Spectroscopy research at the McLennan physical laboratories of the University of Toronto.

Recent research of the Spectroscopy and Molecular Physics Research Group at the Department of Physics, University of Toronto, has been in the general areas: spectroscopy of compressed gases, low temperature spectroscopy, Raman spectra of low pressure gases, optical pumping, applications of lasers to light scattering, and interference spectroscopy in the laboratory and from high altitude balloons. Topics discussed in some detail in this communication are: bound states of hydrogen-foreign gas Van der Waals complexes, intensity anomalies in the Raman effect of solid hydrogen, pressure broadening in the Raman spectra of simple diatomic molecules, a synopsis of work on high resolution rotation and rotation-vibrational Raman spectra of gases, recent results on Brillouin scattering and Raman line widths using lasers, and collision broadening in the spectrum of zinc by optical pumping.