Accession Number : AD0617988

Title :   SOME ASPECTS OF TRANSITIONS BETWEEN ELECTRONIC LEVELS,

Corporate Author : TEXAS UNIV AUSTIN DEPT OF CHEMISTRY

Personal Author(s) : Noyes,W. Albert ,Jr. ; unger,I.

Report Date : 1964

Pagination or Media Count : 14

Abstract : The transitions between electronic levels of polyatomic molecules and their relationship to the photochemistry of such molecules are considered. These transitions often occur without emission or absorption of radiation so that the state first formed by the absorption of radiation may not be the one most concerned with the resulting reaction kinetics. The present discussion reviews the data for a few polyatomic molecules, i.e., ketene, acetone, biacetyl, benzene, and ketones with C atoms to the carbonyl group, to determine both the extent of and the character of intersystem cross-overs and of internal conversions. The terms internal conversion and intersystem cross-over refer to a nonradiative transition between states of the same multiplicity and of different multiplicity, respectively. The scope of the subject is limited to the gas phase. (Author)

Descriptors :   (*ELECTRON TRANSITIONS, POLYATOMIC MOLECULES), GASES, INTERNAL CONVERSION, PHOTOCHEMICAL REACTIONS, KETENES, KETONES

Distribution Statement : APPROVED FOR PUBLIC RELEASE