Eur. Phys. J. D 35, 257-260 (2005)
https://doi.org/10.1140/epjd/e2005-00228-0

Temperature dependence of electron attachment to CHCl₂Br

A crossed beams study

¹ Department of Experimental Physics, Comenius University, Mlynska dolina F2, 84248 Bratislava, Slovak Republic
² Institut fuer Chemie-Physikalische und Theoretische Chemie Freie Universitaet Berlin, Takustrasse 3, 14195 Berlin, Germany

Corresponding author: ^a matejcik@fmph.uniba.sk

Received: 17 February 2005
Revised: 1 June 2005
Published online: 17 August 2005

Abstract

Dissociative electron attachment (DEA) to CHCl₂Br has been studied in a crossed electron/molecular beams experiment in the electron energy range between 0 and 8 eV and in the gas temperature range from 321 to 478 K. The two negative fragment ions Cl^- and Br^- are formed from a prominent low energy resonant feature close to zero eV and at comparatively weaker resonances at about 0.38 eV, 2.2 eV and 5.5 eV. In contrast to swarm experiments [7], the bihalogen ion Cl was not detected in our experiment. The absolute partial cross-sections for Br^- and Cl^- reaction channels have been estimated. We find that in the low electron energy range (0 eV) the overall DEA cross-section as well as the partial DEA cross-section for Br^- formation slightly decrease with increasing gas temperature whilst the partial cross-section for the Cl^- channel is temperature independent.