摘要
本文简要论述β薄膜与纸张定量原理。重点论述温度补偿的重要性，并用气态方程式推导温度补偿的计算过程和温度实验结果，效果是非常好的。本文也论述了物质对多能β射线的吸收系数μ值不是常数，而是随被测物增厚而变大。介绍了在线测量时用查表法寻找对应μ值的方法。并简要介绍了纸张定量用红外线测定水分的方法以及用单片微机８０９８构成β薄膜和纸张定量装置和实现闭环控制。
This paper briefly explains the principles of β plastic film and paper quantification. The importance of temp-erature compensation is discussed in detail.Computation of temperature compensation is deduced from the gas e-quation,and the result of temperature experiment is quite good. The value of material's absorb coefficient μ tomultiple energy β rays is,instead of being constant, incrrasing with the material's thick ness, as discussed in thispaper.The article also presents a method of finding the value of μ through a table during on-line measurement.Finally, the method of measuring moisture by infrated ray is used in paper quantification. The device of β plasticfilm and paper quantification is implemented with a single-chip microprocessor 8098 to make close-loop control.(
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
1996年第2期102-108,共7页
Nuclear Electronics & Detection Technology
关键词
β薄膜
纸张定量
β吸收系统
红外线
厚度
plastic film and paper quantification Temperture compensation β absorb coefficient Infrared ray)
