MEASUREMENT AND ANALYSIS OF THE RAMAN INTENSITIES OF (CD4)-C-12

The stimulated Raman spectrum of (CD4)-C-12 was recorded at high resol ution, in the spectral range 1963 to 2260 cm(-1). Intensities of the r ovibrational transitions were estimated by fitting the line profiles. The recorded elementary spectrum was 1 cm(-1) wide; all recordings wer e then intensity calibrated. Afterward, the relative Raman intensities were analyzed by using a polarizability model developed previously [A . Boutahar and M. Loete, Can. J. Phys. 69, 26-35 (1991); J. P. Champio n, M. Loete, and G. Pierre, in ''Spectroscopy of the Earth's Atmospher e and Interstellar Molecules'' (K. Narahari Rao and A. Weber, Eds.), p p. 388-397, Academic Press, Boston. 1992]. The investigated region has five interacting bands(upsilon(1), upsilon(3), 2 upsilon(2), upsilon( 2) + upsilon(4), and 2 upsilon(4)) and they were analyzed simultaneous ly. Experimental data enabled retrieval of six polarizability paramete rs. The agreement between calculated and measured intensities is withi n about 12%. To confirm the results, some calculations were made of ot her spectra, recorded using spontaneous or stimulated Raman techniques . (C) 1995 Academic Press, Inc.