Polarization quantum beat spectroscopy of HCF(Ã 1 A″). I. 19F and 1H hyperfine structure and Zeeman effect

Haiyan Fan, Ionela Ionescu, Ju Xin, Scott A. Reid

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

To further investigate the 19F and 1H nuclear hyperfine structure and Zeeman effect in the simplest singlet carbene, HCF, we recorded polarization quantum beat spectra (QBS) of the pure bending levels 2 0 n with n = 0-7 and combination bands 1 0 12 0 n with n= 1-6 and 2 0 n3 0 1 with n= 0-3 in the HCF Ã 1A″ ← X̃ 1A′ system. The spectra were measured under jet-cooled conditions using a pulsed discharge source, both at zero field and under application of a weak magnetic field (aa and weak field Lande g aa factors. Consistent with a two-state model, the majority of observed vibrational levels exhibit a linear correlation of C aa and g aa, and our analysis yielded effective (ã) hyperfine constants for the 19F and 1H nuclei (in MHz) of 728(23) and 55(2), respectively. The latter was determined here owing to the high resolving power of QBS. The vibrational state selectivity of the 19F hyperfine constants is discussed, and we suggest that the underlying Renner-Teller interaction may play an important role.

Original languageEnglish
Pages (from-to)8869-8873
Number of pages5
JournalJournal of Chemical Physics
Volume121
Issue number18
DOIs
Publication statusPublished - Nov 8 2004
Externally publishedYes

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Zeeman effect
Optical resolving power
hyperfine structure
synchronism
Spectroscopy
Polarization
Magnetic fields
polarization
spectroscopy
carbenes
vibrational states
selectivity
nuclei
magnetic fields
carbene
interactions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Polarization quantum beat spectroscopy of HCF(Ã 1 A″). I. 19F and 1H hyperfine structure and Zeeman effect. / Fan, Haiyan; Ionescu, Ionela; Xin, Ju; Reid, Scott A.

In: Journal of Chemical Physics, Vol. 121, No. 18, 08.11.2004, p. 8869-8873.

Research output: Contribution to journalArticle

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AU - Ionescu, Ionela

AU - Xin, Ju

AU - Reid, Scott A.

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AB - To further investigate the 19F and 1H nuclear hyperfine structure and Zeeman effect in the simplest singlet carbene, HCF, we recorded polarization quantum beat spectra (QBS) of the pure bending levels 2 0 n with n = 0-7 and combination bands 1 0 12 0 n with n= 1-6 and 2 0 n3 0 1 with n= 0-3 in the HCF Ã 1A″ ← X̃ 1A′ system. The spectra were measured under jet-cooled conditions using a pulsed discharge source, both at zero field and under application of a weak magnetic field (aa and weak field Lande g aa factors. Consistent with a two-state model, the majority of observed vibrational levels exhibit a linear correlation of C aa and g aa, and our analysis yielded effective (ã) hyperfine constants for the 19F and 1H nuclei (in MHz) of 728(23) and 55(2), respectively. The latter was determined here owing to the high resolving power of QBS. The vibrational state selectivity of the 19F hyperfine constants is discussed, and we suggest that the underlying Renner-Teller interaction may play an important role.

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