Energy Transfer in A 2 Sigma (+) OH II. Vibrational.
Abstract
Vibrational energy transfer within the A state of OH and OD has been studied. A frequency doubled tunable dye laser excites individual N', J' levels in v'=1 or 2, and the intensities of rotationally resolved fluorescence emitted in the presence of collision partners (helium, argon hydrogen, deuterium and nitrogen) furnishes state-to-state transfer rates. It is found that the transfer rates are strongly dependent on initial rotational level (decreasing as the rotational quantum number increases), that the final rotational state distributions are near thermal but hot, that isoenergetic transfer is small, and that the magnitudes for transfer 1 to 0, 2 to 0 are all similar. The rates themselves are large; for example, with nitrogen the cross section for 1 to 0 transfer with N=3 is 21 square Angstrom. The results taken together, are supportive of a long-lived collision in which anisotropic attractive forces are of importance in the dynamics of the entrance channel. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA064098
Entities
People
- David R. Crosley
- Russell K. Lengel
Organizations
- Ballistic Research Laboratory