Luminescence features of dysprosium and phosphorus oxide co-doped lithium magnesium borate glass. (August 2017)

• Record Type: Journal Article
• Authors: Hashim, S.; Mhareb, M.H.A.; Ghoshal, S.K.; Alajerami, Y.S.M.; Saripan, M.I.; Bradley, D.A.
• Is Part Of: Radiation physics and chemistry. Volume 137(2017)
• Page Start: 45
• Page End: 48
• Publication Date: 2017-08
• Subjects: Borate glass -- Dysprosium oxide -- Phosphorus oxide -- Thermoluminescence -- Photoluminescence; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2016.10.004
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Lithium magnesium borate (LMB) glass system co-doped with the oxides of dysprosium (Dy2 O3 ) and phosphorus (P2 O5 ) were synthesized using melt-quenching method. Prepared samples were characterized using various techniques to determine the effects of co-dopants concentration variation on their thermoluminescence (TL) and photoluminescence (PL) properties. TL glow curves of LMB:0.5Dy sample revealed a single prominent peak at T m =190 °C, where TL intensity was enhanced by a factor of 2.5 with the increase of P2 O5 concentration up to 1 mol%. This enhancement was accompanied by a shift in T m towards higher temperature. Good linearity in the range of 1–100 Gy with linear correlation coefficient of 0.998 was achieved. PL spectra displayed two significant peaks centred at 481 nm and 573 nm. These attractive luminescence features of the proposed glass system may be useful for the development of radiation dosimetry. Highlights: A simple glow curve exhibits a peak at 220 °C and optimum intensity for 1 mol% of phosphorus ions. A good linearity up to 100 Gy in the dose response with correlation coefficient ~0.998. Two emission bands evidenced at 481 nm and 573 nm are assigned to 4 F9/2 → 4 H13/2 and 4 F9/2 → 4 H13/2 transitions, respectively.