title: Interference stabilization of autoionizing states in molecular N2studied by time- and angular-resolved photoelectron spectroscopy.
abstract: An autoionizing resonance in molecular N2is excited by an ultrashort XUV pulse and probed by a subsequent weak IR pulse, which ionizes the contributing Rydberg states. Time- and angular-resolved photoelectron spectra recorded with a velocity map imaging spectrometer reveal two electronic contributions with different angular distributions. One of them has an exponential decay rate of 20 ± 5 fs, while the other one is shorter than 10 fs. This observation is interpreted as a manifestation of interference stabilization involving the two overlapping discrete Rydberg states. A formalism of interference stabilization for molecular ionization is developed and applied to describe the autoionizing resonance. The results of calculations suggest, that the effect of the interference stabilization is facilitated by rotationally-induced couplings of electronic states with different symmetry.
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Martin
authors.initials: M
authors.lastname: Eckstein
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Nicola
authors.initials: N
authors.lastname: Mayer
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Chung-Hsin
authors.initials: CH
authors.lastname: Yang
authors.affiliation: Dipartimento di Fisica, Politecnico, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Sansone
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Marc J J
authors.initials: MJ
authors.lastname: Vrakking
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Misha
authors.initials: M
authors.lastname: Ivanov
authors.affiliation: Max Born Institute, Max-Born-Straße 2A, 12489 Berlin, Germany. kornilov@mbi-berlin.de.
authors.forename: Oleg
authors.initials: O
authors.lastname: Kornilov