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We analyze theoretically interference effects in the spectra of electrons emitted in the H2 photoionization by high energy linearly polarized photons. Molecular bound and continuum states are accurately described by means of B-spline basis allowing the inclusion of the nuclear degrees of freedom. One interesting feature is observed: the usual Franck-Condon behavior is not followed when the H2 internuclear axis is parallel to the polarization direction. Moreover, this is related to the fact that for this molecular orientation and under certain conditions, the electron cannot be emitted in the direction of the radiation field. On the contrary, for H 2 molecules perpendicular to the polarization direction, the angular distribution of electrons is analogous to the one observed in the two slits Young's experimentWork partially supported by the Spanish Ministerio de Ciencia e Innovación (contract FIS2007-60064), the European Science Foundation (COST action CM0702), and the Spanish Subdirección General de Cooperación Internacional. OAF acknowledges the kind hospitality in the group of ’Computations in Atomic and Molecular Physics of Unbound Systems’ of the Universidad Autónoma de Madrid (Spain), as well as financial support from the Secretaría de Estado de Educación y Universidades (Spain) through a grant for foreign researchers. Calculations were performed at the Barcelona Supercomputer Center Mare Nostrum and the Centro de Computación Científica UAM (Spain). OAF acknowledges partial financial support from CONICET (PIP 1026) and ANPCyT (PICT 1912

Interference and non-Franck-Condon effects in ionization of H2molecules by photon impact

Interference and non-Franck-Condon effects in ionization of H₂molecules by photon impact