Triboluminescence of Some Alkali Halide Crystals

Abstract

A photoelectric method for the registration of the triboluminescence spectra is described. Using this method the triboluminescence spectra of LiF crystals at destruction in air, vacuum, and in an argon atmosphere are obtained. The experimental study of triboluminescence of some alkali halide crystals have been carried out under the simultaneous control of the deformation and fracture processes, surface electrization, and electromagnetic radiation in the radio range. The correlation between the nature of these processes and the light emission is established.AaHo onmcaHHe @ o~o a n e~~p a u e c~o r o

Triboluminescence: Recalling Interest and New Aspects

“…TL was found to be produced from the fracture of some alkali halides, such as LiF, NaF, NaCl, KCl, CsI, etc., and the mechanism was attributed to the electric discharge of nitrogen. 66 The more interesting part was that intense emission in the visible region was observed in alkali halide crystals pretreated by either X-or g-ray irradiation. This emission occurred during their fracture as well as during elastic and plastic deformation.…”

Survey of the literature on mechanoluminescence from 1605 to 2013

“…In the 17th century, only five papers were published on ML ; in the 18th century, 15 papers were published ; in the 19th century, 19 papers were published ; in the 20th century, ~ 372 papers were published …”

Excitation of triboluminescence by deformation of single crystals

“…I n earlier works [4, 5, 61 it has been found that TL shows a fluorescence spectrum superposed to a band spectrum due to electric discharges in the surrounding atmosphere. A recent detailed work [7] reports the same result for LiF: the mechanical action is followed by a fluorescencc analogous to that induced by Xor UV rays and, under particular conditions, by electric discharges. Which phenomenon prevails depends on the substance investigated, on the imbedding medium, and on the type of the mechanical action.…”