Single and double photoionization cross sections of the He- 1s2s2p4Po state at and far from threshold, from the many-electron, many-photon theory

Haritos, C; Mercouris, T; Nicolaides, CA

dc.contributor.author	Haritos, C	en
dc.contributor.author	Mercouris, T	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:47:29Z
dc.date.available	2014-03-01T01:47:29Z
dc.date.issued	1998	en
dc.identifier.issn	09534075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25223
dc.title	Single and double photoionization cross sections of the He- 1s2s2p4Po state at and far from threshold, from the many-electron, many-photon theory	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-4075/31/19/005	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-4075/31/19/005	en
heal.publicationDate	1998	en
heal.abstract	We report values for the single-photoionization cross sections to the3S and3Po channels and for the total double photoionization cross section, σ++(E), of the metastable He- 1s2s2p4Po state, obtained from the implementation of the state-specific, complex eigenvalue many-electron, many-photon theory (MEMPT). The σ++(E) rises from 0 at E = 0 to a maximum of about 1.0 × 10-20 cm2 at E ∼ 3-5 eV and dies out around 30 eV. For this quantity, comparison with the measurements of Bae et al for E = 0.0-0.4 eV and with the semiclassical calculations of Crothers and Lennon, reveals disagreement. The effect of initial-state correlation in this case is quantitative but not qualitative.	en
heal.journalName	Journal of Physics B: Atomic, Molecular and Optical Physics	en
dc.identifier.doi	10.1088/0953-4075/31/19/005	en
dc.identifier.volume	31	en
dc.identifier.issue	19	en
dc.identifier.spage	L783	en
dc.identifier.epage	L791	en