Dhibar M, Mankad D, Mazumdar I, Kumar G Anil
Dept. of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India.
Dept. of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India.
Appl Radiat Isot. 2016 Dec;118:32-37. doi: 10.1016/j.apradiso.2016.08.013. Epub 2016 Aug 20.
The paper describes the studies on efficiency calibration and coincidence summing correction for a 3.5″×6″ cylindrical LaBr(Ce)detector. GEANT4 simulations were made with point sources, namely, Co, Nb, Na, Sc and Na. The simulated efficiencies, extracted using Co, Nb, Na and Sc that emit coincident gamma rays with same decay intensities, were corrected for coincidence summing by applying the method proposed by Vidmar et al. (2003). The method was applied, for the first time, for correcting the simulated efficiencies extracted using Na that emits coincident gamma rays with different decay intensities. The measured results obtained using Co and Na were found to be in good agreement with simulated results.
本文描述了对一个3.5英寸×6英寸圆柱形溴化镧铈（LaBr(Ce)）探测器进行效率校准和符合相加校正的研究。使用点源（即钴（Co）、铌（Nb）、钠（Na）、钪（Sc）和钠（Na））进行了GEANT4模拟。利用发射具有相同衰变强度的符合伽马射线的钴、铌、钠和钪提取模拟效率，并通过应用维德马等人（2003年）提出的方法对符合相加进行校正。该方法首次应用于校正利用发射具有不同衰变强度的符合伽马射线的钠提取的模拟效率。发现使用钴和钠获得的测量结果与模拟结果高度吻合。
