Synthesis and thermoluminescence studies of γ-irradiated Dy{sup 3+} doped SrGd{sub 2}O{sub 4} phosphor
- Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004 (India)
- Inter University Accelerator Center, New Delhi, 110067 (India)
Highlights: • SrGd2O4:Dy3+ phosphors have been prepared via homogeneous precipitation cum auto-combustion method for the first time. • TL characteristics of γ-irradiated SrGd2O4: Dy3+ phosphors were studied for various Dy3+ contents and heating rates. • Linear TL profile, less fading and high reproducibility of the present phosphor system reveals its applicability in TL dosimetry. - Abstract: Dy{sup 3+} doped SrGd{sub 2}O{sub 4} phosphors were synthesized via homogeneous precipitation cum auto-combustion method for the first time. Orthorhombic phase formation and granular morphology of SrGd{sub 2}O{sub 4}: Dy{sup 3+} samples were investigated through X-ray diffraction (XRD) and microscopic studies. Thermoluminescence (TL) characteristics of SrGd{sub 2}O{sub 4}: Dy{sup 3+} phosphors were taken after exposure of {sup 60}Co γ-rays. The TL glow curve of as-prepared phosphors was well-resolved into five peaks 114 °C, 161 °C, 198 °C, 248 °C, and 293 °C by using computerized glow curve deconvolution program. The effect of impurity (Dy{sup 3+}) contents and heating rates for the TL glow curves were also studied. The linear behaviour of as-formed SrGd{sub 2}O{sub 4}: Dy{sup 3+} samples are observed within a wide range of dose of 80 Gy–2 kGy. Fading characteristics of SrGd{sub 2}O{sub 4}: Dy{sup 3+} phosphor was studied over the duration of 30 days. A comparative study was done to estimate different trapping parameters by employing Chen’s peak shape method and CGCD simulation of TL glow curves.
- OSTI ID:
- 22730410
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 94; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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