COLLISIONAL TRANSITION PROBABILITIES FOR VIBRATIONAL DEACTIVATION OF CHEMICALLY ACTIVATED SEC-BUTYL RADICALS. DIATOMIC AND POLYATOMIC MOLECULES
Abstract
The study of collisional transitional probabilities for the de- excitation by inert gases of chemically activated sec-butyl radicals, excited to internal energies in excess of 40 kcal/mole, was extended to H2, D2, N2, CO2, CH4, CD3F, CH3Cl and SF6. The diatomic gases display behavior similar to the rare gases, and on a preferred exponential model of collisional transition probabilities the average amount of energy transferred per collision is 1.3 kcal/mole. On a step-ladder model the corresponding amount is delta E = 2.5 kcal/mole. From higher pressure data, the efficiency for CD3F, CH3Cl and SF6 is deduced to be comparable with that for butene and on a preferred stepladder model, delta E > 9 kcal. For CO2 and CH4 the behavior is intermediate. The possible importance of the role of internal rotation of butyl in facilitating energy transfer is noted; some uncertainty exists concerning the role of over- all rotations and vibrational modes of the deactivator in the relaxation process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0296212
Entities
People
- B.s. Rabinovitch
- G.h. Kohlmaier
Organizations
- University of Washington