The rotational spectrum of the CH radical in its a sup 4. Sigma. minus state, studied by far-infrared laser magnetic resonance
- Physical Chemistry Laboratory, South Parks Road, Oxford, OX1 3QZ, England (GB)
- Time Frequency Division, National Institute of Standards Technology, Boulder, Colorado 80303 (USA)
The CH radical has been detected in its {ital a} {sup 4}{Sigma}{minus} state by the technique of laser magnetic resonance at far-infrared wavelengths. Spectra relating to different spin components of the first three rotational transitions have been recorded. The molecule was generated either by the reaction of F atoms with CH{sub 4}, with a trace of added oxygen or by the reaction of O atoms with C{sub 2}H{sub 2}. The observed resonances have been analyzed and fitted to determine the parameters of an effective Hamiltonian for a molecule in a {sup 4}{Sigma} state. The principal quantities determined are the rotational constant {ital B}{sub 0}=451 138.434(94) MHz and the spin--spin parameter {lambda}{sub 0}=2785.83(18) MHz. Proton hyperfine parameters have also been determined.
- OSTI ID:
- 6916841
- Journal Information:
- Journal of Chemical Physics; (USA), Vol. 92:7; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the radiative lifetime of the ([ital a] [sup 4][Sigma][sup [minus]],[ital v],[ital N],[ital F][sub [ital i]]) levels of the CH radical: An [ital ab] [ital initio] treatment
Theoretical and neon matrix electron spin resonance studies of the methanol cation: CH sub 3 OH sup + , CH sub 3 OD sup + , CH sub 2 DOH sup + , and sup 13 CH sub 3 OH sup +
Related Subjects
HYDROGEN
HYPERFINE STRUCTURE
METHYLENE RADICALS
INFRARED SPECTRA
ENERGY-LEVEL TRANSITIONS
LASER RADIATION
MAGNETIC RESONANCE
ROTATIONAL STATES
SPECTRAL FUNCTIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FUNCTIONS
NONMETALS
RADIATIONS
RADICALS
RESONANCE
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory