My primary research interest is to study stimulated luminescence properties of various synthesised and natural minerals and finding their application in radiation dosimetry and dating. During my PhD research work, I had collected various natural minerals including biotite, muscovite, kyanite, calcite, sillimanite and quartz from various regions of North-East India and studied their thermoluminescence properties. I had used various techniques for sample characterization including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDXS), X-Ray Fluorescence Spectroscopy (XRFS), Differential Scanning Calorimetry (DSC) etc. The outcomes of my PhD research show that the minerals namely biotite, muscovite, kyanite, calcite, sillimanite have great potential for natural radiation dosimetry and dating application. Further, during my Post-Doctoral research, I studied stimulated luminescence properties of some synthesised (α-Al2O3:C and α-Al2O3:C,Mg) as well as natural materials (quartz, corundum, limestone, microcline, feldspar) using thermoluminescence (TL), optically-stimulated luminescence (OSL), infrared-stimulated luminescence (IRSL), thermally-assisted optically stimulated luminescence (TA-OSL), phototransferred thermoluminescence (PTTL), radioluminescence (RL) etc. These TL, OSL and RL are very strong tools to study crystal defects. Moreover, the TL, OSL, IRSL, TA-OSL and PTTL are well established techniques for radiation dosimetry and dating. Persistent luminescence is a very interesting and useful property of some phosphors. I have studied the mechanism behind persistent luminescence of some long lasting persistent luminescence phosphors.
In addition to my primary research interest, concurrently, I am also working in the field of thin film deposition and their application in high energy (X-ray and UV) radiation sensor. We have successfully deposited various semiconductor thin films and studied their radiation sensing characteristics for application in real-time radiation dosimetry.
Distinguish research collaborators:
Prof. M.L. Chithambo, Head of the Department
Department of Physics and Electronics, Rhodes University, SOUTH AFRICA
Prof. V. Pagonis, Professor emeritus of Physics
Department of Physics, McDaniel College, USA
Dr. G.S. Polymeris, Researcher
Institute of Nanosciences and Nanotechnology, GREECE