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Helium atom in presence of DC and AC electric fields

Ivanov, Igor; Kheifets, Anatoli

Description

We investigate the effect of a static electric field on photoionization of the He atom in the ground IS and low-lying 2S and 2P excited states. The field-affected ionization potential and photoionization crosssection are determined from the complex eigenvalues of the time-dependent Schrödinger equation solved by the complex rotation method in the Floquet ansatz. Accuracy of the method is enhanced by the use of the Hylleraas basis set. For the ground state of helium, we find that the total...[Show more]

dc.contributor.authorIvanov, Igor
dc.contributor.authorKheifets, Anatoli
dc.date.accessioned2015-12-07T22:19:37Z
dc.identifier.issn1434-6060
dc.identifier.urihttp://hdl.handle.net/1885/19431
dc.description.abstractWe investigate the effect of a static electric field on photoionization of the He atom in the ground IS and low-lying 2S and 2P excited states. The field-affected ionization potential and photoionization crosssection are determined from the complex eigenvalues of the time-dependent Schrödinger equation solved by the complex rotation method in the Floquet ansatz. Accuracy of the method is enhanced by the use of the Hylleraas basis set. For the ground state of helium, we find that the total photoionization cross-section remains constant or decreases as a function of the DC field strength until this field reaches a certain critical value. For the low-lying excited states, effect of the static field is similar to the ordinary DC Stark effect.
dc.publisherSpringer
dc.sourceEuropean Physical Journal D: Atomic, Molecular, Optical and Plasma Physics
dc.titleHelium atom in presence of DC and AC electric fields
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume38
dc.date.issued2006
local.identifier.absfor020201 - Atomic and Molecular Physics
local.identifier.ariespublicationu4169254xPUB8
local.type.statusPublished Version
local.contributor.affiliationIvanov, Igor, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationKheifets, Anatoli, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage471
local.bibliographicCitation.lastpage479
local.identifier.doi10.1140/epjd/e2006-00061-y
dc.date.updated2015-12-07T08:38:38Z
local.identifier.scopusID2-s2.0-33646488070
CollectionsANU Research Publications

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