Journal
PHYSICAL REVIEW A
Volume 84, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.84.061404
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Funding
- UK Engineering and Physical Sciences Research Council
- CSE program
- Engineering and Physical Sciences Research Council [EP/G055416/1] Funding Source: researchfish
- EPSRC [EP/G055416/1] Funding Source: UKRI
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The R-matrix incorporating time (RMT) method is a method developed recently for solving the time-dependent Schrodinger 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.
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