Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/77585
Type: Artigo de periódico
Title: Annihilation dynamics of positrons in molecular environments: Theoretical study of low-energy positron-C2H4 scattering
Author: daSilva, EP
Germano, JSE
Lima, MAP
Abstract: We present a theoretical study of low-energy positron-C2H4 scattering using the Schwinger multichannel method. We calculated integral cross sections and the annihilation parameter Z(eff) for positron impact energies from 0.001 to 6 eV. We have used up to 23 112 configurations in a fully a initio calculation. Our results are in excellent agreement with available experimental data. As seen experimentally, at low energies, our calculated Z(eff) and cross sections are very large. We attribute this behavior to virtual positronium formation.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.77.1028
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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