title: Auger electron angular distribution of double core-hole states in the molecular reference frame.
abstract: The Linac Coherent Light Source free electron laser is a source of high brightness x rays, 2×10(11) photons in a ∼5 fs pulse, that can be focused to produce double core vacancies through rapid sequential ionization. This enables double core vacancy Auger electron spectroscopy, an entirely new way to study femtosecond chemical dynamics with Auger electrons that probe the local valence structure of molecules near a specific atomic core. Using 1.1 keV photons for sequential x-ray ionization of impulsively aligned molecular nitrogen, we observed a rich single-site double core vacancy Auger electron spectrum near 413 eV, in good agreement with ab initio calculations, and we measured the corresponding Auger electron angle dependence in the molecular frame.
authors.affiliation: SLAC National Accelerator Laboratory, The PULSE Institute for Ultrafast Energy Science, 2575 Sand Hill Road, Menlo Park, California 94025, USA. jcryan@stanford.edu
authors.forename: James P
authors.initials: JP
authors.lastname: Cryan
authors.forename: J M
authors.initials: JM
authors.lastname: Glownia
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authors.initials: J
authors.lastname: Andreasson
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authors.lastname: Belkacem
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authors.lastname: Berrah
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authors.initials: CI
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authors.lastname: Bostedt
authors.forename: J
authors.initials: J
authors.lastname: Bozek
authors.forename: C
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authors.lastname: Buth
authors.forename: L F
authors.initials: LF
authors.lastname: DiMauro
authors.forename: L
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authors.lastname: Fang
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authors.lastname: Gessner
authors.forename: M
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authors.lastname: Guehr
authors.forename: J
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authors.lastname: Hajdu
authors.forename: M P
authors.initials: MP
authors.lastname: Hertlein
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authors.lastname: Hoener
authors.forename: O
authors.initials: O
authors.lastname: Kornilov
authors.forename: J P
authors.initials: JP
authors.lastname: Marangos
authors.forename: A M
authors.initials: AM
authors.lastname: March
authors.forename: B K
authors.initials: BK
authors.lastname: McFarland
authors.forename: H
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authors.lastname: Merdji
authors.forename: V S
authors.initials: VS
authors.lastname: Petrović
authors.forename: C
authors.initials: C
authors.lastname: Raman
authors.forename: D
authors.initials: D
authors.lastname: Ray
authors.forename: D
authors.initials: D
authors.lastname: Reis
authors.forename: F
authors.initials: F
authors.lastname: Tarantelli
authors.forename: M
authors.initials: M
authors.lastname: Trigo
authors.forename: J L
authors.initials: JL
authors.lastname: White
authors.forename: W
authors.initials: W
authors.lastname: White
authors.forename: L
authors.initials: L
authors.lastname: Young
authors.forename: P H
authors.initials: PH
authors.lastname: Bucksbaum
authors.forename: R N
authors.initials: RN
authors.lastname: Coffee
mesh_terms: D004583:Electrons; D008027:Light; D009584:Nitrogen / Q000737:chemistry; D055585:Physical Phenomena; D011789:Quantum Theory; D013057:Spectrum Analysis; D013997:Time Factors
chemical_list: D009584:Nitrogen