Cross sections for electron collision with pyridine [C5H5N] molecule

The absolute grand -total cross section (TCS) for electron scattering from pyridine, C5H5N, 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 reported very recently. Comparison with TCS for benzene is also made 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-C5H4ClN] and 2-bromopyridine [2-C5H4BrN], integral elastic (ECS) and ionisation (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.

Keywords

ELECTRON SCATTERING PYRIDINE RESONANT ELECTRON SCATTERING TOTAL CROSS SECTION

Publication year

Publication language

angielski

Journal title / conference title

MOLECULAR PHYSICS

Publication country

Wielka Brytania

Page numbers [from-to]

395 - 403

Author (6)







Organization unit


Katedra Fizyki Atomowej, Molekularnej i Optycznej

Faculty

I Liceum Ogólnokształcące im. Mikołaja Kopernika w Gdańsku
Wydział Fizyki Technicznej i Matematyki Stosowanej