Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches
Positron scattering by beryllium atoms in the low-energy range (≤4.0 eV) was studied within ab initio and semiempirical frameworks. When interpreting the static dipole polarizability and the scattering length as representative quantities of the target and positron–atom correlations, the scattering o...
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MDPI AG
2023-01-01
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| 丛编: | Atoms |
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| 在线阅读: | https://www.mdpi.com/2218-2004/11/1/8 |
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| author | Marcos V. Barp Wagner Tenfen Felipe Arretche |
| author_facet | Marcos V. Barp Wagner Tenfen Felipe Arretche |
| author_sort | Marcos V. Barp |
| collection | DOAJ |
| description | Positron scattering by beryllium atoms in the low-energy range (≤4.0 eV) was studied within ab initio and semiempirical frameworks. When interpreting the static dipole polarizability and the scattering length as representative quantities of the target and positron–atom correlations, the scattering observables obtained in the ab initio calculation were extrapolated by applying a semiempirical approach. Our results ratify previous ones, since no Ramsauer minimum structures or shape resonances were found in the cross sections. The presence of a (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>e</mi><mo>+</mo></msup><mo>,</mo><mi>B</mi><mi>e</mi></mrow></semantics></math></inline-formula>) bound state was also identified as a function of the dipole polarizability. |
| first_indexed | 2024-03-09T13:37:29Z |
| format | Article |
| id | doaj.art-cbb70c3725b2490084aff335e4fe0aac |
| institution | Directory Open Access Journal |
| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-09T13:37:29Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atoms |
| spelling | doaj.art-cbb70c3725b2490084aff335e4fe0aac2023-11-30T21:10:49ZengMDPI AGAtoms2218-20042023-01-01111810.3390/atoms11010008Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical ApproachesMarcos V. Barp0Wagner Tenfen1Felipe Arretche2Physics Department, Universidade Federal de Santa Catarina, Florianópolis 88040-900, Santa Catarina, BrazilPhysics Department, Universidade Federal de Pelotas, Pelotas 96010-900, Rio Grande do Sul, BrazilPhysics Department, Universidade Federal de Santa Catarina, Florianópolis 88040-900, Santa Catarina, BrazilPositron scattering by beryllium atoms in the low-energy range (≤4.0 eV) was studied within ab initio and semiempirical frameworks. When interpreting the static dipole polarizability and the scattering length as representative quantities of the target and positron–atom correlations, the scattering observables obtained in the ab initio calculation were extrapolated by applying a semiempirical approach. Our results ratify previous ones, since no Ramsauer minimum structures or shape resonances were found in the cross sections. The presence of a (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>e</mi><mo>+</mo></msup><mo>,</mo><mi>B</mi><mi>e</mi></mrow></semantics></math></inline-formula>) bound state was also identified as a function of the dipole polarizability.https://www.mdpi.com/2218-2004/11/1/8elastic scatteringpositron scatteringab initiosemiempirical potentialsscattering lengthpolarizability |
| spellingShingle | Marcos V. Barp Wagner Tenfen Felipe Arretche Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches Atoms elastic scattering positron scattering ab initio semiempirical potentials scattering length polarizability |
| title | Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches |
| title_full | Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches |
| title_fullStr | Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches |
| title_full_unstemmed | Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches |
| title_short | Many-Body and Single-Body Low-Energy Elastic Positron Scattering by Beryllium Atoms: From Ab Initio to Semiempirical Approaches |
| title_sort | many body and single body low energy elastic positron scattering by beryllium atoms from ab initio to semiempirical approaches |
| topic | elastic scattering positron scattering ab initio semiempirical potentials scattering length polarizability |
| url | https://www.mdpi.com/2218-2004/11/1/8 |
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