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

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

2012-04-26

arxiv.org/abs/1204.5872v1

Phys. Rev. A 84, 061404 (2011)

Physics

Atomic Physics

4 pages, 3 figures, 1 table

Scientific paper

10.1103/PhysRevA.84.061404

The R-Matrix incorporating Time (RMT) method is a new method for solving the time-dependent Schroedinger equation for multi-electron 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 105.2 eV, we calculate the time delay to be 10.2 +/- 1.3 attoseconds, somewhat larger than estimated by other theoretical calculations, but still a factor two smaller than experiment. We repeated the calculation for a photon energy of 89.8 eV with a larger basis set capable of modelling correlated-electron dynamics within the neon atom and the residual Ne(+) ion. A time delay of 14.5 +/- 1.5 attoseconds was observed, compared to a 16.7 +/- 1.5 attosecond result using a single-configuration representation of the residual Ne(+) ion.

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