Coulomb imaging of the concerted and stepwise break up processes of OCS ions in intense femtosecond laser radiation
| Autor: | Benji Wales, Wing-Ki Liu, Jean-Claude Kieffer, Éric Bisson, Samuel Beaulieu, Reza Karimi, Joseph Sanderson, ZiJian Long, Ali Ramadhan, Mathieu Giguère, François Légaré |
|---|---|
| Přispěvatelé: | Department of Physics and Astronomy [Waterloo], University of Waterloo [Waterloo], Institut National de la Recherche Scientifique [Québec] (INRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Advanced Laser Light Source-INRS-EMT, Énergie Matériaux Télécommunications - INRS (EMT-INRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM)-Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Concerted break up
Break-Up Coulomb imaging Molecular deformation Dissociation (chemistry) Ion law.invention Stepwise break up law Saddle point Physics::Atomic and Molecular Clusters Coulomb Physical and Theoretical Chemistry Spectroscopy [PHYS]Physics [physics] Radiation Molecular geometry Chemistry Pulse duration Condensed Matter Physics Laser Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Femtosecond laser Atomic physics |
| Zdroj: | Journal of Electron Spectroscopy and Related Phenomena Journal of Electron Spectroscopy and Related Phenomena, Elsevier, 2014, 195, pp.332-336. ⟨10.1016/j.elspec.2014.05.003⟩ Journal of Electron Spectroscopy and Related Phenomena, 2014, 195, pp.332-336. ⟨10.1016/j.elspec.2014.05.003⟩ |
| ISSN: | 0368-2048 |
| Popis: | International audience; We study the break up of OCS in intense femtosecond laser radiation using the FEMPULS technique to vary the laser pulse duration from 7 fs to 200 fs. Newton and Dalitz plots show the progression of molecular deformation and break up for OCS$^{3+}$ and OCS$^{4+}$. For increasing pulse length, the concerted three body dissociation exhibits increasing bending, and the amount of stepwise dissociation decreases. For the longest pulses however the stepwise process increases again. Both phenomena can be interpreted in terms of the effect of the laser field on lower charge states and the behaviour of a wave packet on a saddle point potential. The experiment illustrates the ability of the Coulomb imaging method to track molecular geometry and dynamics and indicates a new path to laser control of molecular parameters. |
| Databáze: | OpenAIRE |
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