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<< JRScience Home     Volume 14 No.1   June  2003     << Back to Volume Home

THE STUDY OF RADIATION DAMAGE TO THE CRYSTALS OF ALKALI HALIDES GROWN IN HOLES OF CARBON FILM 

Jan Muhammad

Department of Physics, Islamia University, Bahawalpur, Pakistan.

Email: drjan@scientist.com

Abstract: The study of the effect of electron irradiation to alkali halides crystals such as KCl, KBr, NaCl, CsI, CsCl, CsBr and CsF in electron microscope and defect-formation has been discussed. The weak irradiation produced dislocation loops, while intense beam produced cavities. In some crystals electron irradiation causes granularities on the surface of the base crystal. The division of single crystal into several small crystals, oriented randomly, is also observed. The mechanism of formation of these defects has been discussed.

 

Keywords: Cavities, defect in crystals, dislocation loops, electron irradiation, fiber-like structure, granularities.