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

Journal Article · · Physical Review Letters; (United States)
; ; ; ; ; ; ; ; ; ;  [1]
  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)
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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), Journal Name: Physical Review Letters; (United States) Vol. 73:25; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

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