Absorption and emission line profile coefficients of multilevel atoms-III. Generalized atomic redistribution functions for three-photon processes

I. Hubeny, J. Oxenius

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

A previously published semiclassical formulation of the atomic line profile coefficients in terms of generalized redistribution functions is made more explicit by deriving atomic redistribution functions for three-photon processes. Quantum mechanical calculations are carried out for a general three-photon process corresponding to the atomic transition sequence i → j → k → f, for nondegenerate states i, j, k, f and within the framework of the impact approximation. For comparison, analogous calculations are also performed using the substate (Weisskopf-Woolley) picture. It is Found that the quantum mechanical and the substate forms of generalized redistribution functions agree in the limit of no collisions, whereas in the presence of collisions they agree only if level interface phenomena of the collisional line broadening are negligible. The physical assumption underlying the substate picture are discussed in detail.

Original languageEnglish (US)
Pages (from-to)65-80
Number of pages16
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume37
Issue number1
DOIs
StatePublished - Jan 1987

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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