Critical test of first-order theories for electron transfer in collisions between multicharged ions and atomic hydrogen: The boundary condition problem

Journal Article · Sat Aug 15 04:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.36.1601· OSTI ID:6459542

Belkic-acute-accent, D; Saini, S; Taylor, H S

We have thoroughly investigated electron capture from a hydrogen atom by bare nuclei at intermediate and high energies. The first Born approximation with and without correct boundary conditions is used to compute total cross sections. Both methods possess the same perturbation potential for the reaction under study. The only difference is in the logarithmic phase distortion of the exit channel state due to the long-range Coulomb interaction between the two aggregates. Evidence is presented which substantiates that these Coulomb phases for the relative motion of heavy particles are of paramount importance for an adequate description of charge exchange. The standard Jackson-Schiff approximation which does not consider the boundary condition problem fails completely in comparison with the measurement. In contrast, the first Born approximation with the correct boundary conditions, which takes the asymptotic Coulomb effect into full account, is found to be systematically in excellent agreement with the experimental data for values of the projectile charge ranging from 1 to 6.

• Research Organization: Institute of Physics, P.O. Box 57, 11001 Belgrade, Yugoslavia
• OSTI ID: 6459542
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 36:4; 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
BOUNDARY CONDITIONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
COULOMB FIELD
CROSS SECTIONS
ELECTRIC FIELDS
ELECTRON CAPTURE
ELEMENTS
HYDROGEN
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MULTICHARGED IONS
NONMETALS
SCREENING
TOTAL CROSS SECTIONS