Electron impact experimental and theoretical fourfold differential cross section for CH4

International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces 2014

Mir, R. El^1,2,3 ; Casagrande, E. M. Staicu^3,4 ; Cappello, C. Dal^1 ; Naja, A.^2 ; Mansouri, A.^5 ; Kada, I.^5

SRSMC, UMR CNRS 7565, Université de Lorraine, BP 70239, Vandoeuvre- les Nancy

F-54506, France^1

LPM, EDST, Lebanese University, Tripoli, Lebanon^2

Université Paris-Sud, Institut des Sciences Moléculaires d'Orsay (ISMO), Orsay Cedex

F- 91405, France^3

CNRS, ISMO, Orsay Cedex

F-91405, France^4

LPQSD, Département de Physique, Université de Setifl, 19000, Algeria^5

关键词: Corrective factor;    Developed model;    Differential cross section;    Double ionization;    Double ionization mechanisms;    Ejected electrons;    Electron impact;    Incident energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/601/1/012005/pdf
DOI  :  10.1088/1742-6596/601/1/012005

来源: IOP

【 摘 要 】

New development of the 3C approximated model describing the fourfold differential cross section for double ionization of CH4will be reported. A corrective factor called Ward- Macek will take into account the repulsion between the two ejected electrons instead of the usual Gamow factor. To validate the developed model, we performed the coplanar (e, 3-1e) experiments for the double ionization of the methane target by electron impact at intermediate incident energy and different energy range for the pair of ejected electrons. Some agreement is found for the forward part of the angular distributions. The differences are discussed in terms of double ionization mechanisms.