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http://hdl.handle.net/1843/62220| Type: | Artigo de Periódico |
| Title: | Positron elastic scattering from alkaline earth targets |
| Authors: | Luis Argel Poveda Calviño Denise da Costa Assafrão de Lima José Rachid Mohallem |
| Abstract: | A previously reported model potential approach [Poveda et al., Phys. Rev. A 87, 052702 (2013)] was extended to study low energy positron elastic scattering from beryllium and magnesium. The cross sections were computed for energies ranging from 10-5 eV up to well above the positronium formation threshold. The present results are in good agreement with previous reports, including the prediction of a p-wave resonance in the cross section for magnesium. The emergence of this shape resonance is connected to a trend observed in the evolution of the partial wave cross section in going from Be to Mg target. This trend lead us to speculate that a sharp d-wave resonance should be observed in positron elastic scattering from calcium. The positron-target binding energies are investigated in detail, both using the scattering information and by direct computation of the bound state energies using the model potentials. |
| Subject: | Positrons |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1140/epjd/e2016-70120-y |
| URI: | http://hdl.handle.net/1843/62220 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | https://link.springer.com/article/10.1140/epjd/e2016-70120-y |
| metadata.dc.relation.ispartof: | The European Physical Journal D |
| Appears in Collections: | Artigo de Periódico |
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