LOW TEMPERATURE PHOSPHORESCENCE OF LOW DENSITY POLYETHYLENE INDUCED BY FAST ELECTRONS

摘要

Phosphorescence of low density polyethylene induced by 6 MeV electrons was observed in the temperature region 10-285 K. Decay of phosphorescence at temperatures below γ -relaxation region follows monoexponential equation. Above this transition, for T ≥ 169 K kinetics can be described by two term relation. At low temperatures phosphorescence life time τ_T is temperature independent while at higher ones τ_T exhibits strong temperatures dependence. Time resolved emission, spectrum at T = 20 K is presented. Tentative conclusions are postulated.