Zobrazeno 1 - 10 of 69 pro vyhledávání: '"Kamil Fedus"'
1
Akademický článek
Virtual and bound states in low-energy positron scattering by atoms and molecules via modified effective range theory
Autor: Kamil Fedus, Grzegorz Karwasz
Publikováno v: Journal of Physics Communications, Vol 8, Iss 4, p 045005 (2024)
Modified effective range theory is applied as a tool to determine bound and virtual state energies in low-energy positron elastic scattering by atoms and molecules. This is achieved by the S-matrix continuation into the complex momentum plane, allowi
Externí odkaz: https://doaj.org/article/89c288f34a14487fb9404da91941ba36
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2
Akademický článek
Total Cross Sections for Electron and Positron Scattering on Molecules: In Search of the Dispersion Relation
Autor: Fabio Carelli, Kamil Fedus, Grzegorz Karwasz
Publikováno v: Atoms, Vol 9, Iss 4, p 97 (2021)
More than one hundred years of experimental and theoretical investigations of electron scattering in gases delivered cross-sections in a wide energy range, from few meV to keV. An analogy in optics, characterizing different materials, comes under the
Externí odkaz: https://doaj.org/article/285195d24f974e4eb64eaaf7c8033119
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3
Akademický článek
Elastic Scattering of Slow Electrons by Noble Gases—The Effective Range Theory and the Rigid Sphere Model
Autor: Kamil Fedus
Publikováno v: Atoms, Vol 9, Iss 4, p 91 (2021)
We report on an extensive semi-empirical analysis of scattering cross-sections for electron elastic collision with noble gases via the Markov Chain Monte Carlo-Modified Effective Range Theory (MCMC−MERT). In this approach, the contribution of the l
Externí odkaz: https://doaj.org/article/19ac9cc04d20476bad8bc709569eb88f
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4
Positron lifetime spectroscopy of defect structures in Cd1–x Zn x Te mixed crystals grown by vertical Bridgman–Stockbarger method
Autor: Agnieszka Kierys, Radosław Zaleski, Karol Strzałkowski, Marek Gorgol, Daniel Kamiński, Kamil Fedus
Publikováno v: Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials. 77:515-525
Positron annihilation lifetime spectroscopy was used to examine grown-in defects in Cd1–x Zn x Te mixed crystals as a function of Zn content (x = 0, 0.07, 0.11, 0.49, 0.9, 0.95, 1) and measuring temperature. All samples were prepared using the high
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::735605e0aa0bab52b848f02fbb838499
https://doi.org/10.1107/s2052520621004728
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6
Ramsauer–Townsend minimum in electron scattering from CF$$_4$$: modified effective range analysis
Autor: Kamil Fedus, Grzegorz P. Karwasz
Publikováno v: The European Physical Journal D. 75
Abstract Elastic cross sections for electron scattering on tetrafluoromethane (CF$$_4$$ 4 ) from 0 up to 5 eV energy are analyzed using semi-analytical approach to the modified effective range theory (MERT). It is shown that energy and angular variat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::142e67ea62eab3d335e7d9689871beaa
https://doi.org/10.1140/epjd/s10053-021-00083-x
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9
Nonlinear optical characterization of Disperse Orange 3
Autor: Hongzhen Wang, Kamil Fedus, Georges Boudebs, Christophe Cassagne, Beata Derkowska-Zielinska
Publikováno v: Optical Materials
Optical Materials, Elsevier, 2017, 72, pp.545-548. ⟨10.1016/j.optmat.2017.06.055⟩
The nonlinear optical responses of Disperse Orange 3 (DO3) dissolved in tetrahydrofuran (THF) with different concentrations were investigated by Z-scan D4σ technique employing 12 ps and 17 ps pulses of Nd:YAG laser at 532 nm and 1064 nm, respectivel
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8080607fe9ff4b55c10b20fee140ec48
https://doi.org/10.1016/j.optmat.2017.06.055
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10
Binary-encounter dipole model for positron-impact direct ionization
Autor: Kamil Fedus, Grzegorz P. Karwasz
Publikováno v: Physical Review A. 100
In the present work we study the applicability of the binary-encounter-dipole (BED) model and its simpler version the binary-encounter-Bethe model for positron-impact direct ionization. We show that ignoring the exchange and interference effects in t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ac4abf16b8039f1dfbf4db5cd5267a0
https://doi.org/10.1103/physreva.100.062702
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