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为了探明植物种子在空间搭载后发生一系列改变的原因,尤其是探寻空间辐射与突变发生的内在关联,设计了“照相定位”实验法,采用CR-39固体核径迹探测器来探测空间重离子,并利用空间重离子径迹与植物种子的相对位置,来确定被重离子击中的种子及其击中部位;同时用LiF热释光片测量种子所受的较低LET空间辐射的剂量。结果表明,“照相定位”法简便易行,经济实用,并极大地缩短镜下分析时间;最终测得空间重离子注量率为4.44个/cm2.d,种子所受较低LET空间辐射的平均剂量为4.79mGy。
In order to find out the reasons why plant seeds undergo a series of changes after they are spatially loaded, especially to explore the inherent relationship between space radiation and mutation, a “photographic localization” experiment was designed. CR-39 solid nuclear track detector Detection of heavy ions in space and the use of space heavy ion trajectory and the relative position of plant seeds to determine the heavy ions hit the seeds and their hits; Simultaneous LiF thermophilic measurement of the seeds suffered lower LET space Radiation dose. The results showed that the method of “photographic localization” was simple, economical and practical, and greatly shortened the time of microscopic analysis. The final measured heavy ion fluence rate was 4.44 seeds / cm2.d, and the seed suffered lower LET space The average radiation dose was 4.79 mGy.