Optically stimulated luminescence in Ag doped Li2B4O7 single crystal and its sensitivity to neutron detection and dosimetry in OSL mode

• Published in: Radiation measurements Vol. 88; pp. 14 - 19
• Main Authors: Patra, G.D., Singh, S.G., Tiwari, B., Singh, A.K., Desai, D.G., Tyagi, M., Sen, S., Gadkari, S.C.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-05-2016
• Subjects: Lithium tetraborate (LTB); Optically stimulated luminescence (OSL); Photoluminescence (PL); Single crystal; Thermally stimulated luminescence (TSL); Thermally stimulated luminescence (TSL); Photoluminescence (PL); Optically stimulated luminescence (OSL); Lithium tetraborate (LTB); Single crystal
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/j.radmeas.2016.03.002

Optically stimulated luminescence (OSL) measurements have been carried out on single crystals of Ag doped Li2B4O7 (LTB:Ag) after exposure to various nuclear radiations. The time integrated OSL intensity is found to be linear in the range from 0.1 Gy to 500 Gy. Fading of the OSL signal was found to be around 36% in 48 h. The presence of 6Li and 10B has been gainfully utilized to measure doses of thermal neutrons. Further, the large difference between the wavelength of the stimulation source (∼460 nm) and emission from the LTB:Ag at 270 nm has enhanced the signal-to-noise ratio in a simple OSL set-up with suitable filters. The high sensitivity of the LTB:Ag to thermal neutrons will be useful in variety of applications including personal dosimetry in mixed-fields and imaging devices for neutron radiography.
•Li2B4O7:Ag single crystals are grown by the Czochralski technique.•Li2B4O7:Ag single crystals are investigated using TSL, OSL techniques.•These crystals are found promising for OSL dosimetry.