Electron attachment to the DNA bases thymine and cytosine

被引：141

作者：

Denifl, S ^{[1
]}

Ptasinska, S ^{[1
]}

Cingel, M ^{[1
]}

Matejcik, S ^{[1
]}

Scheier, P ^{[1
]}

Märk, TD ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Ionenphys, A-6020 Innsbruck, Austria

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 377卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(03)01096-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electron attachment (EA) to the DNA bases thymine (T) and cytosine (C) was studied in the electron energy range from about 0 to 9 eV using a crossed electron/molecule beams technique. As uracil the dominant negative ions formed via EA reactions to T and C are (T - H)(-) (corresponding to T minus H, with a mass to charge ratio of 125) and (C - H)(-) (corresponding to C minus H with a mass to charge ratio of 110). The respective partial EA cross-sections for (T - H)(-) and (C - H)(-) could be determined yielding peak values of sigma (1.05 eV) = 1.2 x 10(19) m(2), sigma (1.54 eV) = 2.3 x 10(-10) m(2), respectively. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：74 / 80

页数：7

共 21 条

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