Single- and double-electron loss from helium by collisions with v> or =v/sub 0/ multiply charged ions

Journal Article · Sat Nov 01 04:00:00 EST 1980 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.22.1930· OSTI ID:6805106

Hvelplund, P; Haugen, H K; Knudsen, H

Cross sections for single- and double-electron loss (electron capture plus impact ionization) for H/sup +/, He/sup q/+, O/sup q/+, and Au/sup q/+ incident on helium have been measured at velocities from approx.v/sub 0/ to approx.10v/sub 0/. The charge state q was varied from 1 to 21, depending on velocity and projectile. The energy and charge-state dependence of the single-loss cross section at the lower velocities is reasonably well described by the model of Olson based on Coulomb interaction between particles and classical trajectory Monte Carlo calculations. The results for H/sup +/, He/sup +/, and He/sup + +/ at high velocities are in good agreement with earlier experimental values of Pivovar et al. and with Bethe-Born calculations of Gillespie. The double-loss cross section, which for highly charged projectiles amounts to as much as 60% of the single loss, is found to behave quite differently from the single-loss cross section, both as a function of incident charge and velocity. While single-loss cross sections at velocities between v/sub 0/ and 2v/sub 0/ are almost independent of energy and proportional to q, the double-loss cross sections are approximately proportional to energy and to q/sup 2/.

• Research Organization: Institute of Physics, University of Aarhus, DK-8000 Aarhus C, Denmark
• OSTI ID: 6805106
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 22:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON CAPTURE
ELECTRON LOSS
ELEMENTS
ENERGY DEPENDENCE
EXPERIMENTAL DATA
FLUIDS
GASES
GOLD IONS
HELIUM
HELIUM IONS
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
NONMETALS
NUMERICAL DATA
OXYGEN IONS
RARE GASES