Author:
Omer Fatma,Abdulla Youssef,M. Noh Abdullah
Abstract
A sodium sulphate/silica (Na2SO4/SiO2) composite was prepared by a sol-gel procedure using a geode as the silica source. The prepared sample was characterized by XRD, XRF and IR techniques. The Na2SO4/SiO2 has an orthorhombic phase, and an average crystalline size is about 51 nm. Thermoluminescence characteristics of Na2SO4/SiO2 were studied at different parameters. The glow curve resulting from Na2SO4/SiO2 showed one clear peak between 150 oC to 200 oC, depending on the energy. The general peak structure of the TL glow curve remains unchanged as a result of repeated cycles of irradiation at various X–ray energies, and exhibits good linearity over the used exposure. There were no significant changes in the TL reading after ten times of reuse, and the fading was observed at 56% after 15 days of irradiation and after one month about 82.3% of the TL signal was lost, and the value of Zeff of Na2SO4/SiO2 was found to be 13.56.
Publisher
Sociedade Brasilieira de Protecao Radiologica - SBPR
Reference19 articles.
1. KRON, T. Thermoluminescence dosimetry and its applications in medicine-Part 1: Physics, materials and equipment. Australasian Physical and Engineering Sciences in Medicine. 1994, 17, 175–199.
2. MOSCOVITCH, M.; JOHN, T.J.; CASSATA, J. R.; BLAKE, P. K.; ROTUNDA, J. E.; RAMLO, M.; VELBECK, K.J.; LUO, L. Z. The application of LiF:Mg,Cu,P to large scale personnel dosimetry: Current status and future directions. Radiation Protection Dosimetry. 2006, 119, 248–254.
3. CHAND, S.; MEHRA, R.; CHOPRA, V. Recent developments in phosphate materials for their thermoluminescence dosimeter (TLD) applications. Luminescence 2021, 36, 1808–1817.
4. Preusser, F.; Chithambo, M. L.; Götte, T.; Martini, M.; Ramseyer, K.; Sendezera, E. J.; Susino, G. J.; Wintle, A.G. Quartz as a natural luminescence dosimeter. Earth Science Reviews. 2009, 97, 184–214.
5. Thamóné Bozsó, E.; Füri, J.; Kovács István, J.; Biró, T.; Király, E.; Nagy, A.; Törökné Sinka, M.; Kónya, P.; Mészárosné Turi, J.; Vígh, C. Characteristics of quartz separates of different formations in Hungary from the aspect of osl dating. Foldt. Kozlony 2020, 150, 61.