Thermally stimulated luminescence process in copper and silver co-doped lithium tetraborate single crystals and its implication to dosimetry

• Published in: Journal of luminescence Vol. 137; pp. 28 - 31
• Main Authors: Patra, G.D., Singh, S.G., Tiwari, B., Sen, S., Desai, D.G., Gadkari, S.C.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2013; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Copper; Cross-disciplinary physics: materials science; rheology; Crystals; Czochralski crystal pulling; Dosimeters; Dosimetry; Energy transfer; Exact sciences and technology; Growth from melts; zone melting and refining; Lithium tetraborate; Luminescence; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other luminescence and radiative recombination; Photoluminescence; Physics; Silver; Single crystal; Single crystals; Stimulated emission; Thermally stimulated luminescence; Thermoluminescence; Thermally stimulated luminescence; Czochralski crystal pulling; Dosimetry; Single crystal; Photoluminescence; Doping; Luminescence; Czochralski method; Thermostimulated emission; Lithium compounds; Silver; Monocrystals; Lithium Borates; Copper; Energy transfer; Codoping; Crystal growth from melts; Thermoluminescence
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/j.jlumin.2012.12.007

Single crystals of Li2B4O7 (LTB) doped with Cu and Ag and Cu, Ag co-doped have been grown using the Czochralski technique. Luminescence studies revealed a sensitizer role of Ag in the LTB:Cu,Ag crystal. It is found that, despite an energy transfer from Ag+ to Cu+ centers, emission from both the centers participate in the thermally stimulated luminescence (TSL) of co-doped. We propose that the LTB:Cu,Ag crystal will be a better and efficient material for dosimeters [TSL as well as optically stimulated luminescence (OSL)] compared to singly doped LTB crystals in a photo-readout system having a maximum response in the 200nm to 600nm range. ► Study of sensitizer role of Ag in Cu, Ag co-doped Li2B4O7 (LTB). ► Spectrally resolved thermally stimulated luminescence (TSL) study of co-doped LTB. ► Thermally stimulated luminescence process Cu, Ag co-doped LTB. ► Proposal of photo-readout system for TLD application.