Open AccessTHE OPTOTHERMAL SPECTRA OF INFRARED MULTIPHOTON ABSORPTION OF CF3CDCl2
Author(s) -
Zhengmin Wang,
Yang Li-Shu,
Zongcai Liu,
Wu Chuang-Xiu
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.670
Subject(s) - infrared , absorption (acoustics) , absorption spectroscopy , materials science , excited state , infrared spectroscopy , deuterium , atomic physics , wavelength , spectral line , laser , optics , analytical chemistry (journal) , molecular physics , physics , chemistry , optoelectronics , astronomy , chromatography , quantum mechanics
The optothermal spectrum of infrared MPA of CF3CDC12 obtained by using optothermal cell with a platinum filament as a detector is reported here. It is found that the absorption peak at 944 cm-1 in infrared linear absorption spectrum splits into two peaks at 947 cm-1 and 927cm-1 in MPA spectrum. This phenomenon could be related to-the coupling of normal vibrations produced by Coriolis forces and anharmonisity. So one could select a more suitable excited wavelength according to this new result in laser separation of deuterium isotop. The absoption peak at 986 cm-1 in infrared linear absorption spectrum shows a red shift of 6cm-1 in MPA spectrum. This is due to the anhamonicity of vibrational levels of the molecule.