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Preparation Route, characterization and Dose measurement of MAl2O4( M=Ba, Ca, Mg) phosphors activated with Dy3+

K. K. SATAPATHY1,* , G. C. MISHRA2

Affiliation

  1. Department of Applied Chemistry, O.P. Jindal Institute of Technology, Raigarh 496109 India
  2. Department of Applied Physics, O.P. Jindal Institute of Technology, Raigarh 496109 India

Abstract

The polycrystalline powder samples of MAl2O4:Dy (M= Ba, Mg, Ca) phosphor were prepared using urea as fuel by a combustion route. Powder X-ray diffraction confirms the phase and structure. Photoluminescence(PL) emission spectrum showed characteristic emission of Dy doped in the aluminate samples. The ML(mechanoluminescence) and TL(thermoluminescence) intensity increases with increasing gamma ray dose. TL and ML measurements were carried out on Dy3+doped aluminates using gamma irradiation in the dose range 0.2-2.2 kGy. It is observed that MAl2O4 (M= Ba, Mg, Ca) doped with Dy phosphors have linear response up to about1.1 kGy of radiation dose and show low fading(5-6% over the period of 15 days) for ML and TL measurement. The simple glow curve, linear response to gamma ray dose and less fading make the MgAl2O4:Dy phosphor a suitable candidate for TL and ML dosimetry..

Keywords

Thermoluminescence, Mechanoluminescence, Dosimetry, Aluminates, Combustion.

Submitted at: Jan. 20, 2014
Accepted at: May 7, 2015

Citation

K. K. SATAPATHY, G. C. MISHRA, Preparation Route, characterization and Dose measurement of MAl2O4( M=Ba, Ca, Mg) phosphors activated with Dy3+, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 5-6, pp. 629-633 (2015)