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从辐射化学的观点出发,引入辐射保护函数(F)的概念,根据云团反应的竞争机理,建立了“理想二元体系”中正子素形成几率和保护函数之间的关系式;并且,根据此关系,对正庚烷——正穴清除剂(二噁烷,三乙胺,吡咯烷)体系的I_3值及对一些阴离子(I~-,Br~-,Cl~-,S~(2-),SCN~-和F~-)水溶液中的I_3值随溶质浓度的变化进行了定量地拟合。发现,在正穴清除剂体系中,吡咯烷与其他两者相比,对正庚烷具有较大的辐射保护效应;而对阴离子水溶液体系,阴离子对水的辐射保护效应从大到小的顺序是:I~-,SCN~-,S~(2-),Br~-,Cl~-,F~-。实际上,F~-对水毫无保护作用。
From the perspective of radiation chemistry, the concept of radiation protection function (F) is introduced. According to the competition mechanism of cloud reaction, the relationship between the probability of nominin formation and the protection function in “ideal binary system” is established. Furthermore, The relationship between the I_3 value of n-heptane-orthophenol scavenger (dioxane, triethylamine, pyrrolidine) and some I_3 values for some anions (I ~, Br ~ -, Cl ~ -), SCN ~ - and F ~ -) aqueous solution I_3 value with the solute concentration was quantitatively fitted. It is found that pyrrolidine has a greater radiation protection effect on n-heptane in the scavenger system of positive hole scavenger than in the other two systems. For the anionic water solution system, the radiation protection effect of anion on water is in descending order Is: I ~ -, SCN ~ -, S ~ (2 -), Br ~ -, Cl ~ -, F ~ -. In fact, F ~ - has no protective effect on water.