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Type: Artigo de periódico
Title: Low-energy positron scattering by CO(2)
Author: Sanchez, SD
Arretche, F
Lima, MAP
Abstract: In this work we present results of integral (ICS) and differential (DCS) cross sections for positron-CO(2) scattering at low incident energies. Our ICS shows a significant improvement toward the experimental data, especially below 2 eV, and all the way up to the positronium formation threshold (7.8 eV), in comparison to our previous calculations [S. d'A. Sanchez, F. Arretche, M. T. do N. Varella, and M. A. P. Lima, Phys. Scr. T110, 276 (2004)]. Our calculated DCSs show a better resemblance in shape with the quasielastic experimental points of the Detroit group [D. A. Przybyla, W. Addo-Asah, W. E. Kaupilla, C. K. Kwan, and T. S. Stein, Phys. Rev. A 60, 359 (1999)], but the agreement is still not fully satisfactory, indicating a need for further theoretical and experimental investigation.
Country: EUA
Editor: Amer Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevA.77.054703
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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