Nanocrystalline Europium Doped Barium Sulphate as an Energy Independent Thermoluminescent Dosimeter

Nanocrystalline BaSO4:Eu was prepared by the typical chemical co-precipitation method and was characterized using X-Ray Diffraction(XRD). The nanocrystalline sample thus prepared was further separated into two different groups which were each divided into separate packets. One of the groups was exposed to a radiation range from 10Gy to 300Gy of gamma using 1.25 MeV of Co-60, while the other group was irradiated with 1Gy to 300Gy of gamma using 662 KeV of Cs-137. Thus, it was made sure that both the groups had an overlapping range of doses from 10 Gy to 300 Gy for different energies of radiation. At this point, it was observed that the shape of the glow curves remained astonishingly similar for different energies of radiation. Moreover, on studying the TL response curve, it was established that the response curve for the present nanophosphor showed little variation even after changing the energy and source of the gamma radiation. Therefore, it can easily be concluded that the present nanophosphor displays huge potential as an energy independent thermoluminescent dosimeter.