H2 formation from Polycyclic Aromatic Hydrocarbon molecules

29th International Conference on Photonic, Electronic, and Atomic Collisions

Chen, T.^1 ; Gatchell, M.^1 ; Stockett, M.H.^1 ; Delaunay, R.^2,3 ; Domaracka, A.^2 ; Micelotta, E.R.^4 ; Tielens, A.G.G.M.^5 ; Rousseau, P.^2,3 ; Adoui, L.^2,3 ; Huber, B.A.^2 ; Schmidt, H.T.^1 ; Cederquist, H.^1 ; Zettergren, H.^1

Department of Physics, Stockholm University, Stockholm

SE-10691, Sweden^1

CIMAP, UMR 6252, CEA/CNRS/ENSICAEN/Université de Caen Basse-Normandie, bd Henri Becquerel, BP 5133, Caen Cedex 05

F-14070, France^2

Université de Caen Basse-Normandie, Esplanade de la Paix, Caen

F-14032, France^3

Université Paris Sud, Institut d'Astrophysique Spatiale, UMR 8617, Orsay

91405, France^4

Leiden Observatory, Leiden University, PO Box 9513, Leiden

2300 RA, Netherlands^5

关键词: Electronic stopping;    Ion temperature;    keV ions;    Polycyclic aromatic hydrocarbon (PAH);    Transition state energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032081/pdf
DOI  :  10.1088/1742-6596/635/3/032081

来源: IOP

【 摘 要 】

In this work we study statistical fragmentation of Polycyclic Aromatic Hydrocarbon (PAH) molecules following collisions with keV ions. Dissociation and transition state energies for H- and H2-emissions from PAHs have been calculated and a simple electronic stopping model has been used to calculate collision-induced internal PAH temperatures. We find that H2may be formed efficiently from pristine PAHs for internal ion temperatures above 2200 K.