Temperature dependency of radiation damage in inorganic materials by 300 keV electrons

Temperature dependency of radiation damage in albite and natrolite was stud ied quantitatively by measuring the diffraction intensity with imaging plat es. Radiation damage was reduced at low temperature in albite but was enhan ced in natrolite. A damage process model, in which creation and annihilatio n of localized defects were considered, was proposed. According to this mod el, Boltzmann factor in temperature dependency is dominated by a difference between energy for diffusion of the localized defects and energy for break down of a crystal framework. When the diffusion energy is larger than break down energy, the activation energy in Boltzmann factor seems to be effectiv ely negative.