Investigation of structural, photo and thermoluminescence properties of YAGG:Ce nanogarnet for medical dosimetry application

• Published in: Radiation physics and chemistry (Oxford, England : 1993) Vol. 221; p. 111776
• Main Authors: Saadi, S., Boukerika, A., Kdib, D.E., Bentabet, A., Mahtout, S., Lounis-Mokrani, Z.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-08-2024
• Subjects: Dose response; Nanogarnet; Sol-gel method; Thermoluminescence; YAGG:Ce; Nanogarnet; YAGG:Ce; Dose response; Sol-gel method; Thermoluminescence
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2024.111776

Cerium-doped yttrium aluminum gallium garnet (YAGG:Ce3+) nanophosphors were synthesized using the sol-gel method. Mixed garnet of Y2.97Al5-xGaxO12:Ce0.03 was prepared with varying gallium content: x = 0, 1, 2 and 3 Ga. The effect of gallium substitutions on the structural, photo and thermoluminescence properties of the prepared nanophosphors were studied by X-ray diffraction (XRD), photoluminescence (PL) and thermoluminescence (TL) techniques. XRD results indicated that the single and pure cubic crystal phase was formed for all nanophosphor samples regardless of the Ga content. The PL spectra of all the samples exhibited a green-yellow emission band centered at 522 nm attributed to the 5d → 4f transitions of Ce3+ ions. The TL glow curve spectra recorded after β-particle irradiation showed a strong dependence in terms of position, shape and intensity, of all temperature peaks with the Ga content. The highest TL sensitivity was observed for the sample prepared with x = 2 Ga, with main peak arising at low temperature (85 °C). The sample prepared at x = 1 Ga exhibited also high TL sensitivity with a simple glow curve spectrum showing a main peak at high temperature (∼158 °C). Thus, the linear dose response of this sample has been investigated in the wide dose range from 0.125 to 100 Gy in order to evaluate the potentiality of this material for radiation dosimetry applications.
•Y3Al5-xGaxO12:Ce3+ (x = 0, 1, 2 and 3) nanogarnets were successfully synthesized using sol–gel method.•Structural, photo and thermoluminescence properties of prepared samples exhibited a strong dependence on Ga content.•Pure garnet phase was formed for all prepared samples.•TL glow curve of Y2.97Al4Ga1O12:Ce0.03 exhibited high intensity and simple TL curve suitable for dosimetry.•Y2.97Al4Ga1O12:Ce0.03 demonstrated a good linear behavior within the range 0.125–100 Gy.