Dependence of charge exchange cross sections on the charge of the incident ion

Journal Article · Thu May 01 04:00:00 EDT 1980 · Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States)

OSTI ID:6717625

Mueller, A; Shevel'ko, V P

The dependence of the total cross-section for single-electron charge exchange between multiply charged atomic ions on the charge Z of the incident ion is studied. The range of relative velocities v of the colliding particles from 2 x 10/sup 7/ cm/s to relativistic velocities has been investigated on the hypothesis that this dependence is described for a constant velocity by the power law sigmaapprox.Z/sup ..cap alpha../. It is shown that in the general case the index ..cap alpha.. is a function of the two variables v and Z. With increasing v the value of ..cap alpha.. increases from ..cap alpha..=1--2 up to the theoretical limit ..cap alpha..=5 resulting from the first Born approximation. At high velocities v>10/sup 8/ cm/s the so-called saturation effect occurs, that is, ..cap alpha.. increases with increasing Z up to the value ..cap alpha../sub max/< or =5 determined by the relation between v, Z, and the binding energy of the target atom, and then ..cap alpha.. decreases. For energies E>10 keV/a nucleon scaling law has been obtained for sigma and v, according to which the total charge exchange cross-section has a universal form, that is, for a fixed target, it depends only slightly on the charge and structure of the incident ion.

• Research Organization: P.N. Lebedev Physics Institute, Academy of Sciences of the USSR, Moscow
• OSTI ID: 6717625
• Journal Information: Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States), Journal Name: Sov. Phys. - Tech. Phys. (Engl. Transl.); (United States) Vol. 25:5; ISSN SPTPA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular &amp; Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC NUMBER
ATOMS
CHARGED PARTICLES
CHARGES
COLLISIONS
CROSS SECTIONS
ELECTRON EXCHANGE
ELECTRON TRANSFER
ENERGY RANGE
FUNCTIONS
ION COLLISIONS
ION-ION COLLISIONS
IONS
RELATIVISTIC RANGE
TOTAL CROSS SECTIONS
VELOCITY