Observations of Phosphorescence in Plastic Scintillators Excited by 60Co γ Irradiation

The γ-induced luminescence of chrysene-d12, coronene-d12, and p-terphenyl has been studied in plastic hosts (DER-332 and polymethylmethacrylate). Both phosphorescence and fluorescence are observed. The variation of phosphorescence and fluorescence as a function of solute concentration is determined....

Full description

Saved in:
Bibliographic Details
Published in:The Journal of chemical physics 1967-11, Vol.47 (9), p.3340-3347
Main Author: Kropp, John L.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The γ-induced luminescence of chrysene-d12, coronene-d12, and p-terphenyl has been studied in plastic hosts (DER-332 and polymethylmethacrylate). Both phosphorescence and fluorescence are observed. The variation of phosphorescence and fluorescence as a function of solute concentration is determined. From the concentration dependence, Q parameters can be calculated for the phosphorescence (QP) and fluorescence (QF) of the compounds studied. The ratio of phosphorescence to fluorescence under γ irradiation (Rγ) is compared to that observed under uv irradiation (Ruv) and a kinetic scheme is developed that relates (Rγ/Ruv) to QP and QF assuming only excitation transfer. From the fit of the kinetic treatment to the experimental points, it is concluded that triplet coronene-d12 is formed mainly via excited solvent triplets. Triplet p-terphenyl is not formed via excited solvent but is formed by other processes probably involving ions.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1712396