摘要
本文比较分析了三种x射线源(^(55)Fe、^(238)Pu和x光管)对木材进行微密度测定的精度,并对不同树种木材的质量衰减系数进行了测定和研究。
BY using direct scanning method, the accuracy of wood microdensitometry with 3 kinds of x-ray source ((55)~Fe, (238)~Pu and x-ray tube) was studied and the Variation of mass attenuation coefficients of 4 species of wood was determined and analized The measurement with (55)~Fe and x-ray tube was found more accurate than that with (238)~Pu because the x-ray energy of the formers is closer to the optimal one than the latter A certain degree of variation of wood mass attenuation coefficienat among species and within a species was showed in the tests, which should be considered as high accuracy of the measurement is expected
出处
《木材工业》
北大核心
1990年第4期33-37,共5页
China Wood Industry
关键词
木材
微密度
测定
X射线
X-ray microdensitometry
Wood density
Wood density variation
Microdensitometrical characteristics
Mass attenuation coefficient
