Level-Crossing Resonances in Nuclear Spin Conversion of Molecules

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.4732· OSTI ID:399877

Nagels, B; Calas, N; Roozemond, D; Hermans, L; Chapovsky, P ^[1]

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1. Huygens Laboratory, Leidens University, P.O. Box 9504, 2300 RA Leiden (The Netherlands)

The first observation of level-crossing resonances in ortho-para conversion is presented. A sharp increase in the conversion rate of gaseous {sup 13}CH{sub 3}F is observed when an applied electricfield produces crossing of molecular ortho and para levels. The experimental results are described well by the spin conversion theory based on intramolecular ortho-para state mixing. The results provide direct identification of the levels being mixed and the interaction responsible. The observed spectrum may be considered as an example of Doppler-free spectroscopy. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 399877
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CONVERSION
CROSSING-OVER
ENERGY LEVELS
GASES
METHYL FLUORIDE
MIXING
RESONANCE
SPECTRA
SPIN