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|Type:||Artigo de periódico|
|Title:||Progress With The Schwinger Multichannel Method In Positron-molecule Scattering|
|Author:||De Carvalho C.R.C.|
Da Silva E.P.
|Abstract:||We report calculations for low-energy positron-C2H2 and -N2 scattering obtained through the Schwinger multichannel method (SMC). Integral and differential cross-sections and the annihilation parameter, Zeff, are presented. For nitrogen, evidence of a Ramsauer-Townsend minimum and the possibility of overcorrelation in the scattering configuration space are discussed. Annihilation probability densities (APD) calculated for He and H2 seem to bring indirect support to a model previously proposed to explain why acetylene, unlike nitrogen, presents very high low-energy annihilation rates.|
|Editor:||Elsevier Science Publishers B.V., Amsterdam, Netherlands|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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