Kenkyu-Honkan bldg. 1F - Kobayashi Hall
Europium Oxide (EO) Phosphor: Study its behavior for Thermal Neutron Detector
- Dr. Mahesh Sakharam BHADANE
Neutron detectors are vital devices used in various fields like nuclear power, nuclear medicine, particle physics, etc. In the present work, pure europium oxide (Eu2O3) shows the remarkable results for thermal neutron detection. The natural thermal neutron source Cf-252 having flux 106 n/sec/cm2 was used for irradiation of Eu2O3 samples. All the thermal neutron fluences were measured in ex-situ time [1-3]. For the structural confirmation, the samples were characterized by using XRD and from the data it was observed that the intensity of the characteristics peaks decreased with the increase in the neutron fluence. Moreover, thermal neutron dosimetric characteristics of the present phosphor, such as thermoluminescence glow curve, TL dose–response, fading, repeatability have been studied. This phosphor powder represents a deeper level dosimetric trap, which provides the TL glow peak around 303 oC. The TL response of Eu2O3 phosphor as a function of thermal neutron fluence is observed to be very linear up to the fluence of 1.55 X 1011 n/cm2 and then saturates with further increase in the fluence. In addition, the TL glow curves were deconvoluted by glow curve deconvolution (GCD) method and corresponding trapping parameters have been determined. It has been found that for every deconvoluted peak there is a specific level of energy trapping. The europium oxide phosphor has been used effectively for the neutron dosimetric application.