Investigation Of Dosimetric Features Of Beta – Irradiated Er3+ Doped Strontium Pyrophosphate

Nimesh P. Patel1*, M. Srinivas1, Vishwnath Verma1, Dhaval Modi1, K. V. R.Murthy2

1Department of Physics, Faculty of Science, M. S. University of Baroda, Vadodara 390002, India

2Department of Applied Physics, Faculty of Technology and Engineering, The M. S. University of Baroda, Vadodara 390003, India

Adv. Mater. Lett., 2016, 7 (6), pp 497-500

DOI: 10.5185/amlett.2016.6160

Publication Date (Web): May 30, 2016

E-mail: nimesh.0112@gmail.com

Abstract


Thermoluminescence (TL) of Sr2P2O7: Er3+ phosphors had been studied in order to investigate the nature of the trapping centers created due to doping ions. The effect of beta – irradiation was analyzed for various doses given to the samples. The measurements of TL glow curves have been done at the heating rate 6 K/s. The TL measurements done for the study of the dosimetric properties of samples showed that the β-dose response is linear from 5 Gy to about 50 Gy. The experimental glow curves had been analyzed by glow curve fitting technique which revealed that the glow curve is consist of three curves with peak temperature 400 K, 430 K and 464 K. The activation energy ‘Ea’ of the peaks had been calculated to be 0.90 ± 0.03 eV, 1.10 ± 0.04 eV and 1.05 ± 0.03 eV, respectively. The geometrical factor ‘μg having values 0.51, 0.52 and 0.48, imply that the glow curve having second order kinetics. The linear dose response, fading effect after exposed and reusability of samples are very reliable for dosimetry applications. 

Keywords

Strontium pyrophosphate, thermoluminescence (TL), peak shape method, activation energy

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