Hybrid theory of P-wave electron-Li2+ elastic scattering and photoabsorption in two-electron systems

摘要

In previous papers [Bhatia, Phys. Rev. A 85, 052708 (2012); 86, 032709 (2012)] electron-hydrogen andnelectron-He+ P-wave scattering phase shifts were calculated using the hybrid theory. This method is extended tonthe singlet and triplet electron-Li2+ P-wave scattering in the elastic region, where the correlation functions are ofnHylleraas type. The short-range and long-range correlations are included in the Schr¨odinger equation at the samentime, by using a combination of a modifiedmethod of polarized orbitals and the optical potential formalism. Phasenshifts are compared to those obtained by other methods. The present calculation requires very few correlationnfunctions to obtain accurate results which are rigorous lower bounds to the exact phase shifts. The continuumnfunctions obtained in this method are used to calculate photodetachment and photoionization cross sectionsnof two-electron systems H−, He, and Li+. Cross sections of the metastable 1,3S states of He, and Li+ are alsoncalculated. These cross sections are calculated in the elastic region and comparedwith previous calculations.Usingnthese cross sections, the Maxwellian-averaged radiative-recombination rates at various electron temperatures arenalso calculated.