| Titre : | Schwinger variational approach to excitation of hydrogen atoms by protons impacts at intermediate energies |
| Auteurs : | LASRI Boumediene, Directeur de thèse ; Bahloul Meriem, Auteur |
| Type de document : | texte imprimé |
| Editeur : | UNIVERSITY OF SAIDA - Dr. MOULAY TAHAR Faculty of Science and Technology Department of Materials Science, 2024/2025 |
| Format : | 92 p |
| Accompagnement : | CD |
| Langues: | Anglais |
| Langues originales: | Anglais |
| Catégories : | |
| Mots-clés: | Atomic collisions ; Schwinger variational principle ; Atomic excitation ; Cross sections |
| Résumé : |
Within the framework of the impact parameter formalism, the variational approach based
on the fractional form of the Schwinger variational principle is applied to evaluate the total cross sections for the direct excitation of the hydrogen atom to the states n = 2 and n = 3 by proton (H+ ) impact. The study was conducted in the energy range from 1 keV to 200 keV, including the intermediate energy domain around 50 keV. Our theoretical predictions are in good agreement with the various available experimental results, particularly those of Park et al. and Barnett et al., as well as with several theoretical models such as TCES, POHC, UOHC, SCE, TDSE, and TCAO |
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Schwinger variational approach to excitation of hydrogen atoms by protons impacts at intermediate energies Adobe Acrobat PDF |
