Electron interactions with molecules of biological interest
Author
Fuss, Martina ChristinaAdvisor
García Gómez-Tejedor, GustavoEntity
UAM. Departamento de QuímicaDate
2013-12-13Subjects
Colisiones (Física nuclear) - Electrones - Tesis doctorales; QuímicaNote
Tesis doctoral inédita. Universidad Autónoma de Madrid, Facultad de Ciencias. Fecha de lectura: 13-12-2013Rights
Atribución-NoComercial-SinDerivadas 3.0 EspañaAbstract
In this thesis, electron collisions with molecules of biological interest are investigated.
The main focus lies on the conduction of total scattering cross section and
electron energy loss measurements at different apparatuses and energy ranges
and includes the construction, testing and start of operation of a new experimental
device using a strong magnetic field for confining the electron beam during
the cross section measurements. Furthermore, theoretical electron-molecule
cross sections are derived from the optical potentials of the atomic constituents
taking into account intramolecular screening effects. The scattering targets thus
studied in the general energy range of interest (1–10 000 eV) are argon, methane,
ethylene, tetrahydrofuran, p-xylene, pyrimidine, and pyrazine.
Based on the original data obtained and aided by a critical analysis and comparison
to other relevant results, carefully selected and self-consistent electron collisional
data sets can be recommended for some of the molecules mentioned. They
are compiled from the most representative and accurate sources for each type of
interaction parameter in order to provide a complete reference describing electron
scattering from the respective molecules in the energy range 1–10 000 eV.
The tabulated data include integral partial cross sections for the different interaction
processes, differential cross sections for elastic scattering and also energy
loss distribution functions for the same range of incident energies. In addition,
an empirical approximation to inelastic differential cross sections is proposed.
Finally, a custom-programmed molecular-level Monte Carlo code, the Low-
Energy Particle Track Simulation, directly uses the data base generated for the
simulation of realistic macroscopic situations such as electron transport through
gases or medical radiation applications, adding practical utility to the scientific
results obtained.
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