活性炭吸附-液闪法测量建材氡析出率的研究
发布时间:2019-04-19 02:16
【摘要】:为实现建材样品氡析出率的自动化测量,本文研究了一种活性炭吸附-液闪测量建材氡析出率的方法,并通过比较活性炭吸附-液闪法与活性炭吸附-γ能谱法在氡析出率标准装置、铀矿砂水泥砖及发泡砖表面测量值之间的差异,验证该方法的准确性。测量结果表明:活性炭吸附-液闪法可在一定条件下忽略反扩散的影响;根据制备的C-LS-Rn标准源可得其刻度系数为72.36min~(-1)·Bq~(-1),对氡的计数效率为120%;累积时间为72h的最小可探测氡析出率为8.15×10~(-4) Bq/(m~2·s);该方法与活性炭吸附-γ能谱法测量结果的相对偏差为10%左右,在可接受范围内。
[Abstract]:In order to realize automatic measurement of radon exhalation rate of building material samples, a method of measuring radon exhalation rate of building materials by activated carbon adsorption-liquid scintillation is studied in this paper. The accuracy of this method is verified by comparing the difference between activated carbon adsorption-liquid flash method and activated carbon adsorption-纬 spectrometry in radon exhalation rate standard device, uranium ore sand cement brick and foaming brick surface measurement. The measurement results show that the influence of anti-diffusion can be ignored by activated carbon adsorption-liquid flash method under certain conditions. The calibration coefficient of the prepared C-LS-Rn standard source is 72.36 min ~ (- 1) Bq~ (- 1), and the efficiency of radon counting is 120%. The minimum detectable radon exhalation rate of 72 h is 8.15 脳 10 ~ (- 4) Bq/ (m2 路s);). The relative deviation between this method and that of activated carbon adsorption-纬 spectrometry is about 10%, which is within acceptable range.
【作者单位】: 南华大学核科学技术学院;
【基金】:国家自然科学基金资助项目(11275094) 中国科学院战略性先导科技专项资金资助项目(XDA10010500)
【分类号】:X837
[Abstract]:In order to realize automatic measurement of radon exhalation rate of building material samples, a method of measuring radon exhalation rate of building materials by activated carbon adsorption-liquid scintillation is studied in this paper. The accuracy of this method is verified by comparing the difference between activated carbon adsorption-liquid flash method and activated carbon adsorption-纬 spectrometry in radon exhalation rate standard device, uranium ore sand cement brick and foaming brick surface measurement. The measurement results show that the influence of anti-diffusion can be ignored by activated carbon adsorption-liquid flash method under certain conditions. The calibration coefficient of the prepared C-LS-Rn standard source is 72.36 min ~ (- 1) Bq~ (- 1), and the efficiency of radon counting is 120%. The minimum detectable radon exhalation rate of 72 h is 8.15 脳 10 ~ (- 4) Bq/ (m2 路s);). The relative deviation between this method and that of activated carbon adsorption-纬 spectrometry is about 10%, which is within acceptable range.
【作者单位】: 南华大学核科学技术学院;
【基金】:国家自然科学基金资助项目(11275094) 中国科学院战略性先导科技专项资金资助项目(XDA10010500)
【分类号】:X837
【相似文献】
相关期刊论文 前10条
1 陶德宁;;用苯甲酰基硫脲黏附的活性炭吸附铀(Ⅳ)[J];铀矿冶;2010年02期
2 王双振;韩晓春;;应用活性炭在燃烧后捕获二氧化碳的研究[J];河北省科学院学报;2012年01期
3 谢赓年;;近年来国外活性炭生产和研究动态[J];林化科技;1974年02期
4 郭亚萍,全燮,陈硕,陈景文,赵雅芝,杨卫身,袁星;水中氯仿的活性炭电增强吸附特性[J];环境科学学报;2003年01期
5 李湘洲;棉秆制活性炭的研究[J];林产工业;2004年04期
6 刘守新,陈广胜,孙承林;活性炭的光催化再生机理[J];环境化学;2005年04期
7 刘晓海;马祥元;彭金辉;张利波;;废活性炭微波再生新工艺的研究[J];环境污染治理技术与设备;2006年08期
8 刘文宏;吕建平;袁怀波;;通过柠檬酸改性提高载银活性炭的抗菌性能[J];应用化学;2007年12期
9 王社宁;;微波场中活性炭升温行为的影响因素研究[J];甘肃科技;2008年21期
10 惠,
本文编号:2460508
本文链接:https://www.wllwen.com/kejilunwen/huanjinggongchenglunwen/2460508.html
最近更新
教材专著