Self-broadened widths of '%iH, in the v1 @branch have been measured at room temperature (295 K) using high-resolution stimulated Raman spectroscopy. These collisional widths have been obtained by fitting a superposition of Voigt profiles to the experimental spectra in the pressure range 28-154 Torr. No evidence for line mixing within the tetrahedral components of a Q(J) line has been found. The l i e broadening coefficients for J up to 13 depend weakly on the rotational quantum number. The mean value is 103.7 x cm-' atm-'.
Nous prksentons un modble de la polarisabilitC cohCrent avec celui de 1'Hamiltonien pour les molCcules tCtraCdriques XY,.Les opCrateurs de la polarisabilitC sont obtenus par couplage dans le groupe Td. 11s sont donnCs i tout ordre d'approximation pour toutes les bandes de vibration-rotation quelle que soit leur symCtrie pour des schCmas polyade ou bande isolCe. Nous obtenons une formule unique pour I'ClCment matriciel de ces opCrateurs. Nous donnons l'expression de llintensitC Raman d'une transition dans ce formalisme.A new model of polarizability is presented consistent with the Hamiltonian of tetrahedral molecules XY,. Using a coupling scheme in the Td group, polarizability operators are obtained up to any order of approximation for all vibration-rotation bands of any symmetry. This model leads to an unique formula for matrix elements of these operators. We also give the general expression for the Raman intensity of a transition.Can. J. Phys. 69, 26 (1991)
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.