α粒子在玻璃纤维滤纸中自吸收的实验研究  

Study on Self-absorption of Alpha Particles in a Fiberglass Filter

作　　者：傅翠明[1] 张志龙[1] 李爱武[1] 李静韬[1] 

机构地区：[1]中国辐射防护研究院,山西太原030006

出　　处：《原子能科学技术》2003年第4期368-371,共4页Atomic Energy Science and Technology

摘　　要：对采样在玻璃纤维滤纸上的α气溶胶粒子进行分层测量,得出α粒子在滤纸中随质量厚度的沉积分布规律,进而求得了沉积分布函数。用不同质量厚度的玻璃纤维滤纸测出α粒子损失与质量厚度的关系,得出了损失率函数。通过损失率函数与沉积分布函数估算出了一定实验条件下α粒子在最大质量厚度为6 7mg·cm-2的玻璃纤维滤纸中的自吸收系数。对实验结果及相关问题进行了讨论。By dividing the fiberglass filter into several layers with different mass thickness, the deposition distribution of α particles sampled in the filter is measured and the relation of the deposition with mass thickness is obtained. The loss rate of detection of α particles with the mass thickness of the filter is measured too, and the selfabsorption of α particles in the filters is determined. The selfabsorption efficiency of α particles in the fiberglass filter with the maximum thickness of 6.7 mg·cm-2 is given. The problems in the test are discussed.

关 键 词：Α粒子 玻璃纤维滤纸 自吸收 分层测量 沉积 质量厚度 损失 

分 类 号：O572.353[理学—粒子物理与原子核物理]