Accession Number : AD0274467

Title :   MECHANISMS FOR VIBRATIONAL RELAXATION AT HIGH TEMPERATURES

Corporate Author : CORNELL UNIV ITHACA N Y

Personal Author(s) : BAUER,S.H. ; TSANG,S.C.

Report Date : APR 1962

Pagination or Media Count : 1

Abstract : Attention is called to several mechanisms which effectively couple translational and vibrational motions through the intermediary of chemical reactions. It was proposed that these processes lead to shorter relaxation times than those expected from direct energy exchange via inelastic collisions. Semiquantitative estimates were made, and relaxation times for these different processes were compared as a function of the reciprocal temperatures. At high temperatures, it was proposed that the transfer of energy from rotations to vibrations at approximately constant total energy could be induced by distant collisions. These serve only to balance the change in rotational angular momentum. Such events provide alternate paths for rapid vibrational relaxation, particularly for the upper vibrational levels, and may account for the discrepancy between the observed and calculated rates of dissociation. (Author)

Descriptors :   *DISSOCIATION, *GASES, *IONIZATION, *REACTION KINETICS, ATMOSPHERE ENTRY, ATOMIC ENERGY LEVELS, ENERGY, EXCITATION, HIGH TEMPERATURE, IONS, MOLECULAR ROTATION, MOLECULES, RECOMBINATION REACTIONS, RELAXATION TIME, SHOCK WAVES, THEORY, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE