Cadmium silicate nanopowders for radiation dosimetry application: Luminescence and dielectric studies

Abstract

a b s t r a c tPure cadmium silicate (CdSiO 3 ) nanophosphor was prepared by a low temperature solution combustion technique. In this technique, meso-structured silica was used as silica source. The prepared compounds were well characterized by powder X-ray diffraction (PXRD), scanning electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared and UV-vis spectroscopic techniques. The PXRD peaks of as-formed sample are broad and amorphous in nature. The compound calcined at 800 • C shows pure monoclinic phase, which is the lowest temperature reported so far to obtain in this phase. The average crystallite size for phase pure compound was found to be ∼31 nm. The optical energy band gap of ∼5.6 eV was observed for the compound. Raman spectrum of the sample showed the all possible states of vibrational motions of the prepared samples. The UV irradiated samples with different dose and time with constant heating rate exhibit the thermoluminescence (TL) with a well resolved glow peak at ∼160 • C. The variation of TL intensity with dosage time results that the material was found to be quite useful in radiation dosimetry. The frequency dependent dielectric constant of the prepared sample exhibits high value at low frequency and vice versa.

Evaluation of glasses containing cadmium for high dose dosimetry by the thermoluminescence technique

“…Several glasses have the potential to be applied as high-dose dosimeters, due to its small size, low production cost and dosimetry properties [TEIXEIRA, 2004]. Glasses containing Cadmium (Cd) have been evaluated and showed promising results of being used as dosimeters [MANOHARA et al, 2015;ANJAIAH et al 2014]. However, it is necessary more research to evaluate how the modification on the concentration of Cadmium affects the dosimeter response, justifying this work.…”

Avaliação de novas matrizes vítreas pela técnica de termoluminescência para dosimetria de doses altas

“…Matrizes vítreas que contém Cádmio (Cd) em sua composição têm sido avaliadas e mostram resultados promissores para serem utilizadas como dosímetros pela literatura recente [4,5]. Entretanto, mais estudos são necessários para avaliar como a alteração na concentração de Cádmio, na matriz, afeta a sua resposta dosimétrica.…”