DIFFUSION OF RADON THROUGH NUCLEAR TRACK MICROFILTERS

被引：0
|
作者：
HUSSAIN, G [1 ]
QURESHI, AA [1 ]
KHAN, HA [1 ]
ZAFAR, MS [1 ]
机构：
[1] PUNJAB UNIV,DEPT PHYS,LAHORE,PAKISTAN
来源：
NUCLEAR TRACKS AND RADIATION MEASUREMENTS | 1993年 / 22卷 / 1-4期
关键词：
TRACK ETCH MICROFILTERS; MEMBRANES; DIFFUSION; RADON; ACTIVATION ENERGY; LASER;
D O I：
10.1016/0969-8078(93)90208-L
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Nuclear track microfilters prepared by irradiating CN-85 cellulose nitrate detectors with Cf-252 in 2 pi geometry were given post-irradiation thermal annealing and ultraviolet treatments followed by etching. These filters were employed to investigate the diffusion of radon. Alpha particles produced due to the decay of radon and its daughters were registered and etched electrochemically in lexan polymeric detectors. Experimental findings have led to determine diffusion coefficient and activation energy for diffusion through various filters/membranes. Diffusion coefficient of radon through the filter treated with UV from the laser is (1.8+/-0.05) 10(-4) cm2 sec-1, being a maximum value as compared to other filters and membranes. CorresPonding activation energy for diffusion bears a minimum value of (0.018+/-0.001) eV for this filter. It can be speculated that the Post-irradiation laser exposure modifies the profiles of the pores which reduce the resistance to the flow of radon.
引用
收藏
页码：911 / 915
页数：5
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