No Access Published Online: 05 August 2010
AIP Conference Proceedings 1265, 391 (2010); https://doi.org/10.1063/1.3480209
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• Department of Nuclear Physics, Institute of Physics, University of São Paulo, CP: 66.318, Sao Paulo‐SP 05315‐970, Brazil
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• Henry Javier Ccallata
• Shigueo Watanabe
In this study, the thermoluminescence (TL) properties of natural crystal of zoisite were investigated after beta $(90Sr)$ irradiation at room temperature (RT). Zoisite, of chemical formula $Ca2Al3(SiO4)(Si2O7)O(OH),$ is found in Minas Gerais State, Brazil as natural mineral of silicate, member of the epidote group. The glow curve of a natural sample submitted to a heat treatment at 600 °C is composed of two broad peaks, centered at about 110–130 °C and another one at about 205–210 °C. A heating rate of $4 °C s−1$ was used in the temperature range from RT to 300 °C. The additive dose, $Tm‐TSTOP$ thermal cleaning, initial rise, variable heating rate and computerized glow curve deconvolution methods have shown that the glow curve is a superposition of six peaks at 100, 130, 155, 175, 200 and 230 °C. The trapping parameters for the individual peaks have been calculated. The TL dose response of 130 and 200 °C peaks has a linear response. Zoisite is a candidate for a TL dosimeter because of its high sensitivity.
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