Electron exchange scattering from a hydrogenlike atom at high impact velocities

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.18.2047· OSTI ID:6853637

Shakeshaft, R

I examine the exchange scattering of an electron from a hydrogenlike atom in the high-energy limit. Although I use the word ''electron,'' the discussion is not restricted to interactions that are pure Coulombic, and the emphasis is on the determination and interpretation of the dominant mechanisms for exchange. I find, in agreement with earlier conclusions, that the second Born term is, except in special circumstances, more important than the first Born term. I present the results of calculations of the differential cross sections for 1s ..-->.. 1s and 1s ..-->.. 2s exchange scattering of an electron from a hydrogen atom at impact energies of 500 eV and 1 keV; these results illustrate the degree to which the second Born term dominates over the first. At zero scattering angle, the differential cross section for 1s ..-->.. 2s exchange is found to be two orders of magnitude larger when calculated within the second Born approximation rather than within the first Born (Ochkur) approximation.

• Research Organization: Physics Department, Texas AandM University, College Station, Texas 77843
• OSTI ID: 6853637
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:5; 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
BORN APPROXIMATION
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 100-1000
FLUIDS
HYDROGEN
NONMETALS