Existence and characterization of n = 3 triply excited resonances of He-

Nicolaides, CA; Piangos, NA

dc.contributor.author	Nicolaides, CA	en
dc.contributor.author	Piangos, NA	en
dc.date.accessioned	2014-03-01T01:16:34Z
dc.date.available	2014-03-01T01:16:34Z
dc.date.issued	2001	en
dc.identifier.issn	0953-4075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14090
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	Calculations	en
dc.subject.other	Electron energy levels	en
dc.subject.other	Electron resonance	en
dc.subject.other	Electron scattering	en
dc.subject.other	Helium	en
dc.subject.other	Negative ions	en
dc.subject.other	Atomic negative ions	en
dc.subject.other	Hartree-Fock method	en
dc.subject.other	Resonance states	en
dc.subject.other	Triply excited states	en
dc.subject.other	Atomic physics	en
dc.title	Existence and characterization of n = 3 triply excited resonances of He-	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-4075/34/1/306	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-4075/34/1/306	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	We predict, via large-scale calculations carried out in the framework of the state-specific theory of resonance states and accounting for all the localized electron correlations, the positions of 11 new triply excited resonances of He- in the region between 68.7 and 70.3 eV. These states can, in principle, be reached in electron-He 1s(2) S-1 and 1s2s S-3 scattering, and have the symmetries S-2, (4)p(o), (2)p(o), D-2, F-4(o), F-2(o) and (2)G. A few of these are essentially overlapping. Their zero-order representations consist of strongly mixing n = 3 configurations. Of special significance to achieving good convergence of the calculation to local energy minima in the continuous spectrum, while accounting for a large portion of the bound open-channel interactions, is the inclusion of open-channellike configurations, included self-consistently via the multi-configurational Hartree-Fock method. Our results allow the long overdue confirmation and interpretation of Roy's measurements (Roy D 1977 Phys. Rev. Lett. 38 1062).	en
heal.publisher	IOP, Bristol, United Kingdom	en
heal.journalName	Journal of Physics B: Atomic, Molecular and Optical Physics	en
dc.identifier.doi	10.1088/0953-4075/34/1/306	en
dc.identifier.isi	ISI:000166604900008	en
dc.identifier.volume	34	en
dc.identifier.issue	1	en
dc.identifier.spage	99	en
dc.identifier.epage	106	en