Accession Number : AD0738488

Title :   Molecular Spectroscopy and Brillouin Scattering.

Descriptive Note : Technical rept. 1 Mar 71-29 Feb 72,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF PHYSICS

Personal Author(s) : Rank,D. H.

Report Date : 29 FEB 1972

Pagination or Media Count : 111

Abstract : The report consists of a series of three papers on high resolution infrared spectroscopy and two papers on Brillouin scattering. The first three discuss the rotational structure observed in the spectrum of the dimer of HF and comments on the structure of (HF)2. For acetylene two papers gove the results of extensive work on the molecular constants with particular emphasis on the bending modes with new data from the 5 micrometers region. The papers on Brillouin scattering review the pre-laser status of this scattering and present new information on sound speeds, breakdown, stikulated gain and the phonon lifetime in the plastics polymethylmethacrylate and polyethylmethacrylate. (Author)

Descriptors :   (*INFRARED SPECTRA, SCIENTIFIC RESEARCH), (*FLUORIDES, INFRARED SPECTRA), (*ALKYNES, INFRARED SPECTRA), (*PLASTICS, SCATTERING), INFRARED RADIATION, LIQUIDS, SCATTERING, MOLECULAR ENERGY LEVELS, VIBRATION, PHONONS, LASERS, RELAXATION TIME, POLARIZATION, REPORTS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE