Phys. Rev. A 66, 022710 (2002) [8 pages]Regularities and irregularities in partial photoionization cross sections of HeReceived 29 March 2001; revised 2 May 2002; published 19 August 2002 We have combined B-spline basis sets with R-matrix theory for the description of photoionization in two-electron systems and applied this combination to the study of irregularities in He photoionization when doubly excited resonances up to the N=9 threshold of He+ are reached. Both total and partial photoionization cross sections have been obtained. Since the magnitude of the resonance effects is very similar for all partial cross sections, we believe that experimental investigations of photoionization cross sections leaving He+ in a highly excited state could provide the most information about possible long-range fluctuations in the photoionization cross sections. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.022710
DOI:
10.1103/PhysRevA.66.022710
PACS:
32.80.Fb, 31.15.Ar, 32.30.Rj
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