Direct spectral evidence of single-axis rotation and ortho-hydrogen- assisted nuclear spin conversion of CH3 F in solid para-hydrogen

Yuan-Pern Lee*, Yu Jong Wu, Jon T. Hougen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Observation of two weak absorption lines from the E (K=1) level and one intense feature from A (K=0) for degenerate modes 4 and 6 of CH3 F provides direct spectral evidence that CH3 F isolated in p- H2 rotates about only its symmetry axis, and not about the other two axes. An interaction between A and E vibrational levels caused by the partially hindered spinning rotation is proposed. Conversion of nuclear spin between A and E components of CH3 F is rapid when p- H2 contains some o- H2, but becomes slow when the proportion of o- H2 is much decreased.

Original languageEnglish
Article number104502
JournalJournal of Chemical Physics
Volume129
Issue number10
DOIs
StatePublished - 19 Sep 2008

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