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The radiation production of F centers in Fe-doped and "pure" MgO crystals has been investigated. The coloration is enhanced by impurities when the radiation temperature is in the range 80-330^∘{}K. Unlike the more ionic alkali halides, the F-center production rate is a linear function of electron-irradiation intensity and decreases with irradiation energy. For a given dose of radiation, fast neutrons produce about 50 times as many F centers as do energetic electrons. It is concluded from the study that radiation damage in MgO occurs primarily as a result of elastic collisions, and, that the photochemical processes prevalent in the alkali halides contribute very little, if any, to the damage.
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Sibley et al. (1967) studied this question.
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