Symmetry-favoured double photoionization of argon

Autor:	P Selles, J Mazeau, A Huetz, L. Malegat, Pascal Lablanquie
Rok vydání:	1997
Předmět:	Physics Argon Valence (chemistry) chemistry.chemical_element Photoionization Electron Photon energy Condensed Matter Physics Atomic and Molecular Physics and Optics Ion chemistry Homogeneous space Physics::Atomic and Molecular Clusters Atomic physics Helium
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 30:L293-L299
ISSN:	1361-6455 0953-4075
DOI:	10.1088/0953-4075/30/9/002
Popis:	Experiments where the energies and angles of the two emitted electrons are resolved have been performed for double photoionization of argon in the valence shells. So far such experiments were always restricted to the final states of doubly charged rare gases and to helium. Here we report on first measurements for the state of and we show that the symmetry of the residual ion leads to a situation which is completely new compared with all previous studies, since the two symmetries which are allowed for the pair of outgoing electrons ( and ) both have a `favoured' character. As a consequence the observed angular patterns exhibit a sharp maximum when the two electrons fly in opposite directions with equal energies, whereas a node exists in the unfavoured cases such as helium. Dynamical effects which appear when the photon energy is varied are also discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::61f3f0dd69b78a06c6c27e83391c0811 https://doi.org/10.1088/0953-4075/30/9/002 Zobrazit plný text záznamu