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	A simple approach to determine the diffusivity of americium in granite
	Song, L. ; Feng, X. ; Liang, J. ; Zhang, Y. ; Wang, J.
	2010-10-12 ; 2010-10-12
关键词	Diffusivity Americium Phosphor imaging Autoradiography Grind Rock Chemistry, Inorganic & Nuclear Nuclear Science & Technology
中文摘要	The diffusivities of the key radionuclides in host rock are important for the performance assessment of repositories. One of the conventional methods for determining the diffusivities of radionuclides is to grind the rock tablet layer by layer and then to measure the radioactivity remaining on the rock tablet before each grinding cycle. Since grinding hard rock samples, especially those with radioactivity, is very difficult, we developed a new approach to determine the diffusivity of americium in granite. The new approach mainly includes two parts: one is to measure the radioactivities from both sides of a rock disk sample by autoradiography with phosphor imaging technique; the other is to study the relationship between the radioactivities and the apparent diffusivity of americium in granite by computer modelling. Because the high contamination risk of grinding radioactive rock samples has been avoided, the new approach is much simpler than the conventional method. It may be a better choice of measuring the diffusivities of radionuclides in rock, especially for those laboratories in which grinding radioactive rock samples is inconvenient.
语种	英语 ; 英语
出版者	OLDENBOURG VERLAG ; MUNICH ; LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79292]
专题	清华大学
推荐引用方式 GB/T 7714	Song, L.,Feng, X.,Liang, J.,et al. A simple approach to determine the diffusivity of americium in granite[J],2010, 2010.
APA	Song, L.,Feng, X.,Liang, J.,Zhang, Y.,&Wang, J..(2010).A simple approach to determine the diffusivity of americium in granite..
MLA	Song, L.,et al."A simple approach to determine the diffusivity of americium in granite".(2010).

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