Microwave transient nutation measurements of relaxation in OCS and NH3

J. H.S. Wang, J. M. Levy, S. G. Kukolich, J. I. Steinfeld

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

The phenomenological Bloch equations are solved for transient nutation in optical two-level systems, using the Feynman-Vernon-Hellwarth representation. The resulting solutions display an exponentially damped oscillatory behavior, from which the relaxation times T1 and T2 may be derived. Transient nutation signals were observed using time-resolved microwave spectroscopy with rapid switching of applied Stark fields. Observed collision relaxation rates are (5.25 ± 0.50) MHz/torr for OCS-OCS, (1.96 ± 0.30) MHz/torr for OCS-He and (1.67 ± 0.20) MHz/torr for OCS-Ar. For NH3NH3 relaxation the rate is (23.2 ± 3.5) MHz/torr for the (8,7) inversion line.

Original languageEnglish (US)
Pages (from-to)141-148
Number of pages8
JournalChemical Physics
Volume1
Issue number2
DOIs
StatePublished - Jan 1 1973
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Microwave transient nutation measurements of relaxation in OCS and NH<sub>3</sub>'. Together they form a unique fingerprint.

  • Cite this