An approach to evaluate the efficiency of γ-ray detectors to determine the radioactivity in environmental samples  

作　　者：Mohamed.S.Badawi Ahmed.M.El-Khatib Samah.M.Diab Sherif.S.Nafee Ekram.A.El-Mallah 

机构地区：[1]Physics Department, Faculty of Science, Alexandria University, 21511 Alexandria, Egypt

出　　处：《Chinese Physics C》2014年第6期60-66,共7页中国物理C（英文版）

摘　　要：This work provides an approach to determine the efficiency of T-ray detectors with a good accuracy in order to determine the concentrations of either naturally occurring or artificially prepared radionuclides. This approach is based on the efficiency transfer formula （ET）, the effective solid angles, the self- absorptions of the source matrix, the attenuation by the source container and the detector housing materials on the detector efficiency. The experimental calibration process was done using radioactive （Cylindrical ＆ Marinelli） sources, in different dimensions, that contain aqueous 152Eu radionuclide. The comparison point to a fine agreement between the experimental measured and calculated efficiencies for the （NaI ＆ HPGe） detectors using volumetric radioactive sources.This work provides an approach to determine the efficiency of T-ray detectors with a good accuracy in order to determine the concentrations of either naturally occurring or artificially prepared radionuclides. This approach is based on the efficiency transfer formula （ET）, the effective solid angles, the self- absorptions of the source matrix, the attenuation by the source container and the detector housing materials on the detector efficiency. The experimental calibration process was done using radioactive （Cylindrical ＆ Marinelli） sources, in different dimensions, that contain aqueous 152Eu radionuclide. The comparison point to a fine agreement between the experimental measured and calculated efficiencies for the （NaI ＆ HPGe） detectors using volumetric radioactive sources.

关 键 词：y-ray detector efficiency efficiency transfer effective solid angles radioactive source 

分 类 号：O572.212[理学—粒子物理与原子核物理]