Complex Fano asymmetry parameters for helium L=0,1,2

doi:10.1088/0953-4075/42/22/225201

Complex Fano asymmetry parameters for helium L = 0, 1, 2 autoionizing levels excited by electron impact

N L S Martin et al 2009 J. Phys. B: At. Mol. Opt. Phys. 42 225201 (7pp) doi: 10.1088/0953-4075/42/22/225201

PDF (1.21 MB) | References

N L S Martin¹, B A deHarak² and K Bartschat³
¹ Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, USA
² Physics Department, Illinois Wesleyan University, PO Box 2900, Bloomington, IL 61702-2900, USA
³ Department of Physics and Astronomy, Drake University, Des Moines, IA 50311, USA

Abstract. Theoretical Fano q-parameters for He autoionizing states excited by electron impact are presented, as extracted from first- and second-order hybrid distorted-wave Born + R-matrix calculations. It is found that the q-parameters for (2s²)¹S, (2p²)¹D, and (2s2p)¹P from the first-order calculations are essentially real quantities, while those from the second-order calculations are complex but with a real part similar to the first-order values. These findings are interpreted in terms of the relative phases of the first- and second-order amplitudes.

Print publication: Issue 22 (28 November 2009)
Received 19 August 2009, in final form 29 September 2009
Published 30 October 2009

Post to CiteUlike |

Post to Connotea |

Post to Bibsonomy

Complex Fano asymmetry parameters for helium L = 0, 1, 2 autoionizing levels excited by electron impact

Find related articles

Article options

Authors & Referees