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Optically stimulated luminescence in doped K3Na(SO4)2 phosphors |
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| Affiliation: | 1. Institute of Science, R.T. Road, Civil Lines, Nagpur, India;2. Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, India;3. C/o RPAD, BARC, Mumbai, India;4. R.T.M Nagpur University, Nagpur, India;1. Medical Physics Unit, IRCH, AIIMS, New Delhi 110029, India;2. Earlier at Inter-University Accelerator Center, Aruna Asaf Ali Marg, New Delhi 110067, India;1. Çukurova University, Art Sciences Faculty, Physics Department, 01330 Balcalı, Sarıçam, Adana, Turkey;2. Adıyaman University, Engineering Faculty, Department of Electrical Electronic Engineering, 02040 Adıyaman, Turkey;3. Iskenderun Technical University, Department of Engineering Science, Hatay, Turkey;4. Mersin University, Art Sciences Faculty, Physics Department, Mersin, Turkey;5. Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA;6. Hasan Kalyoncu University, Faculty of Engineering, Department of Electrical and Electronics Engineering, Gaziantep, Turkey;1. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein ZA9300, South Africa;2. School of Physics, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa |
| Abstract: | Optically stimulated luminescence (OSL) in Cu and Eu doped K3Na(SO4)2 is reported for the first time. The Cu-doped sample shows OSL sensitivity which gets enhanced by co-doping with Mg2+ ions. The Cu-doped and quenched sample shows better sensitivity which is almost double than that of the slowly cooled sample, whereas the sensitivity of Mg co-doped sample remains nearly same irrespective of the thermal treatment. The Cu-doped sample shows TL peak around 200 °C and moderate OSL sensitivity. Doping of Mg shifts the TL peak to around 160 °C and is correlated with good OSL sensitivity. Eu-doped sample does not show OSL sensitivity. However, relatively good OSL sensitivity is observed in Aluminium co-doped and slowly cooled sample, which is about 15% of the commercial Al2O3:C(Landuer Inc.). A near fully optically sensitive TL peak around 155 °C is observed. The dose response is linear and practically no OSL fading is observed in first five days of storage in slowly cooled sample. This study on conventional sulphate-based TL phosphors will be useful in developing OSL phosphors for radiation dosimetry. |
| Keywords: | Inorganic materials Thermoluminescence Optically stimulated luminescence Optical properties Radiation effects Sulphate based phosphors |
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