Isothermal luminescence of γ-irradiated 3-methylpentane containing two solutes at 77 K

Abstract

A 3-methylpentane glass containing a pair of solutes was γ-irradiated at 77 K and the isothermal luminescence was measured. Two pairs of solutes were examined: naphthalene-9,10-diphenylanthracene and toluene-naphthalene. For constant concentration of left-hand solutes ( S1) the concentration of right-hand solutes ( S2) was changed. When the S2 concentration increases, the luminescence intensities measured at the emission bands of S2 increase. The results can be explained in terms of a tunnelling charge transfer model and a competitive charge capture scheme.