Objective Recent developments in gamma spectroscopy and data processing techniques opened up the possibility of pro-viding high degrees of flexibility for different kinds of ambient,cosmic,and sample-related backgroun...Objective Recent developments in gamma spectroscopy and data processing techniques opened up the possibility of pro-viding high degrees of flexibility for different kinds of ambient,cosmic,and sample-related background suppression.The BALQARAD clover active shield is a newly acquired germanium detector that offers extraordinary and non-conventional time registers in the List File mode to optimize the setup in its different operation modes.Methods The setup’s geometry has been optimized for clover-active shield detector coincidences or anti-coincidences,depending on the details of the particular radioactive sources(^(22)Na,^(60)Co,and ^(137)Cs).The system consists of plastic scintil-lation plates that detect cosmic rays within coincidences with the clover.Results The time delay between the cosmic and clover detector was tested,and the time window of 640 ns was detected by addressing two desired prompt and delayed signals.The registered spectra were characterized by very prominent continua,obscuring low-intensity peaks of weak gamma-ray emissions.The peak-to-Compton ratio and peak-to-total ratio were greatly improved after using offline veto techniques,leading to much greater accuracy in determining the full-energy peak.Conclusion The offline coincidence method’s quick assessment points out the importance of reducing the Compton and background continua in detecting low activities and yields.This study will serve as a basis for more advanced national-level applications.It can benefit from advanced gamma detection systems with highly improved signal-to-background ratios associated with event selection techniques.展开更多
基金BALQARAD project was supported by the Jordanian Scientific Research Support Fund(SRSF)under grant#Bas/2/4/2014。
文摘Objective Recent developments in gamma spectroscopy and data processing techniques opened up the possibility of pro-viding high degrees of flexibility for different kinds of ambient,cosmic,and sample-related background suppression.The BALQARAD clover active shield is a newly acquired germanium detector that offers extraordinary and non-conventional time registers in the List File mode to optimize the setup in its different operation modes.Methods The setup’s geometry has been optimized for clover-active shield detector coincidences or anti-coincidences,depending on the details of the particular radioactive sources(^(22)Na,^(60)Co,and ^(137)Cs).The system consists of plastic scintil-lation plates that detect cosmic rays within coincidences with the clover.Results The time delay between the cosmic and clover detector was tested,and the time window of 640 ns was detected by addressing two desired prompt and delayed signals.The registered spectra were characterized by very prominent continua,obscuring low-intensity peaks of weak gamma-ray emissions.The peak-to-Compton ratio and peak-to-total ratio were greatly improved after using offline veto techniques,leading to much greater accuracy in determining the full-energy peak.Conclusion The offline coincidence method’s quick assessment points out the importance of reducing the Compton and background continua in detecting low activities and yields.This study will serve as a basis for more advanced national-level applications.It can benefit from advanced gamma detection systems with highly improved signal-to-background ratios associated with event selection techniques.
