Accession Number : AD0745953

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

Descriptive Note : Rept. for Jun-Dec 71,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Bott,Jerry F.

Report Date : 19 JUN 1972

Pagination or Media Count : 32

Abstract : Vibrational relaxation measurements in HF have been obtained in at intermediate temperatures by combining the laser-induced fluorescence technique with shock compression hearing in a shock tube. Usually, shock tube measurements of vibrational relation are limited to high temperatures, above about 1300K in the case of HF. Laser-induced fluoresence measurements can be made in heated cells suitable for HF handling up to about 700 to 800K. The combination of the two techniques offers several advantages including large range of temperatures, no wall reactions, and no leaky cells at high temperature. This method was used to obtain HF vibrational relaxation data at 460 to 1030K. These data, together with shock tube data at high temperature (1350 to 3000K), are compared with theoretical predictions. (Author)

Descriptors :   (*FLUORIDES, *ELECTRON TRANSITIONS), RELAXATION TIME, FLUORESCENCE, RESONANCE ABSORPTION, SHOCK TUBES, VIBRATION, MOLECULAR ENERGY LEVELS, LASERS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE