Time-dependent and time-independent methods applied to multiphoton ionization of helium

Authors
Parker, JS Glass, DH Moore, LR Smyth, ES Taylor, KT Burke, PG
Citation
Js. Parker et al., Time-dependent and time-independent methods applied to multiphoton ionization of helium, J PHYS B, 33(7), 2000, pp. L239-L247
Citations number
16
Categorie Soggetti
Physics
Journal title
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
ISSN journal
09534075 → ACNP
Volume
33
Issue
7
Year of publication
2000
Pages
L239 - L247
Database
ISI
SICI code
0953-4075(20000414)33:7<L239:TATMAT>2.0.ZU;2-X
Abstract
A comparison is made between results from the R-matrix Floquet approach and the direct numerical integration of the full-dimensional time-dependent Sc hrodinger equation for the multiphoton ionization of helium. Good agreement is obtained away from resonances in the intensity range 5 x 10(13) to 4 x 10(14) W cm(-2) at a laser wavelength of 248.6 nm. This agreement confirms error estimates made independently of the comparison. We review and contras t the two approaches, and discuss details of the convergence tests by which -error estimates are obtained.