Application of the advanced adiabatic approach to charge exchange in slow collisions between H and O[sup 8+]

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.432· OSTI ID:6520376

Richter, K ^[1]; Solov'ev, E A ^[2]

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1. Fakultaet fuer Physik, Hermann-Herder-Strasse 3, 7800 Freiburg (Germany)
2. Department of Theoretical Physics, St. Petersburg University, St. Petersburg (Russian Federation)

We study charge exchange in slow atomic collisions within the framework of the advanced adiabatic approach [Grozdanov and Solov'ev, Phys. Rev. A 42, 2703 (1990)]. In this approach, nonadiabatic transitions near hidden or avoided crossings are related to branch points connecting adiabatic potential curves at complex values of the internuclear distance. A program package has been developed that automatically takes into account all relevant nonadiabatic transition amplitudes for the calculation of charge-transfer cross sections. The present method allows the inclusion of a large number of molecular-orbital basis functions and turns out to be extremely fast. As an example, partial and total cross sections are calculated for charge exchange in slow O[sup 8+]+H(1[ital s]) collisions. The results are compared to previous theoretical and experimental data.

• OSTI ID: 6520376
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ADIABATIC APPROXIMATION
ATOM COLLISIONS
CALCULATION METHODS
CHARGE TRANSPORT
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELEMENTS
HYDROGEN
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MOLECULAR ORBITAL METHOD
MULTICHARGED IONS
NONMETALS
OXYGEN IONS