  The probability that an atom of hydrogen, initially in the 5g(m=4) state,
survives a 90-fs pulse of 620 nm wavelength is calculated both by direct
integration of the time-dependent Schroedinger equation and by a Floquet
calculation. The two methods give virtually identical results. The survival
probability calculated for a one-electron model of neon, for the same initial
state, pulse duration and wavelength, is in fair quantitative agreement with
the experimental data of van Druten et al [Phys. Rev. A 55, 622 (1997)].
