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Type: Artigo de periódico
Title: Low energy positron scattering by SF6 and CO2
Author: Sanchez, SD
Arretche, F
Varella, MTDN
Lima, MAP
Abstract: In this work we present theoretical integral (ICS) and differential (DCS) cross section calculations for low-energy positron scattering by SF6 and CO2 molecules. Our scattering wave functions were obtained with the Schwinger Multichannel Method (SMC) [6] at the static and static-plus-polarization levels of approximation. The elastic DCS were calculated over an energy interval ranging from 4eV up to 50eV for SF6 and from 1eV up to 20eV for CO2: The results show, in general, good agreement with recent experimental data [8]. We found a Ramsauer-Townsend minimum in e(+)-CO2 calculations, even though no signature of virtual state formation was observed, contrasting with the well-known case of electron scattering [17].
Country: Inglaterra
Editor: Iop Publishing Ltd
Rights: fechado
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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