Double differential distribution of electron emission in ionization of uracil in collisions with fast bare C-ions: angular asymmetry

Autor: Agnihotri, A. N., Nandi, S., Kasthurirangan, S., Kumar, A., Galassi, Mariel Elisa, Rivarola, Roberto Daniel, Champion, C., Tribedi, L. C.
Jazyk: angličtina
Rok vydání: 2013
Předmět:
Zdroj: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
DOI: 10.1103/PhysRevA.87.032716
Popis: We report the energy and angular distribution of the electron emission from an RNA base molecule uracil in collisions with 3.5-MeV/u bare C ions. The absolute double differential cross sections (DDCS) are measured for emission energy between a few to 600 eV. The angular distributions are compared to those obtained for the O2 molecule in the same experiment. The single differential cross sections (SDCS) are also deduced. The energy and angular distributions of the DDCS and SDCS are compared with the state-of-the-art quantum-mechanical models based on continuum distorted wave-eikonal initial state (CDW-EIS) and correct boundary first Born (CB1) approximations which use a suitable molecular wave function for uracil. The models, however, give substantial deviations from the observed energy and angular distributions of the DDCS as well as SDCS. The CDW-EIS calculations are closer to the data compared to the CB1. In the case of uracil a large difference in the forward-backward emission of electrons was observed in comparison to that in collisions with an oxygen molecule. Fil: Agnihotri, A. N.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; India Fil: Nandi, S.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; India Fil: Kasthurirangan, S.. Institute of Chemical Technology. Department of Physics; India Fil: Kumar, A.. Bhabha Atomic Research Centre. Nuclear Physics Division; India Fil: Galassi, Mariel Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina Fil: Rivarola, Roberto Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Instituto de Física de Rosario (i); Argentina Fil: Champion, C.. Universite Paul Verlaine-metz. Institut de Physique, Chimie Et Materiaux. Laboratorie de Physique Moleculaire Et Des Collisions; Francia Fil: Tribedi, L. C.. International Centre Of Theoretical Science. Tata Institute Of Fundamental Research; India
Databáze: OpenAIRE
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