Optogalvanic spectroscopy of quasi-resonant Penning ionization

R. Shuker, A. Ben-Amar, G. Erez

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Quasi-resonant Penning ionization in a Ne-Ca discharge is detected and studied by using the pulsed optogalvanic effect on the neon 1s i→2pj transitions. The ensuing signals exhibit extra features which appear at longer times following the signals obtained in pure neon discharge. A phenomenological model is used to describe the signal and to extract an estimate of the Penning cross section, which is on the order of 10-14 cm2. At high discharge currents the Penning contribution becomes unimportant and the related features in the optogalvanic signal disappear. A correlation between the dependence of the emission intensity of certain transitions of Ca and Ca+ related to the Penning effect and the dependence of the optogalvanic signal due to the Penning ionization on the discharge current is demonstrated. A similar correlation between the I-V characteristics and the dependence of the optogalvanic signal on the discharge current is also shown.

Original languageEnglish
Pages (from-to)5685-5690
Number of pages6
JournalJournal of Applied Physics
Volume54
Issue number10
DOIs
StatePublished - 1 Dec 1983

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