Atomic harmonic generation in time-dependent R-matrix theory


Autoria(s): Brown, Andrew; Robinson, David; van der Hart, H. W.
Data(s)

28/11/2012

Resumo

<p>We have developed the capability to determine accurate harmonic spectra for multielectron atoms within time-dependent R-matrix (TDRM) theory. Harmonic spectra can be calculated using the expectation value of the dipole length, velocity, or acceleration operator. We assess the calculation of the harmonic spectrum from He irradiated by 390-nm laser light with intensities up to 4 x 10(14) W cm(-2) using each form, including the influence of the multielectron basis used in the TDRM code. The spectra are consistent between the different forms, although the dipole acceleration calculation breaks down at lower harmonics. The results obtained from TDRM theory are compared with results from the HELIUM code, finding good quantitative agreement between the methods. We find that bases which include pseudostates give the best comparison with the HELIUM code, but models comprising only physical orbitals also produce accurate results.</p>

Formato

application/pdf

Identificador

http://pure.qub.ac.uk/portal/en/publications/atomic-harmonic-generation-in-timedependent-rmatrix-theory(ce8cd8c3-00ec-4e18-9bc3-87f153c69459).html

http://dx.doi.org/10.1103/PhysRevA.86.053420

http://pure.qub.ac.uk/ws/files/12979695/gauge.pdf

Idioma(s)

eng

Direitos

info:eu-repo/semantics/openAccess

Fonte

Brown , A , Robinson , D & van der Hart , H W 2012 , ' Atomic harmonic generation in time-dependent R-matrix theory ' Physical Review A (Atomic, Molecular, and Optical Physics) , vol 86 , no. 5 , 053420 . DOI: 10.1103/PhysRevA.86.053420

Tipo

article