抄録
In all quartz samples having different origins, radiation-induced hydrogen radicals (atomic hydrogens) were observed in ESR measurement at 77K in addition to intense Al-centers. An obvious positive correlation was recognized between the hydrogen radical intensities and the reduction of the Al-centers after warming up to room temperature, although there was no clear relationship between hydrogen signals and initial Al-centers at 77K. In isochronal annealing treatments the hydrogen radicals were gradually decreased with increments of temperature and completely disappeared after warming up to room temperature. Similar behavior was shown in the Al-centers, but a few percentages of which were still remained at room temperature. The Al-centers remained gave a linear relation to the blue thermoluminescence (BTL) intensity. We concluded that the hydrogen radicals arising from radiolytic products of OH and molecular water impurities could operate as a “killer” of radiation-induced Alcenters related intimately to emission of BTL in natural quartz.
