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Theoretical Study of Atomic Excitation by Impact of Protons in the Variational Formalism

100%
El Houda Benmansour N., Bouamoud M., Sahlaoui M.
Acta Physica Polonica A
|
2016
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vol. 130
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issue 1
145-146
EN
Schwinger's variational principle is used to evaluate excitation cross-sections of hydrogen atom by proton impact in a range of energies excluding a pertubative treatment. To describe the strong coupling between the excitation and the capture channels that exists at low energies, the continuum states have been introduced in the total wave function. Our results show that these states can describe properly the projectile capture states.
2
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Comparison of Experimental and Theoretical Double Differential Cross Sections of CH₄ at 250 eV Impact Energy

64%
Isik N., Yavuz M., Aksoy E., Ozer Z., Ulu M., Sahlaoui M., Boumediene L., Bouamoud M., Dogan M.
Acta Physica Polonica A
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2015
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vol. 127
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issue 4
1112-1114
EN
In this study, experimental and theoretical double differential cross section (DDCS) data for methane-electron interaction mechanism after the impact of a 250 eV electron have been comprehensively determined for a wide energy range of the detected electron, from 50 to 225 eV. The first Born-One Coulomb wave modeling with Gamow factor has been calculated to analyze experimental DDCS results for a correct description of the electron impact ionization of methane molecule. It is found that these theoretical calculations are successful to describe the post-collision interaction effects due to the Coulomb long-range interaction between the outgoing electrons in the final state. A considerable agreement is found between experimental and theoretical results.
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