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Host institution: Centre Universitaire Paris-Sud, Paris(FR)
Subject of this short term scientific mission was experimental study of the reaction of C3N- ions with neutral acetylene molecules:
C3N- + C2H2 → CN- + C5H2 (1a),
C2H- + HC3N (1b),
C5N- + H2 (1c).
This reaction is important due to its potential relevance to the chemistry of cold interstellar clouds and its abundance in the atmosphere of Saturn’s moon Titan.
The CERISES apparatus that is a disposition is the laboratory of Christian Alcaraz at Centre Universitaire Paris-Sud was used for this project. As a part of STSM, experimental facilities were modified for reactions with negative ions.
The absolute cross-section value of C2H- ions formation in the of range collision energy 0.1 – 20 eV was measured. Results for production of C2N- ions (equation 1b) obtained during this short term scientific mission are in a good agreement with previous (relative) experimental data measured in the laboratory in Prague.