Abstract
The isothermal luminescence of γ-irradiated frozen 3-methylpentane (3MP)-methylcyclohexane (MCH) mixtures (3MP mole fraction from 0 to 0.96) containing naphthalene (Nph) was investigated at 77K. At high Nph concentration (2.5 x 10 −2mol dm −>3) the luminescence is due to molecular ion recombination by tunnelling. In the soft glass (0.96 mole fraction 3MP) at low Nph concentration (10 -3 mol dm -3) electron thermal detrapping seems to contribute to the emission. The experimental decay curves were interpreted based on the Bagdasar'yan relation as well as the continuous-time- random-walk formalism (assuming a first-order rate equation with a time dependent rate constant of the form k( t) = B t ( α−1) .
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