State-selective capture in collisions between ions and ground- and excited-state alkali-metal atoms

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.42.5305· OSTI ID:5829084

Pascale, J ^[1]; Olson, R E; Reinhold, C O ^[2]

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1. Service de Physique des Atomes et des Surfaces, Centre d'Etudes Nucleaires de Saclay, 91191 Gif-sur-Yvette CEDEX (France)
2. Department of Physics, University of Missouri-Rolla, Rolla, MO (USA)

Total cross sections for state-selective electron capture in collisions between ions and alkali-metal atoms have been calculated by means of a three-body classical-trajectory Monte Carlo (CTMC) method using model potentials to describe the electron--ionic-core interactions. Calculations have been performed for Na{sup +}-Na(28{ital d}) collisions and for N{sup 5+} and Ar{sup 8+}-Cs(6{ital s}) collisions. The collision velocity range corresponds to 0.5{approx lt}{ital v}{sub {ital p}}/{ital v}{sub {ital e}}{approx lt}2, where {ital v}{sub {ital p}} is the projectile velocity in the laboratory frame and {ital v}{sub {ital e}} is the initial orbital velocity of the electron bound to the alkali-metal core. In the case of Na{sup +}+Na(28{ital d}) collisions, calculations of the final {ital n},{ital l},{ital m} distributions show the importance of the electron-capture cross sections into states with {ital m}{gt}1. For the case of multiply charged ion--Cs(6{ital s}) collisions, a predominance of electron capture to nearly circular states (large {ital l} values) is predicted for cross sections near the maximum of the {ital n} distribution. When the {ital e}{sup {minus}}-Cs{sup +} interaction is described by a realistic model potential, the CTMC calculations are found to be in good agreement with recent measurements of the final {ital n} values that are predominantly populated after single-electron capture.

• OSTI ID: 5829084
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 42:9; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ARGON IONS
ATOM COLLISIONS
CAPTURE
CESIUM
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
EXCITED STATES
GROUND STATES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MANY-BODY PROBLEM
METALS
MULTICHARGED IONS
NITROGEN IONS
SODIUM
THREE-BODY PROBLEM
TOTAL CROSS SECTIONS