) Centre Interdisciplinaire de Recherches avec les Ions Lourds, Rue Claude Bloch PB 5133, 14040 Caen Cedex (France) Department of Physics, University of Missouri-Rolla, Rolla, Missouri 65401 (United States) Max-Planck-Institut fuer Stroemungsforschung, D-3400 Goettingen (Germany)

Helium single ionization by 3.6 meV/u Ni[sup 24+] impact was explored in a kinematically complete experiment by combining a high-resolution recoil-ion momentum spectrometer with a novel 4[pi] low-energy electron analyzer. More than 90% of the soft electrons'' ([ital E][sub [ital e]][approx lt]50 eV) are ejected in the forward direction in agreement with classical-trajectory Monte Carlo predictions. The electron longitudinal momentum is not balanced by the longitudinal momentum change of the projectile but mainly by the backwards recoiling He[sup 1+] ion. Energy losses of the 0.2 GeV projectiles as small as [Delta][ital E][sub [ital P]]/[ital E][sub [ital P]]=3.4[times]10[sup [minus]7] are observable.

• OSTI ID: 6600950
• Journal Information: Physical Review Letters; (United States), Vol. 73:25; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ION-ATOM COLLISIONS
ELECTRON EMISSION
NICKEL IONS
CROSS SECTIONS
ELECTRON CORRELATION
ELECTRONS
ENERGY LOSSES
EXPERIMENTAL DATA
GEV RANGE
HEAVY IONS
ION BEAMS
IONIZATION
LONGITUDINAL MOMENTUM
PROJECTILES
RECOILS
RESOLUTION
SPECTROMETERS
TARGETS
UNILAC
ACCELERATORS
ATOM COLLISIONS
BEAMS
CHARGED PARTICLES
COLLISIONS
CORRELATIONS
DATA
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
FERMIONS
FLUIDS
GASES
HEAVY ION ACCELERATORS
INFORMATION
ION COLLISIONS
IONS
LEPTONS
LINEAR ACCELERATORS
LINEAR MOMENTUM
LOSSES
MEASURING INSTRUMENTS
NONMETALS
NUMERICAL DATA
RARE GASES
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)