Microwave transient nutation measurements of relaxation in OCS and NH3

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

Research output: Contribution to journalArticle

25 Citations (Scopus)

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 - 1973
Externally publishedYes

Fingerprint

nutation
Microwave spectroscopy
Microwaves
microwaves
Relaxation time
relaxation time
inversions
collisions
spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

Microwave transient nutation measurements of relaxation in OCS and NH3. / Wang, J. H S; Levy, J. M.; Kukolich, Stephen G; Steinfeld, J. I.

In: Chemical Physics, Vol. 1, No. 2, 1973, p. 141-148.

Research output: Contribution to journalArticle

Wang, J. H S ; Levy, J. M. ; Kukolich, Stephen G ; Steinfeld, J. I. / Microwave transient nutation measurements of relaxation in OCS and NH3. In: Chemical Physics. 1973 ; Vol. 1, No. 2. pp. 141-148.
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