Nonperturbative multiphoton detachment rates of H- and their relation to the electronic structure of the initial state

Nicolaides, CA; Haritos, C; Mercouris, T

dc.contributor.author	Nicolaides, CA	en
dc.contributor.author	Haritos, C	en
dc.contributor.author	Mercouris, T	en
dc.date.accessioned	2014-03-01T01:50:05Z
dc.date.available	2014-03-01T01:50:05Z
dc.date.issued	2000	en
dc.identifier.issn	0953-4075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25991
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	NEGATIVE-IONS	en
dc.subject.other	IONIZATION	en
dc.subject.other	FIELDS	en
dc.title	Nonperturbative multiphoton detachment rates of H- and their relation to the electronic structure of the initial state	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	By implementing the many-electron, many-photon theory. a series of ab initio nonperturbative calculations have produced multiphoton electron detachment rates (MPEDRs) for H- interacting with linearly polarized light of frequency in the range 0.136-0.326 2V and intensity in the range 2,5 x 10(10)-10 x 10(10) W cm(-2). For these laser parameters, detachment takes place by three, four, five, six and seven photons. For detachment by four and six photons, the rate exhibits structure which is due to field-induced interference between the S-1 and the D-1 channels. Analysis of the relation between the MPEDRs and initial state electronic structure reveals the type and the degree of direct and indirect self-consistent influence of radial and angular correlation at the configurational and at the orbital level. It is shown that the magnitude of the MPEDRs is proportional to the magnitude of the Is orbital for large values of the coordinate I. By using a numerical multiconfigurational Hartee-Fock (MCHF) wavefunction with only the 1s(2), 2s(2) and 2p(2) configurations, the large-r behaviour of the Is orbital is already very close to that determined from the use of a ten-term MCHF wavefunction. which we believe is sufficient to secure accurate results.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS	en
dc.identifier.isi	ISI:000088752900011	en
dc.identifier.volume	33	en
dc.identifier.issue	14	en
dc.identifier.spage	2733	en
dc.identifier.epage	2742	en