Ion-pair dissociation of highly excited carbon clusters, size and charge effects

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

Launoy, T.^4 ; Chabot, M.^2 ; Martinet, G.^2 ; Pino, T.^1 ; Le Padellec, A.^3 ; Bouneau, S.^2 ; Féraud, G.^5 ; Do Thi, N.^6 ; Vaeck, N.^4 ; Liévin, J.^4 ; Loreau, J.^4 ; Béroff, K.^1

Institut des Sciences Moléculaires d'Orsay, Université Paris Sud, CNRS, Orsay Cedex

F-91405, France^1

Institut de Physique Nucléaire d'Orsay, Université Paris Sud, CNRS, Orsay Cedex

F-91406, France^2

Institut de Recherche en Astronomie et Planétologie, Université Toulouse 3, CNRS, Toulouse

F-31028, France^3

Chimie Quantique et Photophysique, Université Libre de Bruxelles, Belgium^4

Departement F. Chemie and Biochemie, Universität Bern, Bern

3012, Switzerland^5

Center for Computational Physics, Institute of Physics, VAST, Hanoi, Viet Nam^6

关键词: Branching ratio;    Cationic fragments;    Excited molecules;    Ion-pair dissociation;    Measurements of;    Quantitative interpretation;    Relaxation channels;    Statistical approach;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032085/pdf
DOI  :  10.1088/1742-6596/635/3/032085

来源: IOP

【 摘 要 】

Ion-pair dissociation of a highly excited molecule is a relaxation process giving rise to emission of anionic and cationic fragments. We present first measurements of ion-pair dissociation of carbon clusters. We found that ion- pair relaxation is an ubiquitous, although very small, relaxation channel common to all sizes and charges of Cq+nspecies produced in high velocity C+n-He collisions. Quantitative interpretation of measured branching ratios is conducted on the basis of a statistical approach i.e through listing of all possible final states.