A1 Refereed original research article in a scientific journal
Double core hole production in N2: Beating the Auger clock
Authors: Fang L, Hoener M, Gessner O, Tarantelli F, Pratt ST, Kornilov O, Buth C, Güehr M, Kanter EP, Bostedt C, Bozek JD, Bucksbaum PH, Chen M, Coffee R, Cryan J, Glownia M, Kukk E, Leone SR, Berrah N
Publication year: 2010
Journal: Physical Review Letters
Journal name in source: 1303.1429
Volume: 105
Issue: 8
First page : 083005
Number of pages: 5
ISSN: 0031-9007
DOI: https://doi.org/0.1103/PhysRevLett.105.083005(external)
Web address : http://arxiv.org/abs/1303.1429(external)
Abstract
We investigate the creation of double K-shell holes in N2 molecules via sequential absorption of two photons on a timescale shorter than the core-hole lifetime by using intense x-ray pulses from the Linac Coherent Light Source free electron laser. The production and decay of these states is characterized by photoelectron spectroscopy and Auger electron spectroscopy. In molecules, two types of double core holes are expected, the ?rst with two core holes on the same N atom, and the second with one core hole on each N atom. We report the ?rst direct observations of the former type of core hole in a molecule, in good agreement with theory, and provide an experimental upper bound for the relative contribution of the latter type.
We investigate the creation of double K-shell holes in N2 molecules via sequential absorption of two photons on a timescale shorter than the core-hole lifetime by using intense x-ray pulses from the Linac Coherent Light Source free electron laser. The production and decay of these states is characterized by photoelectron spectroscopy and Auger electron spectroscopy. In molecules, two types of double core holes are expected, the ?rst with two core holes on the same N atom, and the second with one core hole on each N atom. We report the ?rst direct observations of the former type of core hole in a molecule, in good agreement with theory, and provide an experimental upper bound for the relative contribution of the latter type.
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