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  • 1 Tokyo Institute of Technology Department of Chemistry, Faculty of Science Department of Organic and Polymeric Materials 2-12-1 O-okayama Meguro-ku, Tokyo 152-8552 Japan E-mail
  • | 2 Niigata University Graduate School of Science and Technology Ikarashi-Ninocho, Niigata 950-2181 Japan
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Two kinds of feldspars, such as microcline and albite, were irradiated with g-rays of 250 Gy in 77 K and followed by ESR-measurements at 77 K. First ESR-spectra showed an Al-Oh+ center peak at a centeral part and hydrogen radical peaks having hyperfine (HF) splitting width of 50.2 mT. Second ESR-spectra measured after warming up to room temperature once showed eleven absorption peaks owing to an Al-Oh+-Al center, together with complete disappearance of H0-radicals. The Al-Oh+-Al signals in ESR-spectra showed similar dose response curves in both feldspars, giving almost linear relationships up to several hundred Gy and saturation behavior beyond 1 kGy. Thermal treatment of the feldspars induced an interesting appearance of two new hydrogen radicals in the ESR spectrum, which possess broader HF splitting in the ESR-spectra and relatively stable property at room temperature. The correlation of Al-Oh+-Al centers and the BTL intensities around 180 °C peak showed linear dependency. As a result, it is concluded that the Al-Oh+-Al centers should be main BTL-luminescence centers around the 180 °C peak in the feldspars.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
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Founder Akadémiai Kiadó
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ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)