Photoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part II. Theoretical modeling of multi-photon and single-photon processes

dc.creatorde Castro, ARB
dc.creatorLaarmann, T
dc.creatorSchulz, J
dc.creatorWabnitz, H
dc.creatorMoller, T
dc.date2005
dc.dateAUG
dc.date2014-11-17T23:49:17Z
dc.date2015-11-26T16:47:55Z
dc.date2014-11-17T23:49:17Z
dc.date2015-11-26T16:47:55Z
dc.date.accessioned2018-03-28T23:34:13Z
dc.date.available2018-03-28T23:34:13Z
dc.identifierPhysical Review A. American Physical Soc, v. 72, n. 2, 2005.
dc.identifier1050-2947
dc.identifierWOS:000231564200139
dc.identifier10.1103/PhysRevA.72.023410
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59643
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/59643
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59643
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1274971
dc.descriptionWe consider the problem of a helium atom under the radiation field of the DESY vacuum ultraviolet (VUV) free electron laser (FEL) (Phase I, h congruent to 13 eV). We find by solving numerically the time-dependent Schrodinger equation, that there is a large probability for resonant two-photon excitation from the ground state into a low kinetic energy state just above the first He ionization threshold. From this it is possible to go into another quasi-free state higher up, by resonant absorption of an additional photon. There is no double ionization of He. These results are in general agreement with the He photoelectron and time-of-flight (TOF) spectra recorded on March 2002, in the last week of the DESY VUV FEL Phase I operation. A detailed report on the experiments is given in a companion paper.
dc.description72
dc.description2
dc.languageen
dc.publisherAmerican Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review A
dc.relationPhys. Rev. A
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectTransform Wave-functions
dc.subjectIonization
dc.subjectMg-10(&)
dc.subjectCompact
dc.subjectIons
dc.titlePhotoionization of helium atoms irradiated with intense vacuum ultraviolet free-electron laser light. Part II. Theoretical modeling of multi-photon and single-photon processes
dc.typeArtículos de revistas


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