Coulomb deflection in ion-atom collisions

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.481· OSTI ID:5981022

Lapicki, G; Losonsky, W

The Coulomb-deflection factor, defined as the ratio of the Coulomb to plane-wave Born cross sections, is derived for slow but classically moving ions, and found to be in agreement with the data for K-shell ionization. When the half distance of closest approach in a head-on collision, d, is comparable to the important impact parameters (approx.1/q/sub 0/, where q/sub 0/ is the minimum momentum transfer), this factor simplifies to exp(-..pi..dq/sub 0/) as it has been employed in the inner-shell-ionization theory. When the impact parameters are small on the scale of the projectile de Broglie wavelength, as they are in nuclear phenomena, the Coulomb-deflection factor tends to exp(-2..pi..dq/sub 0/). An extension of our results to screened Coulomb repulsion gives good agreement with the semiclassical calculations and the data for K-shell excitation in Ne/sup +/-Ne collisions.

• Research Organization: Department of Physics, New York University, New York, New York 10003
• OSTI ID: 5981022
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:2; 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
CHARGED PARTICLES
COLLISIONS
COULOMB FIELD
ELECTRIC FIELDS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
K SHELL
NEON
NEON IONS
NONMETALS
RARE GASES