title: Interference quenching of nu(")=1 vibrational line in resonant photoemission of N2: a possibility to obtain geometrical information on the core-excited state.
abstract: An interference quenching of the nu(")=1 vibrational line in the resonant Auger decay of N 1s-->pi(*) core-excited N2 is observed and analyzed. The intensity ratio between the nu(")=1 and nu(")=0 vibrational levels of the X2Sigma(+)(g) final state shows a surprising nonmonotonous variation as a function of frequency detuning, going through a minimum with a complete suppression of nu(")=1. We have developed a simple model which shows a linear relation between the value of the detuning frequency for this minimum and the equilibrium bond distance R(0)(c) of the core-excited state. A new way is thus established of determining the equilibrium bond distance for the core-excited state with a precision deltaR(0)(c)<10(-3) A.
authors.affiliation: Department of Physics, Uppsala University, Box 530, Sweden.
authors.forename: R
authors.initials: R
authors.lastname: Feifel
authors.forename: F
authors.initials: F
authors.lastname: Gel'mukhanov
authors.forename: A
authors.initials: A
authors.lastname: Baev
authors.forename: H
authors.initials: H
authors.lastname: Agren
authors.forename: M N
authors.initials: MN
authors.lastname: Piancastelli
authors.forename: M
authors.initials: M
authors.lastname: Bässler
authors.forename: C
authors.initials: C
authors.lastname: Miron
authors.forename: S L
authors.initials: SL
authors.lastname: Sorensen
authors.forename: A
authors.initials: A
authors.lastname: Naves De Brito
authors.forename: O
authors.initials: O
authors.lastname: Björneholm
authors.forename: L
authors.initials: L
authors.lastname: Karlsson
authors.forename: S
authors.initials: S
authors.lastname: Svensson