Effect of thermal annealing on the thermoluminescent properties of nano-calcium fluoride and its dose-response characteristics.

Autor:	Mundupuzhakal JK; Department of Applied Physics, Faculty of Technology, MS University of Baroda, Vadodara 390001, India johnsj73@gmail.com., Biswas RH; Department of Applied Physics, Okayama University of Science, Okayama 700-0005, Japan., Chauhan S; Department of Applied Physics, Faculty of Technology, MS University of Baroda, Vadodara 390001, India., Varma V; Physical Research Laboratory, Ahmedabad 380009, India., Acharya YB; Physical Research Laboratory, Ahmedabad 380009, India., Chakrabarty BS; Department of Applied Physics, Faculty of Technology, MS University of Baroda, Vadodara 390001, India.
Jazyk:	angličtina
Zdroj:	Radiation protection dosimetry [Radiat Prot Dosimetry] 2015 Dec; Vol. 167 (4), pp. 419-24. Date of Electronic Publication: 2014 Nov 13.
DOI:	10.1093/rpd/ncu333
Abstrakt:	Nano-CaF2, prepared by the co-precipitation method, was annealed under different annealing conditions to improve its thermoluminescence (TL) characteristics. Different annealing parameters, such as temperature (400-700°C), duration (1-4 h) and environment (vacuum and air), were explored. The effect on TL sensitivity, peak position (Tm) and full-width at half-maximum (FWHM) with respect to the different annealing conditions are discussed as they are the measure of crystallinity of the material. Annealing temperature of 500°C with annealing duration of two and a half hours in vacuum provided the highest luminescence response (i.e. maximum sensitivity, minimum peak temperature and FWHM). Wide detectable dose range (5 mGy to 2 kGy), absence of thermal quenching and sufficient activation energy (1.04 eV) of this phosphor make it suitable for dosimetric applications. (© The Author 2014. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu