Predominance of single vacancy production in the formation of Oxygen dication

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

Sigaud, L.^1 ; Ferreira, Natalia^2 ; Montenegro, E.C.^3

Institute de Física, Universidade Federal Fluminense, Niterói, RJ

24210-346, Brazil^1

CEFET/RJ, Unidade Maracanã, Rio de Janeiro

20271-110, RJ, Brazil^2

Institute de Física, Universidade Federal Do Rio de Janeiro, Rio de Janeiro

21941-972, RJ, Brazil^3

关键词: Absolute cross sections;    Collisional;    De-excitations;    Dications;    Electron impact;    Energy ranges;    Ionization cross section;    Single vacancies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/7/072015/pdf
DOI  :  10.1088/1742-6596/635/7/072015

来源: IOP

【 摘 要 】

Absolute cross sections for O2++production from O2fragmentation by 30-400 eV electron impact were measured using the DETOF technique. This data is compared to the molecular orbitals ionization cross sections of O2, which were calculated using a simple and general procedure, and the fragmentation fractions arising from each molecular orbital were obtained. It was seen from the behaviour of the cross sections in this energy range that O2++results mainly from single vacancy production followed by post-collisional Auger-like deexcitation.