Luminescence of coals excited by a pulsed electron beam

Abstract

The paper presents the spectral and kinetic characteristics of the glow of coals from the Kuznetsk basin: brown, long-flame gaseous, gaseous and coke when excited by a pulsed electron beam (240 keV, 25 ns, 20 J/cm2). The glow that occurs in coals as a result of exposure at a temperature of T = 300 K has a luminescent character. The glow intensity increases in 50–100 ns with a subsequent decrease in ≈500 ns. The luminescence spectra of coals are presented at the moment of reaching the maximum luminescence intensity. Against the background of broadband luminescence, a number of narrow bands associated with the luminescence of polycyclic aromatic hydrocarbons are observed in all coals.