Dissociative excitation study of iron pentacarbonyl molecule

Anita Ribar; Marián Danko; Juraj Országh; Filipe Ferreira da Silva; Ivo Utke; Štefan Matejčík

doi:10.1140/epjd/e2015-50755-x

2022 Impact factor 1.8

Atomic, Molecular, Optical and Plasma Physics

Topical Issue: Elementary Processes with Atoms and Molecules in Isolated and Aggregated States. Guest editors: Friedrich Aumayr, Bratislav Marinkovic, Štefan Matejčík, John Tanis, Kurt H. Becker

This article has an erratum: [https://doi.org/10.1140/epjd/e2015-60271-8]

Eur. Phys. J. D (2015) 69: 117
https://doi.org/10.1140/epjd/e2015-50755-x

Regular Article

Dissociative excitation study of iron pentacarbonyl molecule ^*

Anita Ribar¹^,2, Marián Danko¹, Juraj Országh¹, Filipe Ferreira da Silva³, Ivo Utke⁴ and Štefan Matejčík¹^a

¹ Department of Experimental Physics, Comenius University Bratislava, Mlynská dolina F2, 842 48 Bratislava, Slovakia
² Institute for Ion Physics and Applied Physics, University of Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria
³ Centre of Physics and Technological Research, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
⁴ Empa – Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland

^a e-mail: matejcik@fmph.uniba.sk

Received: 15 October 2014
Received in final form: 26 January 2015
Published online: 23 April 2015

Abstract

The processes of dissociative excitation (DE) and dissociative ionisation with excitation (DIE) of iron pentacarbonyl, Fe(CO)₅, have been studied using a crossed electron-molecule beam experimental apparatus (Electron Induced Fluorescence Apparatus, EIFA). Using EIFA we were able to record the emission spectrum of the molecule in the UV-VIS range, as well as the photon efficiency curves initiated by electron impact. The emission spectrum of Fe(CO)₅ initiated by impact of 50 eV electrons was recorded in the spectral range between 200 nm and 470 nm. It shows a high density of emission lines and bands (mainly iron lines and carbonyl bands). Additionally, we have measured photon efficiency curves (PECs) as a function of the electron impact energy for several lines and bands. On the basis of the PECs we have discussed the reaction mechanism and the energetics of the reactions associated with the DE and DIE processes.

Contribution to the Topical Issue “Elementary Processes with Atoms and Molecules in Isolated and Aggregated States”, edited by Friedrich Aumayr, Bratislav Marinkovic, Štefan Matejčík, John Tanis and Kurt H. Becker.

© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015