Theoretical resolution of the H- resonance spectrum up to the n=5 threshold: States of P-3(o) symmetry

Bylicki, M; Nicolaides, CA

dc.contributor.author	Bylicki, M	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:52:13Z
dc.date.available	2014-03-01T01:52:13Z
dc.date.issued	2002	en
dc.identifier.issn	1050-2947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26601
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	ELECTRON-HYDROGEN SCATTERING	en
dc.subject.other	DOUBLY-EXCITED-STATES	en
dc.subject.other	SHAPE RESONANCES	en
dc.subject.other	AUTOIONIZING STATES	en
dc.subject.other	WIDTHS	en
dc.subject.other	ENERGIES	en
dc.subject.other	DEPENDENCE	en
dc.subject.other	ATOMS	en
dc.title	Theoretical resolution of the H- resonance spectrum up to the n=5 threshold: States of P-3(o) symmetry	en
heal.type	journalArticle	en
heal.identifier.secondary	012504	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The spectrum of resonance states of H- of P-3(0) symmetry up to the n=5 Hydrogen threshold has been resolved by identifying all the complex eigenvalues of the corresponding Schrodinger equation with widths down to about 10(-9) a.u. In order to achieve this spectral resolution inside the continuous spectrum, we employed the previously described polyelectronic complex-eigenvalue Schrodinger-equation theory, with special choices of large trial two-electron spaces, constructed in terms of real and complex one-electron Slater-type orbitals. Electron correlation and multistate and multichannel couplings characteristic to the problem were accounted for with high numerical accuracy. The basis set of real orbitals constituting the localized part of the resonances, were chosen systematically so as to cover in a regular manner the configuration space from 3 a.u. up to about 10(4) a.u. In this way, both the inner and the outer (very diffuse) orbitals as well as the possible cases of medium-range intrashell states were represented reliably. Energies, widths, and wave-function characteristics were computed and analyzed for 83 resonances below the n=2, 3, 4, and 5 Hydrogen levels. The essence of these results is presented numerically as well as in special figures, whose purpose is to demonstrate the degree to which these complex eigenvalues fall into series according to the Gailitis-Damburg theory of dipole resonances. The existence of series of dipole resonances with characteristic energy and width scaling is used as the zero-order reference model. We found that, in general, the resonances indeed follow the regularity predicted by the Gailitis-Damburg model. At the same time, there are a few irregularities, caused by interserics perturbations. They appear especially strongly in regions where overlapping resonances exist. Using our previous results for the resonance spectrum of P-1(0) symmetry, similarities and differences are discussed. Finally, the existence of a shape resonance lying above the n=3 threshold, which has been predicted in earlier work, is confirmed. On the contrary, our calculations did not confirm the appearance of a shape resonance above the n=2 threshold, which has also been predicted before in the literature.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	PHYSICAL REVIEW A	en
dc.identifier.isi	ISI:000173273800053	en
dc.identifier.volume	65	en
dc.identifier.issue	1	en