| Literature DB >> 18764529 |
A Rudenko1, L Foucar, M Kurka, Th Ergler, K U Kühnel, Y H Jiang, A Voitkiv, B Najjari, A Kheifets, S Lüdemann, T Havermeier, M Smolarski, S Schössler, K Cole, M Schöffler, R Dörner, S Düsterer, W Li, B Keitel, R Treusch, M Gensch, C D Schröter, R Moshammer, J Ullrich.
Abstract
Recoil-ion momentum distributions for two-photon double ionization of He and Ne (variant Planck's over omega=44 eV) have been recorded with a reaction microscope at FLASH (the free-electron laser at Hamburg) at an intensity of approximately 1 x 10(14) W/cm2 exploring the dynamics of the two fundamental two-photon-two-electron reaction pathways, namely, sequential and direct (or nonsequential) absorption of the photons. We find strong differences in the recoil-ion momentum patterns for the two mechanisms pointing to the significantly different two-electron emission dynamics and thus provide serious constraints for theoretical models.Entities:
Year: 2008 PMID： 18764529 DOI： 10.1103/PhysRevLett.101.073003
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161