• Saad M Alshehri

      Articles written in Bulletin of Materials Science

    • Preparation of new thermoluminescent material ($100−x$)B$_2$O$_3$–xLi$_2$O: Cu$^{2+}$ for sensing and detection of radiation

      Zeid A Alothman Tansir Ahamad Mu Naushad Saad M Alshehri

      More Details Abstract Fulltext PDF

      The copper-doped lithium borate glass as a thermoluminescent (TL) material ($100−x$)B$_2$O$_3$–$x$Li$_2$O: Cu$^{2+}$ ($x = 20$, 50 and 80 mol%) was prepared by the combustion method. The formation of ($100−x$)B$_2$O$_3$–$x$Li$_2$O: Cu$^{2+}$ after doping 2, 3 and 5 ppm Cu$^{2+}$, was characterized by Fourier transform infrared spectroscopy, X-ray diffraction and transmission electron microscopy. The TL characteristics of the synthesized material were studied at different parameters. The synthesized glass 50B$_2$O$_3$–50i$_2$O: Cu$^{2+}$ with 3 ppm of doped Cu$^{2+}$, exhibited the superior TL properties than other glasses prepared in the current study. The spin-Hamiltonian parameters were assessed using the electron spin resonance spectra of 50B$_2$O$_3$–50Li$_2$O: Cu$^{2+}$ doped with 3 ppm Cu$^{2+}$. The spin-Hamiltonian parameter values in the case of Cu$^{2+}$ revealed that the ground state of Cu$^{2+}$ was $dx^2–y^2$ orbital (${}^2$B$_{1g}$) and the site symmetry around Cu$^{2+}$ ion was distorted octahedral. TL glow curves were recorded with different heating rates (1, 2, 5, 10, 15, and 20°C s$^{−1}$) at the fixed dose $10\times 10^3$ Gy. The results revealed that the glow peak position shifted to higher temperature with heating rate and the heating rate of 10°C s$^{−1}$ showed the superior TL response with highest glow peak which is very good for dosimetry purposes.

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