Sims, J.
and Hagstrom, S.
(2007),
Mathematical and computational science issues in high precision Hylleraas-configuration interaction variational calculations: II. Kinetic energy and nuclear attraction integrals, Journal of Physics B-Atomic Molecular and Optical Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50959
(Accessed April 26, 2024)
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Mathematical and computational science issues in high precision Hylleraas-configuration interaction variational calculations: II. Kinetic energy and nuclear attraction integrals
Published
Author(s)
, Stanley A. Hagstrom
Abstract
Three-electron kinetic energy and nuclear attraction integrals arising in Hylleraas-configuration interaction (Hy-CI) calculations are discussed. We show that the nuclear attraction operators introduce no new integral complications and that the kinetic energy operators lead to integrals which have much in common with electron interaction integrals treated in the first paper of this series. We discuss the efficient evaluation of the kinetic energy integrals and give selected values of the integrals to 30 digit accuracy. The one new W auxiliary function which arises in treating the kinetic energy operator is discussed in an Appendix. We also give a few details on the accurate evaluations of the Condon and Shortley cks which arise in Hy-CI calculations in an Appendix.Citation
Journal of Physics B-Atomic Molecular and Optical Physics
Volume
40
Pub Type
Journals
Download Paper
Keywords
Hy-CI, Hylleraas-configuration interaction method, three-electron kinetic energy and nuclear attraction
Citation
Created December 31, 2006, Updated October 12, 2021