| Autor: |
Magnus Rittby, Erkki J. Brändas, Nils Elander, P Krylstedt |
| Rok vydání: |
1987 |
| Předmět: |
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| Zdroj: |
Journal of Physics B: Atomic and Molecular Physics. 20:1295-1327 |
| ISSN: |
0022-3700 |
| DOI: |
10.1088/0022-3700/20/6/016 |
| Popis: |
The authors propose the use of the complex coordinate method in conjunction with a local-density, X alpha static exchange plus polarisation model for the analysis of shape resonances in electron-atom scattering with possible extension to electron-molecule collisional processes. The basic model is discussed and the X alpha formalism is briefly reviewed. The authors investigate the inclusion of polarisation and exchange terms for the study of shape resonances in electron-atom scattering. By the use of the exterior complex scaling technique, complex resonance poles of the partial-wave S matrix can be directly evaluated in the positive lower half of the complex energy plane on the second Riemann sheet. The method is illustrated by presenting numerical investigations of the e-Be and e--Mg scattering systems. The behaviour of the partial-wave cross section and its dependence on the corresponding partial-wave S-matrix poles are discussed. Furthermore, the authors examine the appearance of asymmetries in the cross section in the vicinity of the poles. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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