Time-dependent multiphoton ionization from the He 1s2s1S metastable state

Nicolaides, CA; Dionissopoulou, S; Mercouris, T

dc.contributor.author	Nicolaides, CA	en
dc.contributor.author	Dionissopoulou, S	en
dc.contributor.author	Mercouris, T	en
dc.date.accessioned	2014-03-01T01:12:29Z
dc.date.available	2014-03-01T01:12:29Z
dc.date.issued	1996	en
dc.identifier.issn	0953-4075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12107
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	LASER FIELDS	en
dc.subject.other	AUTOIONIZATION	en
dc.subject.other	ATOMS	en
dc.title	Time-dependent multiphoton ionization from the He 1s2s1S metastable state	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-4075/29/2/012	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-4075/29/2/012	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	Using the state-specific expansion approach to the solution of the time-dependent Schrodinger equation, we calculated a number of observables from the response of the He 2(1)S metastable state to strong as well as to weak laser pulses. The photon energies (HBAR omega) were 1 eV, 2 eV, 2.47 eV and 3 eV, and the intensities (I) covered the range from 10(8) W cm(-2) to 10(14) W cm(-2). For the weak intensities, the results are in full accord with the experimental findings of Haberland and co-workers. For the strong intensities, our predictions are of quantitative as well as of qualitative value. They permit conclusions about the fingerprints left on observable spectra by electron correlation, by Rydberg levels and by doubly excited states and about the extent to which high harmonics of short wavelength can be produced as a function of l and omega w when the initial state lies above the ground state. Finally, we argue that calculations of harmonic spectra based on the use of the acceleration form of the dipole operator will produce, in general, unreliable results even when some correlations are accounted for.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics B: Atomic, Molecular and Optical Physics	en
dc.identifier.doi	10.1088/0953-4075/29/2/012	en
dc.identifier.isi	ISI:A1996TT83400012	en
dc.identifier.volume	29	en
dc.identifier.issue	2	en
dc.identifier.spage	231	en
dc.identifier.epage	246	en