Track effects in the radiolysis of aromatic liquids

详细信息    查看全文

• 作者：Jay A. LaVerne ; Aliaks ; r Baidak
• 关键词：Organic radiolysis ; LET ; H2 production
• 刊名：Radiation Physics and Chemistry
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：81
• 期：9
• 页码：1287-1290
• 全文大小：186 K

文摘

The chemical effects induced by the track structure of heavy ions have been exploited to show that H₂ production in the radiolysis of simple aromatic liquids (benzene, pyridine, toluene and aniline) is primarily due to second order processes. Similar dependences of H₂ yields on the linear energy transfer, LET, for each of these compounds suggest a common mechanism for H₂ formation. Furthermore, the yields of H₂ are significant at very high LET and they approach that found with aliphatic compounds. Yields of ¡°dimers¡± (biphenyl, bibenzyl, dipyridyl, and diphenylamine for benzene, toluene, pyridine, and aniline, respectively) have different dependences on LET reflecting the variety of pathways leading to their production. Bibenzyl formation in toluene exhibits a complex dependence on LET suggesting several competing pathways for its production whereas biphenyl formation in benzene is nearly independent of LET suggesting a unimolecular process. Dipyridyl, and diphenylamine yields in pyridine and aniline, respectively, decrease with increasing LET, which indicates that their precursor is being depleted.