距离和不均匀性对α、 β表面活度响应测量结果的影响 - 中国科学院上海 .PDFVIP

第34 卷 第5 期 辐射研究与辐射工艺学报 J. Radiat. Res. Radiat. Process. Vol.34, No.5 2016 年10 月 /fushe/CN/volumn/home.shtml October 20 16 距离和不均匀性对、表面活度响应测量结果的影响 陆小军 何林锋 徐一鹤 孙 训 赵 超 唐方东 （上海市计量测试技术研究院 上海 201203 ） 摘要 采用自主研制的、表面污染仪表面活度响应测量定位装置，结合 JJG-中表面活度响应的测 量方法，采用、标准平面源定性和定量地研究距离和不均匀性对、表面污染仪表面活度响应值的影响规 律。实验量化评估发现，、表面活度响应随着距离的变化呈二次多项式关系，相关系数均大于；当、 表面污染仪探头面积很小，且采用五点法不能覆盖标准平面源的活性区面积时，、表面污染仪对该标准 平面源的表面活度响应宜采用五点法测量值的平均值；若污染仪的探头面积采用五点法能覆盖标准平面源的 活性区面积，则对该标准平面源的表面活度响应尽量在标准平面源活性区的中心位置处测量。 关键词 距离，不均匀性，、表面活度响应 中图分类号 TL81 ，TL84 DOI: 10.11889/j.1000-3436.2016.rrj.34.050701 Influence of distance and unevenness on the measurements of the  surface activity response LU Xiaojun HE Linfeng XU Yihe SUN Xun ZHAO Chao TANG Fangdong (Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China) ABSTRACT Self-developed  surface contamination measuring instrument surface activity in response positioning device, combined with the JJG478-1996 which introduced the measurements of surface activity response were used to quantitatively and qualitatively describe the changes of surface activity response with the distance between the source and surface contamination meter, and the unevenness of the source. Quantitative evaluation by experiments found that there was a quadratic polynomial relationship between the surface activity and the distance with the correlation coefficient greater than 0.99. While  surface contamination meter’s probe area was