Abstract
The convergence of the hyperspherical adiabatic expansion for helium-like systems has been studied numerically. The spectral problems arising after approximate separation of variables are solved by the finite-difference and finite-element methods. The energies of the ground and some doubly excited states of the negative hydrogen ion are calculated in the six-channel approximation within 10-4 au accuracy. The results obtained demonstrate a rapid convergence of the hyperspherical adiabatic expansion and agree reasonably well with experimental data as well as with other more complicated theoretical calculations.
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 callMore From: Journal of Physics B: Atomic, Molecular and Optical Physics
Disclaimer: 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.
