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

Journal Article · Thu Nov 01 00:00:00 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]

---

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), Vol. 42:9; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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