Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment

Abstract : Providing experimental values for absolute Dissociative Electron Attachment (DEA) cross sections for nucleobases at realistic biological conditions is a considerable challenge. In this work, we provide the temperature dependence of the cross section, σ, of the dehydrogenated thymine anion (T − H)− produced via DEA. Within the 393-443 K temperature range, it is observed that σ varies by one order of magnitude. By extrapolating to a temperature of 313 K, the relative DEA cross section for the production of the dehydrogenated thymine anion at an incident energy of 1 eV decreases by 2 orders of magnitude and the absolute value reaches approximately 6 × 10−19 cm2. These quantitative measurements provide a benchmark for theoretical prediction and also a contribution to a more accurate description of the effects of ionizing radiation on molecular medium.
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Article dans une revue
Journal of Chemical Physics, 2015, 142, pp.174303. 〈10.1063/1.4919638〉
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http://hal.in2p3.fr/in2p3-01155118
Contributeur : Dominique Girod <>
Soumis le : mardi 26 mai 2015 - 10:59:36
Dernière modification le : jeudi 15 mars 2018 - 11:40:09

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J. Kopyra, H. Abdoul-Carime. Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment. Journal of Chemical Physics, 2015, 142, pp.174303. 〈10.1063/1.4919638〉. 〈in2p3-01155118〉

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