title: 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) cm(2). 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.
authors.affiliation: Faculty of Science, Siedlce University, 3 Maja 54, 08-110 Siedlce, Poland.
authors.forename: Janina
authors.initials: J
authors.lastname: Kopyra
authors.affiliation: Université de Lyon; Université Claude Bernard Lyon1; Institut de Physique Nucléaire de Lyon, CNRS/IN2P3 UMR 5822, 43 Bd du 11 novembre 1918, 69622 Villeurbanne Cedex, France.
authors.forename: Hassan
authors.initials: H
authors.lastname: Abdoul-Carime
mesh_terms: D000838:Anions / Q000737:chemistry; D004583:Electrons; D011312:Pressure; D013696:Temperature; D013941:Thymine / Q000737:chemistry*
chemical_list: D000838:Anions; D013941:Thymine