【摘 要】
：
Some methods of capillary gas chromatography, such as GC,GC-MS, GC-FT-IR, are used to analyze the products of thymine irradiatedby 18O8+ion beam in N2O saturate
【机 构】
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Institute of Modern Physics
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Some methods of capillary gas chromatography, such as GC,GC-MS, GC-FT-IR, are used to analyze the products of thymine irradiatedby 18O8+ion beam in N2O saturated aqueous solution.From the results of GC-MS the molecular weight of products can be determined, and from the results of GC-FT-IRsome molecular structure information of products can be obtained.By this way the products,5,6-Dihydrothymine, 5-Hydroxyl-5-Methylhydantoin, 5-Hydroxyl-6-Hydrothymine,5-Hydro-6-Hydroxylthymine, 5-Hydroxymethyluracil, Trans-Thymine glycol,Cis-Thymine glycol and dimers are determined without separation of themfrom samples.Though these products are as same as those products of thymineirradiated by γ rays inN2O saturated aqueous solution, the mechanism of thymine irradiated by heavy ionbeam in aqueous solution is different from that by γ rays. The main productsof thymineirradiated by 18O8+ ion beam in N2O saturated aqueous solution are hydroxyl adductsat 5-6 band of thymine, while the main products of thymine irradiated by γ ray in N2Osaturated aqueous solution are dimers of thymine.
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