Phys. Rev. Lett. 101, 073003 (2008) [4 pages]Recoil-Ion Momentum Distributions for Two-Photon Double Ionization of He and Ne by 44 eV Free-Electron Laser RadiationReceived 12 February 2008; published 15 August 2008 Recoil-ion momentum distributions for two-photon double ionization of He and Ne (ℏω=44 eV) have been recorded with a reaction microscope at FLASH (the free-electron laser at Hamburg) at an intensity of ∼1×1014 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.073003
DOI:
10.1103/PhysRevLett.101.073003
PACS:
32.80.Rm, 41.60.Cr, 42.65.−k
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.