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dc.contributor.authorAlnaser, A.en_US
dc.contributor.authorComtois, D.en_US
dc.contributor.authorHasan, A.en_US
dc.contributor.authorVillenueve, D.en_US
dc.contributor.authorKieffer, J.en_US
dc.contributor.authorLitvinyuk, I.en_US
dc.date.accessioned2017-05-03T15:37:27Z
dc.date.available2017-05-03T15:37:27Z
dc.date.issued2008en_US
dc.date.modified2011-05-03T04:46:25Z
dc.identifier.issn09534075en_US
dc.identifier.doi10.1088/0953-4075/41/3/031001en_AU
dc.identifier.urihttp://hdl.handle.net/10072/38497
dc.description.abstractStrong-field double ionization of atoms in a non-sequential regime produces longitudinal ion momentum distributions with a characteristic double-peak structure. At 800 nm laser wavelength in Ne2+ the structure is very pronounced with a well-resolved dip at zero momentum, while for Ar2+ the dip is very shallow, possibly indicating different mechanisms in the two atoms. We investigated the source of this difference by measuring longitudinal momentum distributions of Ne2+ and Ar2+ ions at different laser wavelengths (485, 800, 1313 and 2000 nm) and intensities. The shapes of the experimental momentum distributions for the two atoms exhibit strong dependence on laser wavelength: for both the dip becomes more pronounced at longer wavelengths. At 1300 nm the longitudinal momentum spectrum for Ar2+ is similar to that of Ne2+ at 800 nm. On the other hand, the Ne2+ spectrum measured at 485 nm has the same shape as that of Ar2+ at 800 nm. This observation indicates that the difference between Ne and Ar observed at 800 nm should not be attributed solely to differences in relative electron impact ionization and excitation cross-sections of the two atoms. It is, to a larger extent, due to the interplay between the ponderomotive energy of electron and the ionization potentials of the target atom.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherIOP Publishinen_US
dc.publisher.placeBristol, Englanden_US
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom031001-1en_US
dc.relation.ispartofpageto031001-5en_US
dc.relation.ispartofissue3en_US
dc.relation.ispartofjournalJournal of Physics B - Atomic, Molecular and Optical Physicsen_US
dc.relation.ispartofvolume41en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchAtomic and Molecular Physicsen_US
dc.subject.fieldofresearchcode020201en_US
dc.titleStrong-field non-sequential double ionization: wavelength dependence of ion momentum distributions for neon and argonen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.date.issued2008
gro.hasfulltextNo Full Text


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