Dichromatic polyphotonic ionization rate of He for lambda(1)=248 nm and lambda(2)=(1/3)248 nm from the many-electron, many-photon theory

Mercouris, T; Nicolaides, CA

dc.contributor.author	Mercouris, T	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:49:51Z
dc.date.available	2014-03-01T01:49:51Z
dc.date.issued	2000	en
dc.identifier.issn	0953-4075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25938
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	MULTIPHOTON IONIZATION	en
dc.subject.other	LASER FIELDS	en
dc.subject.other	HYDROGEN	en
dc.title	Dichromatic polyphotonic ionization rate of He for lambda(1)=248 nm and lambda(2)=(1/3)248 nm from the many-electron, many-photon theory	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	By extending and implementing the many-electron, many-photon theory (MEMPT) to the dichromatic case with commensurate frequencies, we computed multiphoton ionization rates of He for experimentally realizable situations. Specifically, lambda (1) = 248 nm and lambda (2) = (1/3)248 nm with I-1 = 1 x 10(14) Wcm(-2) and I-2 = 1 x 10(10), 1 x 10(12) and 1 x 10(13) Wcm(-2). For I-2 = 1 X 10(12) W cm(-2), we present the curve of the rate as a function of the phase difference, phi, from 0 to 2 pi. For the other cases, we report the rates for phi = 0 and pi and we compare the MEMPT complex eigenvalues with those obtained by Telnov and Chu (1998 Int. J. Quantum Chem. 69 305) who used a generalized Floquet formulation of the time-dependent density functional theory at the independent-particle level. The effect of electron correlation, which is included in the MEMPT, is quantitative. Specifically, compared with the results of Telnov and Chu the MEMPT energies are lower by 0.04 au and the rates are larger by a factor of three.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS	en
dc.identifier.isi	ISI:000165666200019	en
dc.identifier.volume	33	en
dc.identifier.issue	21	en
dc.identifier.spage	4673	en
dc.identifier.epage	4678	en