Mechanismus der Photonenemission bei mechanischer Anregung von Alkalihalogenidkristallen

Abstract

A model1 for the mechanism of emission is proposed, to discuss experimental investigation of the photon emission of mechanically treated alkali halide crystals. The model is based on the decay of self trapped excitons and it allows the discussion of additional physical effects, caused by mechanical excitation.

Explosive Molecular Ionic Crystals

“…Let us suppose that such mechanical working has somehow given rise to be a population of excitons (11,17). By virtue of a lattice instability detailed below, the neutral N3 (or CNO, or other X) playing the role of hole is propelled directly into impact with a neighboring N3-(or other X-).…”

“…In alkali halides, Linke and co-workers demonstrated mechanoluminescence in the exciton bands, and other evidence ofmechanically induced excited states (11). In much earlier studies of NaCl, KCI, and CsI, Belyaev and Martyshev (12) found that fracture of crystals gives rise to various electrical phenomena, including optical and radio emission.…”

“…At separating surfaces, facing patches of opposite sign are formed (11). This sets up an electric field independent of separation until the distance approaches the patch diameter.…”