6533b7d7fe1ef96bd1268e1d

RESEARCH PRODUCT

Scintillation Measurements at Very High Solute Concentrations; Self Quenching-Structure Correlatios

subject

description

Abstract Measurements of the relative scintillation yields of some liquid organic systems were carried out with several highly soluble scintillator solutes. Self quenching was observed at high concentrations with some of the solutes, but not with others. The results were correlated with the ability of the solute molecules to come together, in a special configuration, close enough to form an association. A study of the atomic models of the solute molecules showed that those moleculeswith chromophor systems which were non-coplanar, or co-planar but shielded by substituent groups, did not produce self quenching. However, those solute molecules with unprotected co-planar chromophor systems did produce self quenching at high solute concentrations.