Article Sidebar

PDF
Published: 2014-09-30
Abstract Views: 111
Views PDF: 39
DOI: https://doi.org/10.53747/jnst.v4i3.236
Issue
Vol. 4 No. 3 (2014)
Section
Articles
How to Cite
Ha , X. V., Doan , P. T. T., & Nguyen , C. T. (2014). Effects of Gamma and Beta Radiations to Dosimeters Fabricated from K₂YF₅ and K₂GdF₅. Nuclear Science and Technology, 4(3), 47-54. https://doi.org/10.53747/jnst.v4i3.236

Effects of Gamma and Beta Radiations to Dosimeters Fabricated from K₂YF₅ and K₂GdF₅

Ha Xuan Vinh1, Doan Phan Thao Tien1, Nguyen Chi Thang1
1 Nhatrang Institute of Technology Research and Application - VAST 02 Hung Vuong, Nhatrang, Khanhhoa

Main Article Content

Abstract

K2YF5 and K2GdF5 doped with rare earth can be used as thermoluminescent (TL) dosimeters for gamma, beta radiations. In this study, the K2YF5 and K2GdF5 doped with Tb, Pr, Sm, and Dy with different concentrations were synthesized by solid state reaction method. These double fluoride dosimeters were irradiated with different radiations, namely beta and gamma. The study results showed that in general, the TL intensity of K2GdF5 is higher than that of K2YF5. The K2GdF5 crystals doped with Tb3+, Pr3+ have very high TL sensitivities. But the sensitivities of Sm3+, Dy3+ doped- are very low. The TL glow curve of K2YF5:Tb consists of three peaks at temperatures 132oC, 207oC and 240oC, and its intensities are approximately. The TL glow curve of K2GdF5:Tb has dosimetric peak at the temperature 196oC (heating rate 2oC/s), the temperature of this peak suitable for dosimetry application. The TL sensitivity of K2GdF5:Tb is higher than that of TLD-100 and TLD-900 dosimeters for the gamma and beta radiation. The dosimeters K2GdF5:Tb has high sensitivity and linearity for gamma, beta radiations. In addition, the thermal fading effect of TL intensity was very low. The study results showed that these materials can be used in nuclear radiation dosimeters.

Article Details

Keywords

K₂YF₅:Tb, K₂GdF₅:Tb, thermoluminescence (TL)

References

1. Marcazzó J., et al., “Photo-, radio- and thermoluminescence of Sm3+ doped and Tb3+/Sm3+ doubly doped K2YF5 single crystals”, Journal of Luminescence, 140, p. 82-86, (2013).
2. Van Do P et al., “Judd–Ofelt analysis of spectroscopic properties of Sm3+ ions in K2YF5 crystal”, Journal of Alloys and Compounds. 520, p. 262-265, (2012).
3. Kui H.W et al., “Thermoluminescence properties of double potassium yttrium fluorides singly doped with Ce3+, Tb3+, Dy3+ and Tm3+ in response to and irradiation, Journal of Luminescence. 117(1), p. 29-38, (2006).
4. Huy B.T, V.X. Quang, and H.T.B. Chau, “Effect of doping on the luminescence properties of Li2B4O7”, Journal of Luminescence. 128(10), p. 1601-1605, (2008).
5. Faria L.O et al., “Thermoluminescence response of K2YF5:Tb3+ crystals to photon radiation fields”, Radiation Protection Dosimetry. 112(3), p. 435-438, (2004).
6. Hanh H.K et al., “Thermoluminescence properties of isostructural K2YF5 and K2GdF5 crystals doped with Tb3+ in response to α, β and X-ray irradiation”, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 268(20), p. 3344-3350, (2010).
7. Azorín J et al., Determination of the kinetic parameters of K2YF5:Tb from isothermal decay of thermoluminescence. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 580(1), p. 177-179, (2007).
8. James O. Eckert, Jr et al. Energetics of formation of KF-GdF3 binary-intermediate compounds, Thermochimica Acta. 286(2), p. 233-243, (1996).
9. Silva E.C et al., Preliminary TL Studies of K2GdF5:Dy3+ exposed to photon and neutron radiation fields. Radiation Measurements. 59, p. 119-122, (2013).
10. McLean D., J. Varas, and N. Khaidukov, Initial thermoluminescent dosimetry experience with K2YF5 materials using beta and X-ray sources. Radiation Physics and Chemistry. 71, p. 995-996, (2004).