Radioluminescence properties of synthetic topaz

E. TRUJILLO-VAZQUEZ; M.I. PECH-CANUL; J. MARCAZZÓ

Tuxtla Gutiérrez, Chiapas

Congreso; XVI SIMPOSIO INTERNACIONAL DE DOSIMETRÍA DE ESTADO SÓLIDO; 2016

Sociedad Mexicana de Irradiación y Dosimetría

In this contribution, a study on the radioluminescence (Rl) response of topaz synthesized by chemical vapor deposition (CVD) ? using sodium hexafluorosilicate (Na2SiF6) as solid precursor ? is reported. Starting from three different reactant compacts, namely, aluminum oxide, aluminum hydroxide and kaolinite, synthesis tests were conducted varying systematically processing temperature and time, reactant compact angle position, and atmosphere (with and without nitrogen during dwell stage). Results reveal the feasibility to form topaz using the three reactants, in yields ranging from 20 to 100%, and with product morphology of rectangular bars and fibers. However, after irradiation with 90Sr beta-source, it was found that only samples prepared using aluminum hydroxide exhibited radioluminescent response. Moreover, H3 sample shows the highest Rl intensity, with emission at 390 nm. The processing conditions that promote the radioluminescent response are 700 °C and 90 min.