학술논문
Cq+-induced excitation and fragmentation of uracil: effects of the projectile electronic structure
Document Type
Article
Author
Source
Journal of Physics B: Atomic, Molecular and Optical Physics; November 2002, Vol. 35 Issue: 21 p4373-4381, 9p
Subject
Language
ISSN
09534075; 13616455
Abstract
Ionization and fragmentation of the RNA base uracil (C4H4N2O2) by means of Cq+ ions (q &equal; 1 6) has been studied for ion kinetic energies ranging from 2 to 120 keV. Whereas for Cq+ (q &equal; 1 , 3, 4, 5, 6) very similar fragmentation yields are observed which increase with the projectile velocity v , C2+ ions not only induce a fundamentally different fragmentation pattern but also lead to a decrease of fragmentation with ion velocity v . At low velocities, even almost complete fragmentation is observed. Our findings can be explained by differences in the electronic structures of the Cq+ ions as well as by employing the electronic stopping model previously applied to ionfullerene interactions.