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Determination of a consensus scaling factor to convert a Co-60-based alanine dose reading to yield the dose delivered in a high energy electron beam
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.radphyschem.2019.108673
Malcolm McEwen , Arne Miller , Ileana Pazos , Peter Sharpe

Abstract An analysis of the published literature has been carried out to determine a consensus value for the scaling factor required to convert a dose determination using alanine based on a Co-60 calibration to yield the dose delivered in a high energy electron beam (≥6 MeV incident). Published data from the last 15 years were reviewed and combined to give a single, average, scaling factor. In carrying out this analysis, no attempt was made to deconstruct each experiment. The final results of each investigation were used as a coherent ensemble of independent determinations, irrespective of method or alanine dosimeter supplier. Experimental and Monte Calculations were considered separately and only the experimental data was used to determine the scaling factor. The results from six investigations were found to be consistent within their uncertainties and an overall conversion factor of 1.014 (standard uncertainty = 0.5%) was obtained. To be explicit, alanine dose readings determined from a Co-60 alanine calibration should be multiplied by this factor to yield the dose delivered in an electron beam. This scaling factor represents the consensus recommendations of the National Research Council, the National Institute for Standards and Technology, the Technical University of Denmark and the National Physical Laboratory for electron beams (≥6 MeV incident) used in radiation processing applications. By adopting a common factor, it is hoped to improve the consistency of dosimetry at industrial dose levels using high-energy electron beams.

中文翻译:

确定将基于 Co-60 的丙氨酸剂量读数转换为高能电子束中递送的剂量的一致比例因子

摘要 对已发表的文献进行了分析,以确定转换基于 Co-60 校准使用丙氨酸的剂量确定所需的比例因子的一致值,以产生高能电子束(≥6 MeV事件)。对过去 15 年的已发布数据进行审查并合并,得出一个单一的、平均的比例因子。在进行这种分析时,没有试图解构每个实验。每次调查的最终结果都用作独立测定的连贯集合,而与方法或丙氨酸剂量计供应商无关。分别考虑实验和蒙特计算,并且仅使用实验数据来确定比例因子。发现六项调查的结果在其不确定度范围内是一致的,并且获得了 1.014(标准不确定度 = 0.5%)的总转换系数。明确地说,从 Co-60 丙氨酸校准确定的丙氨酸剂量读数应乘以该因子,以产生电子束中传递的剂量。该比例因子代表了国家研究委员会、国家标准与技术研究所、丹麦技术大学和国家物理实验室对辐射处理应用中使用的电子束(≥6 MeV 入射)的共识建议。通过采用公因子,希望提高使用高能电子束的工业剂量水平的剂量学一致性。5%)。明确地说,从 Co-60 丙氨酸校准确定的丙氨酸剂量读数应乘以该因子,以产生电子束中传递的剂量。该比例因子代表了国家研究委员会、国家标准与技术研究所、丹麦技术大学和国家物理实验室对辐射处理应用中使用的电子束(≥6 MeV 入射)的共识建议。通过采用公因子,希望提高使用高能电子束的工业剂量水平的剂量学一致性。5%)。明确地说,从 Co-60 丙氨酸校准确定的丙氨酸剂量读数应乘以该因子,以产生电子束中传递的剂量。该比例因子代表了国家研究委员会、国家标准与技术研究所、丹麦技术大学和国家物理实验室对辐射处理应用中使用的电子束(≥6 MeV 入射)的共识建议。通过采用公因子,希望提高使用高能电子束的工业剂量水平的剂量学一致性。该比例因子代表了国家研究委员会、国家标准与技术研究所、丹麦技术大学和国家物理实验室对辐射处理应用中使用的电子束(≥6 MeV 入射)的共识建议。通过采用公因子,希望提高使用高能电子束的工业剂量水平的剂量学一致性。该比例因子代表了国家研究委员会、国家标准与技术研究所、丹麦技术大学和国家物理实验室对辐射处理应用中使用的电子束(≥6 MeV 入射)的共识建议。通过采用公因子,希望提高使用高能电子束的工业剂量水平的剂量学一致性。
更新日期:2020-06-01
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