Thermoluminescence properties of non-stoichiometric Li2Si2O5 synthesized from natural amethyst quartz
Küçük Resim Yok
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Bv
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In the present study, on the contrary of lots of researches, stoichiometric (s-LD) and non-stoichiometric (n-LD) lithium disilicate polycrystalline were tried to synthesize using easily available and cheap natural amethyst quartz samples collected from Balikesir Dursunbey Turkey as a starting material by the high temperature solid state method. Structure and morphology of s-LD and n-LD were done using XRD, FTIR and SEM, showing the main structure as lithium disilicate for n-LD. The findings showed that n-LD had better crystal structure and gave better TL response, so a detailed investigation on its main dosimetric properties was studied and presented in this paper. The thermoluminescence (TL) glow curve of n-LD consisted of 3 distinguishable peaks and the main peak was stable since TL sensitivity increased only 12% after 2 kGy of high dose exposure. The reusability results showed that TL intensity decreased maximum 21% and 16% for 5 Gy and 50 Gy, respectively after 11 repeated cycles and n-LD had a superlinearity index (g(D)=1.019). The main peak was just 5% faded in 4 weeks. Consequently, n-LD as a phosphor might be used in many fields concerning with the dose range from 0.1 Gy up to 100 Gy. (C) 2016 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Li2Si2O5, Amethyst, Dose response, Solid state synthesis
Kaynak
Journal of Luminescence
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
179
