Time-dependent R -matrix theory for ultrafast atomic processes
Data(s) |
13/05/2009
|
---|---|
Resumo |
We describe an ab initio nonperturbative time-dependent R-matrix theory for ultrafast atomic processes. This theory enables investigations of the interaction of few-femtosecond and -attosecond pulse lasers with complex multielectron atoms and atomic ions. A derivation and analysis of the basic equations are given, which propagate the atomic wave function in the presence of the laser field forward in time in the internal and external R-matrix regions. To verify the accuracy of the approach, we investigate two-photon ionization of Ne irradiated by an intense laser pulse and compare current results with those obtained using the R-matrix Floquet method and an alternative time-dependent method. We also verify the capability of the current approach by applying it to the study of two-dimensional momentum distributions of electrons ejected from Ne due to irradiation by a sequence of 2 as light pulses in the presence of a 780 nm laser field. |
Formato |
application/pdf |
Identificador |
http://dx.doi.org/10.1103/PhysRevA.79.053411 http://pure.qub.ac.uk/ws/files/555055/PhysRevA.79.053411.pdf |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Lysaght , M A , van der Hart , H W & Burke , P G 2009 , ' Time-dependent R -matrix theory for ultrafast atomic processes ' Physical Review A (Atomic, Molecular, and Optical Physics) , vol 79 , no. 5 , 053411 . DOI: 10.1103/PhysRevA.79.053411 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100/3107 #Atomic and Molecular Physics, and Optics |
Tipo |
article |