J-matrix calculation of electron-helium S-wave scattering. II. Single ionization and single excitation
MetadataShow full item record
In the preceding paper [Konovalov et al., Phys. Rev. A 84, 032707 (2011)] we used the J -matrix (JM) method to solve the S-wave e-He scattering problem within the frozen-core model of helium. In the present work we go beyond the frozen-core model and adopt a general configuration-interaction description of helium (within the S-wave model). As a result a more accurate description of the helium target states is achieved that allowed us to obtain highly accurate numerical solutions of the e-He scattering problem for the elastic, 21,3S, 31,3S excitation and total ionization cross sections. The JM results are confirmed by the corresponding convergent-close-coupling (CCC) calculations. At energies above the ionization threshold some minor pseudoresonances are still evident in both the JM and CCC results despite the large bases used. The pseudoresonances are nearly completely eliminated by averaging a number of JM calculations creating a challenging benchmark for any current or future ab initio electron-atom scattering methods.
Showing items related by title, author, creator and subject.
Utamuratov, Ravshanbek (2010)This thesis presents the theoretical studies of positron scattering on the helium atom using two-center Convergent Close-Coupling (CCC) theory.The thesis organized in the following way: In the Introduction (Chapter I) the ...
Abdurakhmanov, Ilkhom (2011)This thesis is devoted to extension of the convergent close-coupling (CCC) method to heavy projectiles and its application to the theoretical studies of antiproton scattering on the hydrogen and helium targets.In the ...
Abdurakhmanov, Ilkhom; Kadyrov, Alisher; Fursa, Dmitry; Bray, Igor; Stelbovics, Andris (2011)We apply the fully quantum-mechanical convergent close-coupling method to the calculation of antiproton scattering on the ground state of helium. The helium target is treated as a three-body Coulomb system using frozen-core ...