Abstract
A modified Sternheimer method is used to provide analytic, polynomial solutions to the equations of perturbation theory for multiphoton absorption by hydrogenic ions. The solutions are in the form of asymptotic series whose coefficients can be rapidly computed by means of two-term recursion formulas. These series eventually lead to divergent solutions as a function of photon energy; however, calculations show that accurate two-photon cross sections can be obtained for the entire excitation spectrum and for the ionization continuum to about 1250 \AA{}. Three-photon ionization cross sections are also calculated and these are shown to be accurate to about 2400 \AA{}.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
