Atomic Collision Parameters for Electron De-Excitation of the 4S-3P Transition of Sodium

Abstract

A comparison of measured Stokes parameters and atomic collision parameters (Plin, γ, L⊥, P+) is made for the excitation and de-excitation of the 3S-3P and 4S-3P transitions of Na respectively, for electrons with incident energies of 22, 30 and 50 eV. These parameters are obtained from 'time-inverse' experiments in which electrons are either superelastically (3P-3S) or inelastically (3P-4S) scattered from the laser prepared 3P state. The data are compared with calculations from a convergent close coupling (CCC) model and a second-order distorted wave Born (DWB2) model. Both models demonstrate very good agreement for 3S-3P transitions. For the 4S-3P transitions, the DWB2 is in better accord with experiment than the CCC for the Plin parameter, the CCC is in excellent agreement with experiment for γ and L⊥, and neither is in accord with experiment for P+.

Department(s)

Physics

Keywords and Phrases

Electron energy levels; Electron scattering; Electron transitions; Electrons; Laser applications; Mathematical models; Molecular dynamics; Atomic collision parameters; Convergent close coupling model; Second order distorted wave born; Stokes parameters; Sodium

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1999 IOP, Bristol, United Kingdom, All rights reserved.

Publication Date

01 May 1999

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