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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){sup −} 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{sup −19} cm{sup 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:
 [1];  [2]
  1. Faculty of Science, Siedlce University, 3 Maja 54, 08-110 Siedlce (Poland)
  2. 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)
Publication Date:
OSTI Identifier:
22415739
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 142; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANIONS; BASES; BENCHMARKS; CROSS SECTIONS; DEHYDROGENATION; ELECTRON ATTACHMENT; EV RANGE; FRAGMENTATION; TEMPERATURE DEPENDENCE; THYMINE

Citation Formats

Kopyra, Janina, and Abdoul-Carime, Hassan, E-mail: hcarime@ipnl.in2p3.fr. Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment. United States: N. p., 2015. Web. doi:10.1063/1.4919638.
Kopyra, Janina, & Abdoul-Carime, Hassan, E-mail: hcarime@ipnl.in2p3.fr. Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment. United States. doi:10.1063/1.4919638.
Kopyra, Janina, and Abdoul-Carime, Hassan, E-mail: hcarime@ipnl.in2p3.fr. Thu . "Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment". United States. doi:10.1063/1.4919638.
@article{osti_22415739,
title = {Temperature dependence of the cross section for the fragmentation of thymine via dissociative electron attachment},
author = {Kopyra, Janina and Abdoul-Carime, Hassan, E-mail: hcarime@ipnl.in2p3.fr},
abstractNote = {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){sup −} 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{sup −19} cm{sup 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.},
doi = {10.1063/1.4919638},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 17,
volume = 142,
place = {United States},
year = {2015},
month = {5}
}