T Osipov et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 091001 doi:10.1088/0953-4075/41/9/091001
T Osipov1, T N Rescigno1, T Weber1, S Miyabe2, T Jahnke3, A S Alnaser4,5, M P Hertlein1, O Jagutzki3, L Ph H Schmidt3, M Schöffler3, L Foucar3, S Schössler3, T Havermeier3, M Odenweller3, S Voss3, B Feinberg1, A L Landers6, M H Prior1, R Dörner3, C L Cocke4 and A Belkacem1
Show affiliationsCoincident measurement of the Auger electron and fragment ion momenta emitted after carbon core-level photoionization of acetylene has yielded new understanding of how the dication fragments. Ab initio calculations and experimental data, including body-frame Auger angular distributions, are used to identify the parent electronic states and together yield a comprehensive map of the dissociation pathways which include surface crossings and barriers to direct dissociation. The Auger angular distributions for certain breakup channels show evidence of core–hole localization.
33.80.Eh Autoionization, photoionization, and photodetachment
33.80.Gj Diffuse spectra; predissociation, photodissociation
Issue 9 (14 May 2008)
Received 24 March 2008, in final form 25 March 2008
Published 23 April 2008
T Osipov et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 091001
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