Kinetics of He(2S1) using resonance ionization spectroscopy

M. G. Payne, G. S. Hurst, M. H. Nayfeh, J. P. Judish, C. H. Chen, E. B. Wagner, J. P. Young

Research output: Contribution to journalArticlepeer-review


We have demonstrated that quantum selected populations of He(2S1) can be converted completely to ionization by single-photon excitation to He(3P1) followed by collision-induced associative ionization. For helium pressures between 15 and 100 Torr, saturation of ionization was observed whenever a tunable dye laser produced more than 0.1 J/pulse. Absolute numbers of He(2S1) per ion pair formed from proton interaction and the decay rates of He(2S1) support a recent energy-pathways model.

Original languageEnglish (US)
Pages (from-to)1154-1156
Number of pages3
JournalPhysical review letters
Issue number17
StatePublished - 1975
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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