title: Experimental verification of the chemical sensitivity of two-site double core-hole states formed by an x-ray free-electron laser.
abstract: We have performed x-ray two-photon photoelectron spectroscopy using the Linac Coherent Light Source x-ray free-electron laser in order to study double core-hole (DCH) states of CO2, N2O, and N2. The experiment verifies the theory behind the chemical sensitivity of two-site DCH states by comparing a set of small molecules with respect to the energy shift of the two-site DCH state and by extracting the relevant parameters from this shift.
authors.affiliation: Physics Department, Stockholm University, 106 91 Stockholm, Sweden. peter.salen@fysik.su.se
authors.forename: P
authors.initials: P
authors.lastname: Salén
authors.forename: P
authors.initials: P
authors.lastname: van der Meulen
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authors.lastname: Schmidt
authors.forename: R D
authors.initials: RD
authors.lastname: Thomas
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authors.lastname: Larsson
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authors.lastname: Feifel
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authors.lastname: Piancastelli
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authors.lastname: Fang
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authors.lastname: Murphy
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authors.lastname: Osipov
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authors.lastname: Berrah
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authors.lastname: Kukk
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authors.lastname: Ueda
authors.forename: J D
authors.initials: JD
authors.lastname: Bozek
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authors.lastname: Bostedt
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authors.lastname: Wada
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authors.lastname: Richter
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authors.lastname: Feyer
authors.forename: K C
authors.initials: KC
authors.lastname: Prince