Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Site selective dissociation upon core ionization of ozone

2006; Elsevier BV; Volume: 435; Issue: 4-6 Linguagem: Inglês

10.1016/j.cplett.2006.12.089

1873-4448

Alexandra Mocellin, Karoline Wiesner, S. L. Sörensen, Catalin Miron, Karine Le Guen, D. Céolin, M. Simon, Paul Morin, André Bueno Machado, Olle Björneholm, A. Naves de Brito,

Atomic and Molecular Physics

Ozone is found to exhibit substantial site-selective fragmentation when its fragment ions are collected in coincidence with energy selected electrons. We find a preferential production of the O2+/O+(O+/O+) ion pair upon ionization of the terminal (central) oxygen 1s electron. Depending on the hole localization, Auger rates are different towards the various final states of the dication, which would produce the observed different fragmentation pattern. We also observe however an increase O2+/O+ production for when the terminal core-hole state is vibrationally excited. This shows the role of the nuclear motion before the Auger decay in the observed site-specific.