Research for (100)-Oriented Diamond Film Radiation Detector

High quality (100)-oriented diamond film was prepared by Microwave Plasma Chemical Vapor Deposition (MPCVD) with thickness of 100| . A | particle detector was successfully made on the prepared film. The charge collection efficiency is 37.7% under -100V bias in average while the maximum reaches 60%. On the basis of this, diamond neutron detector is successfully developed by evaporating a layer of 10B converter with a proper thickness on the surface with an evidently increased response to | particle. At the electric field of 1V/| , the energy resolution is 9.3%, the detecting efficiency to 252Cf neutron is 1.67%. Electric field and converter thickness have influences on the detecting efficiency. With the converter thickness increasing, the detecting efficiency increases, when the thickness reaches 1.5| , the deteting efficiency turn to decrease.