 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Calibration of HPGe Gamma-Ray Planar Detector System for Radioactivity Standards) ผู้เขียน: Tidatrut Vichaidid, Thongchai Soodprasert, Teerasak Verapaspong สื่อสิ่งพิมพ์:pdf AbstractQuantitative analysis of radioactive materials using efficiency calibration of gamma ray high purity germanium planar detector system has been studied. Seven standard sources including Eu-152, Ba-133, Ag-110, Ho-166, Cs-134, Cs-137 and Co-57 were used for calibrating incident gamma ray energy to memory channels obtained by the new multi-channel analyzer which have been observed in the energy ranges from 25 to 1240 keV. The general equation of efficiency curve with varied source-todetector distance obtained at high energy range has shown up to 3% of uncertainties, k=2 when compared to low energy range of uncertainties up to 30% at 95% confidence interval when the dead time effect was also mentioned and corrected. |