Cross sections for electron collision with pyridine [C$_{5}$H$_{5}$N] molecule
| Autor: | Natalia Tańska, Elżbieta Ptasińska-Denga, Bożena Żywicka, Czesław Szmytkowski, Paweł Możejko, Sylwia Stefanowska |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Chemical Physics (physics.chem-ph)
Range (particle radiation) Materials science 010304 chemical physics Biophysics FOS: Physical sciences 010402 general chemistry Condensed Matter Physics Ring (chemistry) 01 natural sciences Molecular physics 0104 chemical sciences chemistry.chemical_compound Electric dipole moment chemistry Ionization Physics - Chemical Physics 0103 physical sciences Pyridine Molecule Physical and Theoretical Chemistry Benzene Molecular Biology Electron scattering |
| Popis: | The absolute grand-total cross section (TCS) for electron scattering from pyridine, C$_{5}$H$_{5}$N, molecules has been measured at impact energies from 0.6 to 300 eV in the linear electron-transmission experiment. The obtained TCS energy dependence appears to be typical for targets of high electric dipole moment; the cross section generally decreases with rising energy, except for the 3-20 eV range, where a broad enhancement peaked near 8.5 eV is clearly visible. Below 10 eV, some weak structures which can be attributed to resonant scattering processes are also discernible. The present TCS energy dependence is compared with TCS experimental data obtained recently for energies above 13 eV by Traore Dubuis et al. [26]. The TCS for pyridine has been confronted with TCS for benzene to search how the replacement of the CH group in the benzene ring with the nitrogen atom influences the electron scattering process. In addition, for pyridine and its halogenated derivatives: 2-chloropyridine [2-C$_{5}$H$_{4}$ClN] and 2-bromopyridine [2-C$_{5}$H$_{4}$BrN], integral elastic (ECS) and ionization (ICS) cross sections have been calculated at intermediate and high electron-impact energies within semiempirical approaches. For pyridine the sum of ECS and ICS is in reasonable agreement with the measured TCS above 40 eV. 18 pages, 5 figures, 2 tables |
| Databáze: | OpenAIRE |
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