CAJ | 학술논문

论述了通道式车辆放射性测控系统对γ放射性核素活度探测阈值的测定方法.探测阈值是针对某一确定γ放射性核素而言的,表示对该核素可探测的最低活度,表征了放射性测控系统的探测能力,同时也是设置系统报警阈值的依据.探测阈值可通过探测器本底计数率的统计涨落以及对参考测量点活度响应的测量结果计算获得.对于确定的参考测量点,探测阈值与探测器本底计数率统计涨落和γ放射性核素的能谱相关.
논술료통도식차량방사성측공계통대γ방사성핵소활도탐측역치적측정방법.탐측역치시침대모일학정γ방사성핵소이언적,표시대해핵소가탐측적최저활도,표정료방사성측공계통적탐측능력,동시야시설치계통보경역치적의거.탐측역치가통과탐측기본저계수솔적통계창락이급대삼고측량점활도향응적측량결과계산획득.대우학정적삼고측량점,탐측역치여탐측기본저계수솔통계창락화γ방사성핵소적능보상관.
A testing method on detection threshold for channel vehicle radiation monitoring system to γ ra-dionuclide activity was discussed. The detection threshold to certain radionuelide indicates the minimum detectable activity, which characterizes the detection ability of system as well as is the foundation for sys-tem alarm setting. The detetion threshold can be obtained by calculating the statistical fluctuation of the background of detector and the measuring results to activity response of reference point, for a certain ref-erence point, detection threshold is related to the statistical fluctuation of the background and γ-energy spectrum.