Project

Back to overview

Chemical and Physical Processes from Electron-Molecule Interactions

English title Chemical and Physical Processes from Electron-Molecule Interactions
Applicant Allan Michael
Number 131962
Funding scheme Project funding (Div. I-III)
Research institution Département de Chimie Université de Fribourg
Institution of higher education University of Fribourg - FR
Main discipline Physical Chemistry
Start/End 01.10.2010 - 31.12.2012
Approved amount 325'109.00
Show all

Keywords (11)

electron-molecule scattering; spectroscopy and reactivity of transient anions; processes in low pressure plasmas; electron-molecule cross sections; electron-driven chemistry; plasma chemistry; electron scattering; elastic scattering; vibrational excitation; dissociative electron attachment; resonances

Lay Summary (English)

Lead
Lay summary
LeadChemical and physical processes induced by free electrons play a key role in a number of natural and technological environments, such as planetary atmospheres and comets, semiconductor manufacture, radiotherapy of cancer and many more. The present project provides the fundamental knowledge needed to understand and optimize these applications. SummaryThe project aims at measurement of basic physical and chemical processes induced by an attachment of a free electron to a molecule or an atom. The molecules and atoms are chosen by relevance to plasma processing, lighting, atmospheric and space chemistry, radiation damage to living tissue, fusion plasma, electron-induced processes at an STM tip, and by pure scientific interest. The latter concerns particularly new resonant phenomena near threshold and in the backward scattering, in scattering with complex molecules, and in collaborations with current development of scattering theory. Emphasis is on advanced custom-built instrumentation, permitting the measurement of high-quality quantitative (absolute) cross sections for elastic scattering, vibrational and electronic excitation, and dissociative electron attachment. Development of new instrumentation to reach this goal is pursued.GoalThe goals are:1.Development and improvement of instruments to measure the electron-molecule processes.2.Providing accurate quantitative data (cross sections) for the molecules and processes of interest in other disciplines of science and technology (including theory).3.Discovery of new phenomena in electron-molecule collisions.RelevanceThe research is a part of international effort in the field of electron collisions. The results are used by several theoretical groups to inspire and validate advanced theoretical methods and models. The experimental and theoretical data are in turn used in models of plasmas and planetary atmospheres. They also provide gas phase reference data permitting deeper insight into electron-driven processes in the condensed phase, such as living tissue and electron-driven material processing.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
The electronic structure of TEMPO, its cation and anion
Kubala Dusan, Regeta Khrystyna, Janeckova Radmila, Fedor J., Grimme S., Hansen A., Nesvadba P., Allan M. (2013), The electronic structure of TEMPO, its cation and anion, in Molecular Physics, n/a, 1-8.
Vibrational excitation of cyclopropane by electron impact: An experimental test of the discrete-momentum-representation theory with density-functional-theory approximation of polarization and correlat
Čurík Roman, Čársky Petr, Allan Michael (2012), Vibrational excitation of cyclopropane by electron impact: An experimental test of the discrete-momentum-representation theory with density-functional-theory approximation of polarization and correlat, in Phys. Rev. A, 86, 062709-1-062709-5.
Measuring and modeling absolute data for electron-induced processes
Allan Michael (2012), Measuring and modeling absolute data for electron-induced processes, in J. Phys. Conf. Proc., 388, 012001/1-012001/13.
Disentanglement of triplet and singlet states of azobenzene: Direct EELS detection and QMC modeling
Dubecký M., Derian R., Horváthová L., Allan M., Stich I. (2012), Disentanglement of triplet and singlet states of azobenzene: Direct EELS detection and QMC modeling, in Phys. Chem. Chem. Phys., 13, 20939-20945.
Fundamentals of interactions of electrons with molecules
Moore John H., Swiderek Petra, Matejcik Stefan, Allan Michael (2012), Fundamentals of interactions of electrons with molecules, in P. Russell, I. Utke, S. Moshkalev (ed.), Oxford University Press, London, chapter 4.
Dissociative electron attachment to Pt(PF3)4 – a precursor for Focused Electron Beam Induced Processing (FEBIP)
May Olivier, Kubala Dušan, Allan Michael (2012), Dissociative electron attachment to Pt(PF3)4 – a precursor for Focused Electron Beam Induced Processing (FEBIP), in PCCP, 14(9), 2979-2982.
Measurement of Absolute Cross Sections of Electron Scattering by Isolated Molecules
Allan M. (2011), Measurement of Absolute Cross Sections of Electron Scattering by Isolated Molecules, in Roman Čurík, Petr Čársky (ed.), Taylor & Francis Books, Boca Raton, chapter 3.
Electron impact vibrational excitation of carbon monoxide in the upper atmospheres of Mars and Venus
Campbell L., Allan M., Brunger M. (2011), Electron impact vibrational excitation of carbon monoxide in the upper atmospheres of Mars and Venus, in J. Geophys. Res., 116, A09321.
Absolute angle-differential elastic cross sections for electron collisions with diacetylene
Allan Michael, Winstead Carl, McKoy Vincent (2011), Absolute angle-differential elastic cross sections for electron collisions with diacetylene, in Phys. Rev. A, 83(6), 062703/1-062703/5.
Electron scattering in Pt(PF3)4: elastic scattering, vibrational and electronic excitation
Allan Michael (2011), Electron scattering in Pt(PF3)4: elastic scattering, vibrational and electronic excitation, in J. Chem. Phys., 134(20), 204309/1-204309/9.
Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene
Allan M., May O., Fedor J., Ibanecsu B. C., Andric L. (2011), Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene, in Phys. Rev. A, 83(5), 052701/1-052701/9.
High-resolution experiments and B-spline R-matrix calculations for elastic scattering from krypton
Zatsarinny Oleg, Bartschat K., Allan M. (2011), High-resolution experiments and B-spline R-matrix calculations for elastic scattering from krypton, in Phys. Rev. A, 83(3), 032713/1-032713/5.
Electron impact excitation of the 4p55s states in krypton: high-resolution electron scattering experiments and B-spline R-matrix calculations
Allan Michael, Zatsarinny Oleg, Bartschat Klaus (2011), Electron impact excitation of the 4p55s states in krypton: high-resolution electron scattering experiments and B-spline R-matrix calculations, in J. Phys. B: At., Mol. Opt. Phys., 44(6), 065201/1-065201/7.

Scientific events

Associated projects

Number Title Start Funding scheme
121841 Chemical and Physical Processes from Electron-Molecule Interactions 01.10.2008 Project funding (Div. I-III)
144367 Chemical and Physical Processes from Electron-Molecule Interactions 01.01.2013 Project funding (Div. I-III)

Abstract

Measurement of basic physical and chemical processes induced by an attachment of a free electron to a molecule or an atom. The molecules and atoms are chosen by relevance to plasma processing, lighting, atmospheric and space chemistry, radiation damage to living tissue, fusion plasma, electron-induced processes at an STM tip, and by pure scientific interest. The latter concerns particularly new resonant phenomena near threshold and in the backward scattering, in scattering with complex molecules, and in collaborations with current development of scattering theory. Emphasis is on advanced custom-built instrumentation, permitting the measurement of high-quality quantitative (absolute) cross sections for elastic scattering, vibrational and electronic excitation, and dissociative electron attachment. Improvement of instrumentation developed to reach this goal is pursued.
-