Theoretical study of population sharing between n=2 levels in the Li++He collision

Wahnón Benarroch, Perla and Gala, S. and Diro, M. C. and Courbin-Gaussorgues, C. and Sidis, V. (1986). Theoretical study of population sharing between n=2 levels in the Li++He collision. "Journal of Physics B: Atomic and Molecular Physics", v. 19 (n. 5); pp. 611-628. ISSN 0022-3700. https://doi.org/10.1088/0022-3700/19/5/020.

Description

Title: Theoretical study of population sharing between n=2 levels in the Li++He collision
Author/s:
  • Wahnón Benarroch, Perla
  • Gala, S.
  • Diro, M. C.
  • Courbin-Gaussorgues, C.
  • Sidis, V.
Item Type: Article
Título de Revista/Publicación: Journal of Physics B: Atomic and Molecular Physics
Date: 1986
ISSN: 0022-3700
Volume: 19
Subjects:
Freetext Keywords: Theoretical study; relative populations; Li++He collisions; half-collision model
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica y Bioingeniería
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Presents a theoretical study of the relative populations of Sigma and Pi states associated with Li*(n=2)+He+ and Li++He*(n=2) products that are formed in Li++He collisions at keV energies. A half-collision model is considered where the (1s sigma 22p sigma 2p pi ) 1 Pi molecular state is assumed to be prepared initially (as a result of a primary 2p sigma -2p pi rotational coupling step) and the population-sharing processes occur as the collisional system breaks apart. The corresponding calculations involve six-state and twelve-state atomic-like diabatic representations and are carried out using the impact parameter method. the differential electron capture probability and the Stokes' parameters for Li*(22P) and He*(21P) excitations are determined. The calculated alignment angles gamma (Li,He) and shape parameters are slowly oscillating functions of the collision energy. The differences between the results for Li and He are discussed in terms of the various electron transition mechanisms. Qualitative agreement between theory and experiment is found for gamma (Li) but the comparison for gamma (He) is disappointing.

More information

Item ID: 61145
DC Identifier: http://oa.upm.es/61145/
OAI Identifier: oai:oa.upm.es:61145
DOI: 10.1088/0022-3700/19/5/020
Deposited by: Biblioteca ETSI Telecomunicación
Deposited on: 17 Mar 2020 10:40
Last Modified: 17 Mar 2020 12:15
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