Thermoluminescence Characterization Of Gama-ray Irradiated Dy3+ Activated SrAl4O7 Nanophosphor

¹Christian College of Engineering & Technology, Kailash Nagar, Bhilai, 490026, Chhattisgarh, India

²S.O.S. in Physics & Astrophysics, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India

³Department of Physics, R.T.M. Nagpur University, Nagpur 440033, India

⁴Department of Physics, V.M.V. Commerce J.M.T Arts and J.J.T. Science College, Nagpur 440008, India

Adv. Mater. Lett., 2014, 5 (7), pp 396-399

DOI: 10.5185/amlett.2014.amwc.1210

Publication Date (Web): Apr 27, 2014

Copyright © IAAM-VBRI Press

E-mail: anil.choubey@hotmail.com

Abstract

Dy doped strontium aluminate phosphor (SrAl₄O₇:Dy(15% molar concentration)) was synthesized by combustion method using urea as a reducer at initiating temperature of 600oC. The absorption spectra shows the absorption edges at l = 242 nm, thus the band gap of 5.11 eV. The Thermoluminescence (TL) property of Dy(15%) doped SrAl₄O₇ nanophosphor has been investigated for l-irradiation. The TL glow curve of SrAl4O7:Dy (15%) phosphor with different ?-ray doses show the dose increases the TL- intensity while the temperature corresponding to maximum intensity remains nearly same. The maximum TL-intensity observes around 172.84 oC for the different doses. It was found that TL intensity strongly depends upon the -dose. It shows linear response upto 2.36 kGy. Hence Dy(15%) doped SrAl4O7 could be used for TL Dosimetry upto 2.36 kGy.

Keywords

Thermoluminescence, combustion synthesis, strontium aluminate.