Time-resolved Coulomb-explosion imaging of nuclear wave-packet dynamics induced in diatomic molecules by intense few-cycle laser pulses

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dc.contributor.author Bocharova, I. A.
dc.contributor.author Alnaser, A. S.
dc.contributor.author Thumm, Uwe P. E.
dc.contributor.author Niederhausen, T.
dc.contributor.author Ray, D.
dc.contributor.author Cocke, Charles L.
dc.contributor.author Litvinyuk, I. V.
dc.date.accessioned 2013-05-30T18:58:36Z
dc.date.available 2013-05-30T18:58:36Z
dc.date.issued 2013-05-30
dc.identifier.uri http://hdl.handle.net/2097/15867
dc.description.abstract We studied the nuclear dynamics in diatomic molecules (N[subscript 2], O[subscript 2], and CO) following their interaction with intense near-IR few-cycle laser pulses. Using Coulomb-explosion imaging in combination with the pump-probe approach, we mapped dissociation pathways of those molecules and their molecular ions. We identified all symmetric and asymmetric breakup channels for molecular ions up to N[subscript 2][superscript 5+], O[subscript 2][superscript 4+], and CO[superscript 4+]. For each of those channels we measured the kinetic energy release (KER) spectra as a function of delay between the pump and probe pulses. For both N[subscript 2] and O[subscript 2] the asymmetric (3,1) channel is only observed for short (<20 fs) delays and completely disappears after that. We interpret this observation as a signature of electron localization taking place in dissociating molecular tri-cations when their internuclear separation reaches about 2.5 times the equilibrium bond length. This is a direct confirmation that electron localization plays an essential role in the universal mechanism of enhanced ionization in homonuclear diatomic molecules. Using classical and quantum mechanical simulations of the time-dependent KER spectra, we identify the pathways and intermediate states involved in the laser-induced dissociation of those molecules. en_US
dc.language.iso en_US en_US
dc.relation.uri http://pra.aps.org/abstract/PRA/v83/i1/e013417 en_US
dc.rights © 2011 American Physical Society en_US
dc.subject Nuclear dynamics en_US
dc.subject Coulomb-explosion imaging en_US
dc.subject Kinetic-energy release en_US
dc.subject Electron localization en_US
dc.title Time-resolved Coulomb-explosion imaging of nuclear wave-packet dynamics induced in diatomic molecules by intense few-cycle laser pulses en_US
dc.type Article (publisher version) en_US
dc.date.published 2011 en_US
dc.citation.doi doi:10.1103/PhysRevA.83.013417 en_US
dc.citation.epage 013417-17 en_US
dc.citation.issue 1 en_US
dc.citation.jtitle Physical Review A en_US
dc.citation.spage 013417-1 en_US
dc.citation.volume 83 en_US
dc.contributor.authoreid thumm en_US
dc.contributor.authoreid cocke en_US

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