A determination of the spin-rotation parameters for NO2 in the X̃2A1 state by microwave-optical double resonance

J. M. Brown, T. C. Steimle, M. E. Coles, R. F. Curl

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

Magnetic dipole transitions between the spin components of rotational levels of NO2 in its ground state have been observed by the technique of microwave-optical double resonance. Fluorescence induced by an argon ion laser was used to monitor the process. Observations were made in the range 4 to 12 GHz and provide information on levels with a wide spread of N and K a values. The results have been used in conjunction with the known electric dipole transition frequencies and some recent data from radio frequency-infrared double resonance to determine the rotational and spin-rotational parameters for the molecule in its ground state. It has proved possible to determine all the three quadratic and six quartic parameters in the spin-rotational Hamiltonian. The improvement in knowledge of the spin-rotation intervals allow a refinement of the Zeeman parameters for NO2 by refitting the data from the EPR and LMR spectra. The results are in good agreement with the relationships gSaa=g saa/2Baa, etc.

Original languageEnglish (US)
Pages (from-to)3668-3672
Number of pages5
JournalThe Journal of chemical physics
Volume74
Issue number7
DOIs
StatePublished - Jan 1 1981
Externally publishedYes

ASJC Scopus subject areas

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

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