影响测量建筑材料放射性准确性的因素实验研究

发布时间：2018-05-15 02:33

本文选题：建材放射性 + 样品粒径　；参考：《核电子学与探测技术》2015年10期

【摘要】：为提高检测建筑材料中放射性核素~(232)Th、~(226)Ra、~(40)K含量的准确性,利用低本底NaI(TI)γ谱仪就样品的粒径、含水量、封样时间对检测结果的影响进行了实验研究。结果表明:样品粒径、含水量、封样时间影响建材中放射性核素含量和内、外照射系数测量数据,且内、外照射系数随样品条件变化呈现一定变化的规律;当样品满足粒径小于0.16 mm、含水量0%、封样时间不小于10 d的条件时,测量的结果能够较好地反映建材的放射性;如果不满足条件,则应该对测量的数据进行相应的修正。
[Abstract]:In order to improve the accuracy of detecting the content of radionuclide 232T 226K in building materials, the effect of sample size, water content and sealing time on the detection results was studied by using a low background NaII-TI 纬 spectrometer. The results show that the particle size, water content and sealing time of the samples affect the radionuclide content and the internal and external radiation coefficients of building materials, and the internal and external radiation coefficients vary with the sample condition to a certain extent. When the size of the sample is less than 0.16 mm, the water content is 0 and the sealing time is not less than 10 days, the measured results can well reflect the radioactivity of the building materials; if the conditions are not satisfied, the measured data should be corrected accordingly.
【作者单位】：南华大学核科学技术学院;
【基金】：国家级大学生创新创业训练计划项目(201410555009)资助
【分类号】：TU502

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