Preparation and Thermoluminescence Properties of Polycrystalline  Na2SO4/SiO2 composite

Fatma  Omer; Youssef Abdulla; Abdullah M. Noh

doi:10.15392/2319-0612.2024.2322

Autores

Fatma Omer
Youssef Abdulla Sebha University
Abdullah M. Noh

DOI:

https://doi.org/10.15392/2319-0612.2024.2322

Palavras-chave:

TLD, Geode, Silica

Resumo

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 Z_eff of Na₂SO₄/SiO₂ was found to be 13.56.

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