Inner-shell excitation and fragmentation of sulfur aggregates

Autor(en): Teodorescu, CM
Gravel, D
Choi, J
Pugmire, D
Dowben, PA
Fominykh, N
Pavlychev, AA
Ruhl, E
Stichwörter: CLUSTERS; coincidence spectroscopy; COMPLEXES; extended Huckel calculations; inner-shell excitation; mass spectrometry; Spectroscopy; sulfur; VAPOR
Erscheinungsdatum: 1999
Herausgeber: ELSEVIER SCIENCE BV
Journal: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volumen: 101
Ausgabe: SI
Startseite: 193
Seitenende: 198
Zusammenfassung: 
Variable size sulfur aggregates (S-n with 3 less than or equal to n less than or equal to 8) were investigated in the S 2p excitation regime (160 eV less than or equal to E less than or equal to 175 eV) using monochromatic synchrotron radiation. Partial ion yields of mass-selected cations are compared with semiempirical extended Huckel calculations, yielding detailed information on the electronic and geometric structure of the aggregates. Inner-shell excitation in the S 2p regime leads to efficient formation of doubly charged species, which undergo rapid fragmentation via charge separation. The fragmentation pathways are investigated by photoelectron-photoion-photoion coincidence (PEPIPICO) spectroscopy. The charge separation mechanisms are interpreted in terms of Coulomb explosion. (C) 1999 Elsevier Science B.V. All rights reserved.
Beschreibung: 
12th International Conference on Vacuum Ultraviolet Radiation Physics (VUV-12), SAN FRANCISCO, CA, AUG 03-07, 1998
ISSN: 03682048
DOI: 10.1016/S0368-2048(98)00445-9

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