Optically stimulated luminescence in doped K3Na(SO4)2 phosphors. (October 2016)

• Record Type: Journal Article
• Authors: Gaikwad, Sonali; More, Yogesh; Patil, R.R.; Kulkarni, M.S.; Bhatt, B.C.; Moharil, S.V.
• Is Part Of: Radiation measurements. Volume 93(2016:Oct.)
• Page Start: 20
• Page End: 27
• Publication Date: 2016-10
• Subjects: Inorganic materials -- Thermoluminescence -- Optically stimulated luminescence -- Optical properties -- Radiation effects -- Sulphate based phosphors; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2016.07.003
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: Optically stimulated luminescence (OSL) in Cu and Eu doped K3 Na(SO4 )2 is reported for the first time. The Cu-doped sample shows OSL sensitivity which gets enhanced by co-doping with Mg 2+ 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 Al2 O3 :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. Highlights: OSL in Cu and Eu doped K3 Na(SO4 )2 is reported for the first time. In Cu doped samples the OSL is affected by thermal treatment as well as Mg 2+ codopant. OSL is observed in Eu doped sample when Al 3+ is codopant. Eu doped sample shows 15% OSL sensitivity to that of Al2 O3 :C. Practically no fading is observed in Eu doped sample.