Accession Number : AD0410781

Title :   TRIPLET EXCITATION INDUCED BY ELECTRON IRRADIATION.

Descriptive Note : Final rept. 1 Dec 61-30 Nov 62,

Corporate Author : AMERICAN OIL CO WHITING IND

Personal Author(s) : McCollum,J.D. ; Nevitt,T.D.

Report Date : APR 1963

Pagination or Media Count : 38

Abstract : Triplet excitation of aromatic solutes induced by pulsed electron irradiation arises by inter system crossing from irradiation produced sing let excited states. Intersystem crossing ef ficiencies for anthracene, 0.15, and for naphthalene, 0.6, are equivalent to values of 0.13 and 0.7 in photochemical systems. Processes unique to radio-excitation for triplet formation produce little or no triplet excitation. The ratio, Po, of specific rates vent-solute transfer of excitation energy to solvent de gradation of energy were evaluated from absolute yields of excited singlet solutes. For 9 methylanthracent, Po was 2200; for anthracene, 1600; for naphthalene, 140. Additives which give radiation protection can be evaluated by similar measurements. (Author)

Descriptors :   (*SOLUTIONS(MIXTURES), RADIOACTIVITY), (*SPECTROSCOPY, MEASUREMENT), SOLVENTS, EXCITATION, ADDITIVES, AROMATIC COMPOUNDS, ORGANIC COMPOUNDS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE