Radiation dosimetry using decreasing TL intensity in a few variety of silicate crystals. (November 2015)

• Record Type: Journal Article
• Authors: Watanabe, Shigueo; Cano, Nilo F.; Gundu Rao, T.K.; Oliveira, Letícia M.; Carmo, Lucas S.; Chubaci, Jose F.D.
• Is Part Of: Applied radiation and isotopes. Volume 105(2015:Nov.)
• Page Start: 119
• Page End: 122
• Publication Date: 2015-11
• Subjects: Silicate -- Radiation dosimetry -- TL -- EPR; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2015.07.056
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: This study shows that there are some ionic crystals which after irradiation with high gamma dose D m and subsequent irradiation with low doses ranging up to 500 Gy present a decreasing TL intensity as dose increases. This interesting feature can be used as a calibration curve in radiation dosimetry. Such behavior can be found in green quartz, three varieties of beryl and pink tourmaline. In all these silicate crystals it can be shown that irradiation with increasing γ-dose there is a dose D m for which the TL intensity is maximum. Of course, D m varies depending on the crystal and irradiated crystal with the dose D m is stable. If one of these crystals is taken and irradiated with doses from low values up to 400–500 Gy, a curve of decreasing TL intensity is obtained; such a curve can be used as a calibration curve. Graphical abstract: Highlights: The TL dose responses of four different natural silicate minerals have been investigated. After the saturation dose, all minerals show a decreasing TL intensity signal with gamma ray dose. These crystals may be used to measure gamma dose that varies from low values up to 400–500 Gy.