Development of sintered composites of CaSO₄ doped with Dy and Nd
by Marcos Antonio Passos Chagas, Lucas De Jesus Parente, Divanizia Do Nascimento Souza
Atoms for Peace: an International Journal (AFP), Vol. 3, No. 1, 2010

Abstract: The main purpose of this work is the development of sintered composites in order to allow their use as thermoluminescence (TL) dosimeters using a simple route to preparation and employing high temperature. The composites were prepared with CaSO₄.2H₂O doped with Dy₂O₃ and NdO₃. Initially, CaSO₄.2H₂O was dehydrated in an oven at 100°C for 1 h. After addition of dopants and homogenisation, Polyvinyl Alcohol (PVA) was incorporated into the compounds to make their compaction easier. The pellets, 6 mm in diameter and 1 mm thick, were sintered at 900°C and 1000°C for 6 h. The TL emission curves showed two peaks when the samples were irradiated with a beta source (⁹⁰Sr + ⁹⁰Y). During calibration, TL responses were found to be proportional to the absorbed dose. The results showed that this material can potentially be used in dosimetry.

Online publication date: Mon, 18-Jan-2010

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