Accession Number : AD0766257

Title :   Vibrational Relaxation Measurements by a Combined Shock Tube-Laser Induced Fluorescence Technique.

Descriptive Note : Rept. for Apr-Dec 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Bott,Jerry F. ; Cohen,Norman

Report Date : 25 AUG 1973

Pagination or Media Count : 23

Abstract : Vibrational relaxation measurements in HF and DF have been obtained at intermediate temperatures by combining the laser-induced fluorescence technique with shock compression heating in a shock tube. The combination of the two techniques has several advantages: it permits measurements over a wide range of temperatures, and eliminates problems of wall reactions and leaky cells at high temperatures. This method was used to obtain HF and DF vibrational relaxation data in the presence of various chaperon molecules at temperatures from 460 to above 1000K and at room temperature. Data for the V-V energy transfer from DF to various diatomics were obtained from 295 to 700K and above. (Modified author abstract)

Descriptors :   (*FLUORIDES, RELAXATION TIME), (*DIATOMIC MOLECULES, RELAXATION TIME), MOLECULAR ENERGY LEVELS, FLUORESCENCE, SHOCK TUBES, HYDROGEN COMPOUNDS, DEUTERIUM COMPOUNDS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE