First-order theory for charge exchange with correct boundary conditions: General results for hydrogenlike and multielectron target atoms
The first Born approximation of Belkic-acute-accent, Gayet, and Salin (Phys. Rep. 56, 279 (1979)) with correct boundary conditions for charge exchange is thoroughly investigated. Functional analysis is used to derive general result T/sub n//sub l//sub m//sub ;//sub n//sub '//sub l//sub '//sub m//sub '//sup (1)/ of the transition amplitude for electron capture from hydrogenlike and multielectron atoms by bare nuclei. The basic matrix element is a two-center Dalitz integral with the logarithmic Coulomb phase factors, which has a broad spectrum of applications in both atomic and molecular physics. Multielectron target atoms are treated within an independent-particle model which goes beyond the customary procedure for scaled hydrogenlike wave functions. An accurate and efficient algorithm is encoded for both hydrogenic and Roothaan-Hartree-Fock orbitals into a single program for charge exchange between completely stripped ions and arbitrary atoms. An exemplary computation of the total cross sections is presently carried out for electron capture from all shells of Li by ..cap alpha.. particles in the energy range from 250 to 2500 keV. Good agreement is found with recent experimental data of McCullough et al. (J. Phys. B 15, 111 (1982)) and Sasao et al. (J. Phys. Soc. Jpn. 55, 102 (1986)).
- Research Organization:
- University of Southern California, Department of Chemistry, University Park, Los Angeles, California 90089-0482
- OSTI ID:
- 6056469
- Journal Information:
- Phys. Rev. A; (United States), Vol. 35:5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HELIUM IONS
ION-ATOM COLLISIONS
CHARGE EXCHANGE
LITHIUM
BORN APPROXIMATION
BOUNDARY CONDITIONS
COULOMB FIELD
KEV RANGE 100-1000
MANY-BODY PROBLEM
MEV RANGE 01-10
MULTICHARGED IONS
TOTAL CROSS SECTIONS
ALKALI METALS
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRIC FIELDS
ELEMENTS
ENERGY RANGE
ION COLLISIONS
IONS
KEV RANGE
METALS
MEV RANGE
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena