Program Information
Synthesis & Characterization of Gd3+ Doped Hafnium Oxide Nanoparticles for Neutron Detection
N Sekar1 , B Ganesan2*, H sahib3 , A Prakasarao4 , M D.K5 , G Singaravelu6 , (1) Anna university, Chennai, TamilNadu, (2) ,,,(3) Anna University, Chennai, Tamil Nadu, (4) Anna University, Chennai, TamilNadu, (5) Safety research Institute, AERB, Kancheepuram, TamilNadu, (6) Anna University, Chennai, TamilNadu
Presentations
SU-I-GPD-T-551 (Sunday, July 30, 2017) 3:00 PM - 6:00 PM Room: Exhibit Hall
Purpose: To study the neutron sensitivity using Gd3+ doped Hafnium Oxide. HfO2 was synthesized and doped with gadolinium and it structural & Morphological characteristic were analyzed using various techniques, the material was irradiated using Americium-beryllium (Am-Be) neutron sources, to determine the neutron sensitivity.
Methods: Intrinsic and Gd3+ doped HfO2 nanoparticles with different Gd content (2.5-10% in weight) was prepared by precipitation method and the nano particles were characterised by X-ray diffraction, SEM-EDX, UV-Visible spectrophotometer, FTIR, Raman spectroscopy and pellets were made by hydraulic method and the material was irradiated using Am-Be neutron source for various concentration of Gd3+
Results: Crystalline characteristics of pure and Gd3+ doped HfO2 powder were obtained by the precipitation method and calcined at 800°C for 2 hrs in air. The obtained XRD-spectrum is in excellent agreement with the standard JPCDS. The particle size, composition and morphology of the synthesized NPs have been examined using SEM-EDAX. The optical properties of HfO2 NPs were studied by UV–Vis absorption spectroscopy to measure of the optical band gap of Pure and doped HfO2 NPs. In order to determine the vibration state of atomic bonds in molecule FTIR measurements were observed. Raman spectroscopy was used to characterize the samples of pure and extrinsic HfO2 to analysis the Raman band for monoclinic to cubic phase transformation and supported to the XRD. A typical TL glow curve of HfO2 exposed to Am-Be neutron sources for various Gd content is obtained by Thermo luminescence Reader Type TL1009I. These glow curves were analyzed for various doping percentage.
Conclusion: Pure and Gd3+ doped HfO2 NPs powder can be used as TL material to detect neutron and its detection efficiency can be increased by using various doping materials in HfO2.
Contact Email: