Collisional energy transfer in highly vibrationally excited molecules. Summary report, June 1980-May 1981

Technical Report · Sun Mar 01 04:00:00 EST 1981

OSTI ID:5756096

Crim, F F

Combining the techniques of direct excitation of overtone vibrations and time resolved spectroscopic detection permits detailed measurements of the vibrational and rotational relaxation of highly vibrationally excited molecules. Using this technique, we have measured vibrational and rotational relaxation in HF(v = 3, 4, 5). By observing near-infrared fluorescence, we determine the self-relaxation probabilities for HF(v = 3, 4, 5) to be 0.19, 0.47, and 0.97, respectively, and find that the rates decrease more rapidly with temperature in these high levels than for v = 1. Using laser double resonance to probe individual rotational states, we find phenomenological rotational relaxation rate constants which decrease montonically with rotational energy change in the vibrationally excited molecule.

• Research Organization: Wisconsin Univ., Madison (USA). Dept. of Chemistry
• OSTI ID: 5756096
• Report Number(s): AD-A-096083/1
• Country of Publication: United States
• Language: English

Related Subjects

640305* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Theory-- (-1987)
74 ATOMIC AND MOLECULAR PHYSICS
DE-EXCITATION
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUORESCENCE
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LUMINESCENCE
MOLECULES
RELAXATION
ROTATIONAL STATES
TEMPERATURE DEPENDENCE
VIBRATIONAL STATES