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Difference Frequency Spectroscopy of Methyl Iodide12CHD2I in the Ground and ν1Vibrational States

✍ Scribed by C.J. Hodges; R.J. Butcher

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
212 KB
Volume
178
Category
Article
ISSN
0022-2852

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✦ Synopsis

This paper presents a study of the 3-mm spectrum of 12 CHD 2 I which has been obtained using a difference frequency laser spectrometer. This instrument generates a few tens of microwatts of infrared radiation with an estimated linewidth of 5 MHz. In conjunction with a long absorption cell the apparatus allows the acquisition of a Doppler-limited spectrum for this molecule. Analysis of its rotational structure has yielded accurate ground-state constants for the first time. The analysis was based on the S-type asymmetric rotor Hamiltonian derived by Watson and included centrifugal distortion terms up to sextic.

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