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Secondary Electron Distribution of Atmospheric Nitrogen Molecule by 350 eV Electron Impact

100%
Ozer Z., Ulu M., Dogan M.
Acta Physica Polonica A
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2016
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vol. 129
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issue 1
20-22
EN
Electron collisions with nitrogen molecules have an important role for example in ionospheric and auroral phenomena in the upper atmosphere of the Earth. These processes are important in electrical discharges involving atmospheric gases. Due to the key features electron collisions with N₂ have been under particular interest and extensively studied for last decades. Cross-section data is extremely useful in understanding the systematic of the ionization process. Since the earliest cross-section measurements of N₂, there have been a great number of improvements and new developments on theoretical and experimental methods. A crossed-beam apparatus so called electron spectrometer that has an effusive gas source and electron gun is used to obtain the cross-sections. Scattered and ejected electrons are analyzed by hemispherical electron analyzer. Here we report recent measurements of double differential cross-section for N₂ as a function of electron angle at incident electron energy of 350 eV.
2
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Existence of p-Adic Quasi Gibbs Measures for Mixed Type p-Adic Ising λ-Model

100%
Dogan M., Akin H., Mukhamedov F.
Acta Physica Polonica A
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2016
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vol. 129
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issue 4
861-864
EN
We consider nearest-neighbors and next nearest-neighbors p-adic Ising λ-model with spin values {∓ 1} on a Cayley tree of order two. First we prove that the model satisfies the Kolmogorov consistency condition and then we prove that the nonlinear equation corresponding to the model has at least two solutions in Q_{p}, where p is a prime number p ≥ 3. One of the roots is in ε_{p} and the others are in Q_{p}\ε_{p}. If the nonlinear equation has more than one non-trivial solutions for the model then we conclude that p-adic quasi Gibbs measure exists for the model.
3
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Measurement of Double Differential Cross-Section for Electron Impact Ionization of Argon at 348 eV

100%
Bozkurt G., Yavuz M., Ozer Z., Dogan M.
Acta Physica Polonica A
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2014
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vol. 125
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issue 2
343-344
EN
In this study, we report the angular distribution of double differential cross sections of ejected electrons from Ar in intermediate energy region. Double differential cross-sections for electron impact ionization of argon have been measured at 348 eV. A hemispherical energy analyzer is used to analyze the ejected electrons with energies between 25 and 325 eV and angles between 25° and 130°.
4
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Measurements of Double Differential Cross-Sections for He at Intermediate Energy

88%
Ozer Z., Olgac F., Ulu M., Aktas B., Dogan M.
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EN
Detailed studies on ionization of atoms and molecules by electron impact have made numerous contributions to understanding of the structure of atoms and molecules including the interaction between particles. After a ionizing collision a scattered electron, an ejected electron and a recoil ion is formed. Doubly differential cross-sections give detailed information for one of the outgoing electrons. In this study, we report the angular distribution of double differential cross-sections of ejected electrons from He in intermediate energy region.
5
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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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