摘要
研究了β剂量在瓷片中与深度变化的关系．这个关系是β剂量在瓷片中积累和衰减作用引起的．与瓷器热释光测定年代有关的是积累深度和积累饱和值．实验结果表明，在深度８０μｍ处，积累饱和值为１．０５．由此推算出厚度为１００μｍ的瓷片因积累而增加的平均剂量为４％，当厚度为２００μｍ时仅增加２％，当厚度为３０μｍ时平均剂量减少２％．由此可见，用这样厚度瓷片测定年代积累作用可以忽略．
The variation of beta dose- rate with depth below the surface of a porcelain slice was investigated. The variation is due to the build- up and attenuation effectS of beta dose in the slice. It is shown that the saturation value of build-up is 1.05 at the depth of 80μ m, and therefore the average dose increment or reduction is only 2% for a thickness of 200 or 300μ m. Hence the build-up effect is negligible in the dating of porcelain slices with similar thickness.
出处
《核技术》
CAS
CSCD
北大核心
1995年第8期454-457,共4页
Nuclear Techniques
关键词
热释光
测定
年代
瓷器
β剂量
积累
衰减
Thermoluminescence dating, Porcelain, βdose, Build- up, Attenuation
