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Nonresonant ionization detected IR spectroscopy for the vibrational study in a supersonic jet

✍ Scribed by Takuichiro Omi; Hiroshi Shitomi; Nobutake Sekiya; Ken Takazawa; Masaaki Fujii

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
527 KB
Volume
252
Category
Article
ISSN
0009-2614

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✦ Synopsis

A spectroscopic technique for the measurement of the IR transition in a supersonic jet has been develpped. This spectroscopy, the nonresonant ionization detected IR spectroscopy (NID-IR), detects the IR transition by selectiv~ ionization of the vibrationally excited molecule. Because of the ionization detection, it has high sensitivity. Furthermore, th~ ionization detection allows one to observe the IR spectrum of a specific molecular species by selecting the mass of the cogesponding cation. The advantage of NID-IR spectroscopy has been demonstrated by the observation of IR spectra )of phenol, o-fluorophenol, acetylene and 7-azaindole in a supersonic jet. The assignments of cis and trans rotational ]isomers in o-fluorophenol are also discussed.

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