Single photon double ionization of $\mbox{\sffamily\bfseries H}_{\hbox{\sffamily\bfseries\fontsize{12}\selectfont 2}}$ by circularly polarized photons at a photon energy of 160eV

• Published in: The European physical journal. ST, Special topics Vol. 169; pp. 109 - 116
• Main Authors: Kreidi, K, Akoury, D, Jahnke, T, Weber, Th, Staudte, A, Schoeffler, M, Neumann, N, Titze, J, Schmidt, L.Ph.H., Czasch, A, Jagutzki, O, Fraga, R.A. Costa, Grisenti, R E, Diez Muino, R., Cherepkov, N A, Semenov, S K, Ranitovic, P, Cocke, C L, Osipov, T
• Format: Journal Article
• Language: English
• Published: 01.03.2009
• DOI: 10.1140/epjst/e2009-00979-6
• ISSN: 1951-6355

We report on fully differential cross sections for double ionization of ${\rm H}_2$ by a single circularly polarized photon of 160eV energy. For an unequal sharing of the energy between the two electrons and a particular geometry where the influence of electron/electron interaction is constant, we find a four-lobe structure in the molecular frame angular distribution of the faster electron. This structure is interpreted to be due to a coherent emission of the electron from the two atomic centers of the molecule. This Young-type interference pattern is lost for other geometries, where electron-electron interaction plays a major role. Furthermore, we show that the interference structure depends strongly on the internuclear distance.