摘要
应用高灵敏度、高精度、静态、累积、易于重复观测的ＣＤ—ｌａ杯测氧技术，在室内较理想条件下，进行了氡及其子体“自身”固有的运移规律与机理研究。实验发现：（１）氡及其子体在理想条件下的空气中，其纵向运移能力远大于横向运移能力，前者＞９０％，后者＜１０％；（２）氡及其子体比重很大，但其向上运移的贡献＞４５％，向下运移的贡献＜４５％；（３）氡及其子体和母体衰变放出的ａ粒子减速后之4Ｈｅ可与它们形成团簇，当其比重小于空气时，能自行上升。
By using very precise, highly sensitive, static accumulated, easily repeated CD- 1 a -cup to survey the migration rule and mechanism of radon and its daughters was studied, and significant results were obtained: (1) Under laboratory conditions, the vertical component of migration of radon and its daughters was much greater than the horizontal component, the former was over 90% and the latter was less than 10%. (2) Despite the very big specific gravity of radon and its daughters, the descending component of migration was less than 45%, while the ascending component was more than 45%. (3) After a -particles (emitted from radon and its daughters) being slowed down, 4He combined with the radon and its daughters to form clusters. When the density of the cluster was less than that of the air the self-ascending would occur.
出处
《核技术》
CAS
CSCD
北大核心
2000年第3期169-175,共7页
Nuclear Techniques
基金
国家自然科学基金!40674238
类别
A:D0409
国家及地质矿产部攻关项目
