Time delay between photoemission from the 2p and 2s subshells of neon

L. R. Moore, M. A. Lysaght, J. S. Parker, H. W. Van Der Hart, K. T. Taylor

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Abstract

The R-matrix incorporating time (RMT) method is a method developed recently for solving the time-dependent Schrödinger equation for multielectron atomic systems exposed to intense short-pulse laser light. We have employed the RMT method to investigate the time delay in the photoemission of an electron liberated from a 2p orbital in a neon atom with respect to one released from a 2s orbital following absorption of an attosecond xuv pulse. Time delays due to xuv pulses in the range 76-105 eV are presented. For an xuv pulse at the experimentally relevant energy of 105.2 eV, we calculate the time delay to be 10.2±1.3 attoseconds (as), somewhat larger than estimated by other theoretical calculations, but still a factor of 2 smaller than experiment. We repeated the calculation for a photon energy of 89.8 eV with a larger basis set capable of modeling correlated-electron dynamics within the neon atom and the residual Ne ion. A time delay of 14.5±1.5 as was observed, compared to a 16.7±1.5 as result using a single-configuration representation of the residual Ne+ ion. 

Original languageEnglish
Article number061404
Number of pages4
JournalPhysical Review A
Volume84
Issue number6
DOIs
Publication statusPublished - 15 Dec 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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