  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.
