Accession Number:

ADA172250

Title:

Vibrational Relaxation Rates and Pathways in Highly Excited Molecules.

Descriptive Note:

Final rept. 30 Jun 82-29 Jun 85,

Corporate Author:

WISCONSIN UNIV-MADISON DEPT OF CHEMISTRY

Personal Author(s):

• Crim,F. F.

Report Date:

1985-12-10

Pagination or Media Count:

9.0

Abstract:

The techniques of laser double resonance or near-infrared fluorescence detection in combination with direct excitation of overtone vibrations provide detailed data on the rates and pathways of collisional energy transfer in hydrogen fluoride and deuterium fluoride. These measurements yield the self-relaxation rate constants for HFv1,2,3,4,5 and DFv1,2. In addition, they determine the relative importance of the vibration-vibration and vibration-translation, rotation energy transfer pathways for v or 2 in both molecules. Applying these techniques at higher temperatures gives the self-relaxation rate constants between 300 and 700 K for HFv1-5. Using different partners permits the determination of the rate constants for collisional relaxation of HFv3,4,5 by H2, D2, CH4, CD4, and C02.

Descriptors:

• *ENERGY TRANSFER
• *PARTICLE COLLISIONS
• *CHEMICAL LASERS
• *ISOTOPE EFFECT
• *HYDROGEN FLUORIDE
• DETECTION
• FLUORESCENCE
• MOLECULAR VIBRATION
• MOLECULES
• HIGH TEMPERATURE
• EXCITATION
• RATES
• LASERS
• RESONANCE
• RELAXATION
• RELAXATION TIME
• DATA RATE
• ROTATION
• FLUORIDES
• NEAR INFRARED RADIATION
• DEUTERIUM COMPOUNDS
• ELECTRON NUCLEAR DOUBLE RESONANCE

Subject Categories:

• Lasers and Masers
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE