中子个人剂量测量不确定度是个人剂量检测报告的重要组成部分,用于评估职业人员中子个人剂量测量的可靠性和测量结果的可信程度.结合固体核径迹技术监测工作人员中子个人剂量的实际情况,建立数学模型,分析中子剂量刻度曲线、剂量计计数...中子个人剂量测量不确定度是个人剂量检测报告的重要组成部分,用于评估职业人员中子个人剂量测量的可靠性和测量结果的可信程度.结合固体核径迹技术监测工作人员中子个人剂量的实际情况,建立数学模型,分析中子剂量刻度曲线、剂量计计数、系统测量重复性、能量依赖性及径迹蚀刻条件等监测过程中不确定度的来源,计算出合成标准不确定度和相对扩展不确定度.评定中子个人剂量不确定度,保证量值测量的准确性,关系到工作人员的职业和健康安全.结果表明,应用固体核径迹技术监测职业人员1个季度的中子个人剂量为0.18±0.05 m Sv,相对扩展不确定度为28%(k=2);提示应关注中子剂量刻度曲线、系统测量重复性及能量依赖性等不确定度的主要来源.将不确定评定方法应用于中子剂量测量实践,可为国内中子监测规范的制定提供一些基础依据.展开更多
The eastern Mediterranean region is an active tectonic setting that includes the Dead Sea Transform Fault, which forms the boundary between the African and the Arabian Plates and crosses Lebanon from south to north, s...The eastern Mediterranean region is an active tectonic setting that includes the Dead Sea Transform Fault, which forms the boundary between the African and the Arabian Plates and crosses Lebanon from south to north, striking in a restraining bend around 25–30°NE. The major structural feature in Lebanon is the Yammouneh Fault, which reaches to Syria and southern Turkey in a north–south direction. Measurements of radon gas concentration and exhalation rates in two locations along the southern segment of the Yammouneh Fault in south Lebanon were performed. Two profiles in the El-Khiam basin and Blat pull-apart basin and perpendicular to the Yammouneh Fault trace were analyzed. An approximate fault width 25–30 m wide was determined in the El-Khiam study area. Temporal increase of radon concentration was measured and correlated with stress/strain tectonic activity and stress drops along the studied fault segment boundary.Anomalous variable radon concentrations were detected during one of the measurements where an earthquake occurred in the region of Tiberias Lake in northern Palestine along the Yammouneh Fault in the study area. Measurements of radon concentration along a station’s profile in Blat village did not show any radon anomalous variation due to the discontinuity along the fault(pull-apart), and possible absence of stress and energy accumulation along the Yammouneh Fault line in that location.展开更多
文摘中子个人剂量测量不确定度是个人剂量检测报告的重要组成部分,用于评估职业人员中子个人剂量测量的可靠性和测量结果的可信程度.结合固体核径迹技术监测工作人员中子个人剂量的实际情况,建立数学模型,分析中子剂量刻度曲线、剂量计计数、系统测量重复性、能量依赖性及径迹蚀刻条件等监测过程中不确定度的来源,计算出合成标准不确定度和相对扩展不确定度.评定中子个人剂量不确定度,保证量值测量的准确性,关系到工作人员的职业和健康安全.结果表明,应用固体核径迹技术监测职业人员1个季度的中子个人剂量为0.18±0.05 m Sv,相对扩展不确定度为28%(k=2);提示应关注中子剂量刻度曲线、系统测量重复性及能量依赖性等不确定度的主要来源.将不确定评定方法应用于中子剂量测量实践,可为国内中子监测规范的制定提供一些基础依据.
基金financial support of the Lebanese National Council for Scientific Research
文摘The eastern Mediterranean region is an active tectonic setting that includes the Dead Sea Transform Fault, which forms the boundary between the African and the Arabian Plates and crosses Lebanon from south to north, striking in a restraining bend around 25–30°NE. The major structural feature in Lebanon is the Yammouneh Fault, which reaches to Syria and southern Turkey in a north–south direction. Measurements of radon gas concentration and exhalation rates in two locations along the southern segment of the Yammouneh Fault in south Lebanon were performed. Two profiles in the El-Khiam basin and Blat pull-apart basin and perpendicular to the Yammouneh Fault trace were analyzed. An approximate fault width 25–30 m wide was determined in the El-Khiam study area. Temporal increase of radon concentration was measured and correlated with stress/strain tectonic activity and stress drops along the studied fault segment boundary.Anomalous variable radon concentrations were detected during one of the measurements where an earthquake occurred in the region of Tiberias Lake in northern Palestine along the Yammouneh Fault in the study area. Measurements of radon concentration along a station’s profile in Blat village did not show any radon anomalous variation due to the discontinuity along the fault(pull-apart), and possible absence of stress and energy accumulation along the Yammouneh Fault line in that location.
