Double photoionization of propylene oxide: A coincidence study of the ejection of a pair of valence-shell electrons
| Autor: | Luca Schio, Vincenzo Aquilanti, Fernando Pirani, Manuela S. Arruda, Daniele Catone, Luiz A. V. Mendes, Robert Richter, Stefano Falcinelli, Michele Alagia, Franco Vecchiocattivi, Stefano Stranges, Federico Palazzetti |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Circular dichroism
Atomic Physics (physics.atom-ph) General Physics and Astronomy Synchrotron radiation FOS: Physical sciences chirality Photoionization Electron Photon energy 010402 general chemistry 01 natural sciences molecular dication Physics - Atomic Physics dichroism photoionization oxides synchrotron radiation ions and properties mass spectra chemistry.chemical_compound Fragmentation (mass spectrometry) double photoionization propylene oxide molecular dication synchrotron radiation chirality 0103 physical sciences Propylene oxide Physical and Theoretical Chemistry Physics double photoionization 010304 chemical physics propylene oxide 0104 chemical sciences chemistry Atomic physics Valence electron |
| Zdroj: | The Journal of chemical physics 148 (2018). doi:10.1063/1.5024408 info:cnr-pdr/source/autori:Falcinelli, Stefano; Vecchiocattivi, Franco; Alagia, Michele; Schio, Luca; Richter, Robert; Stranges, Stefano; Catone, Daniele; Arruda, Manuela S.; Mendes, Luiz A. V.; Palazzetti, Federico; Aquilanti, Vincenzo; Pirani, Fernando/titolo:Double photoionization of propylene oxide: A coincidence study of the ejection of a pair of valence-shell electrons/doi:10.1063%2F1.5024408/rivista:The Journal of chemical physics/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:148 |
| Popis: | Propylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the current debate on protobiological homochirality. In the present work, a photoelectron-photoion-photoion coincidence technique, using an ion-imaging detector and tunable synchrotron radiation in the 18.0-37.0 eV energy range, permits: (i)-to observe six double-ionization fragmentation channels, their relative yields being accounted for about two-thirds by the couple (C2H4+, CH2O+), one-fifth by (C2H3+, CH3O+); (ii)-to measure thresholds for their openings as a function of photon energy; (iii)-to unravel a pronounced bimodality for a kinetic-energy-released distribution, fingerprint of competitive non-adiabatic mechanisms. 27 pages, 6 figures |
| Databáze: | OpenAIRE |
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