Common Window Resonance Features in K and Heavier Alkaline Atoms Rb and Cs

Koide, Michi; Koike, Fumihiro; Nagata, Tetsuo; Levin, J. C.; Fritzsche, S.; Wehlitz, R.; Huang, Ming-Tie; DePaola, B. D.; Ohtani, S.; Azuma, Y.

doi:10.1143/jpsj.71.2681

Cited by 15 publications

(10 citation statements)

References 28 publications

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“…The Stark shifts are assumed zero because, as we have verified, they do not affect significantly the ionization signal. For the Fano parameter we have chosen three values: q = 1, q = 3, q = 6, which are close to the experimental values for LICS in sodium (q = 3.7) [17], helium (q = 0.73) [18], and hydrogen atoms (q = −5.9) [5], for electric-field mixing in rubidium (q = 3.3) [19], and for configuration mixing in potassium (q = 1) [20], rubidium (q = 0.1 − 0.3) [21], and cesium (q ≈ 0.43) [21]. Figure 5 shows contour plots of the ionization signal as a function of the center of the control pulse τ c and the peak control ionization rate Γ c0 for different values of the Fano parameter q and the irreversible loss rate Γ from state ψ 2 .…”

Section: Numerical Examplessupporting

confidence: 84%

Stimulated Raman adiabatic passage into continuum

2007

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We propose a technique, which produces nearly complete ionization of the population of a discrete state, coupled to a continuum by a two-photon transition via a lossy intermediate state, whose lifetime is much shorter than the interaction duration. We show that using counterintuitively ordered pulses, as in stimulated Raman adiabatic passage (STIRAP), wherein the pulse coupling the intermediate state to the continuum precedes and partly overlaps the pulse coupling the initial and intermediate states, greatly increases the ionization signal and strongly reduces the population loss due to spontaneous emission through the lossy state. For strong spontaneous emission from that state, however, the ionization is never complete because the dark state required for STIRAP does not exist. We demonstrate that this drawback can be eliminated almost completely by creating a laser-induced continuum structure (LICS) by embedding a third discrete state into the continuum with a third, control laser. This LICS introduces some coherence into the continuum, which enables a STIRAP-like population transfer into the continuum. A highly accurate analytic description is developed and numerical results are presented for Gaussian pulse shapes.

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Section: Numerical Examplessupporting

confidence: 84%

Stimulated Raman adiabatic passage into continuum

2007

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“…4p photoexcitation spectral profile. The similar feature has been observed for several other systems [15,16,3]. The window type structure at 36.7 eV is assigned as of 4 P resonance, and the structure at 37.4 eV, of 2 P resonance.…”

Section: The Effect Of Spin-orbit Migration In Sub-valence Ion Core Osupporting

confidence: 83%

Time dependent aspects in the ionizations following atomic photoexcitations

Koike

2009

Nuclear Instruments and Methods in Physics Research Section B:

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“…The charge-state resolved spectra were measured by gated collection of the photoion TOF counts. The apparatus is basically the same as that of our previous work, 17) and, therefore, its detailed description will not be repeated here. The details of the monochromator at BL-3B are described in refs.…”

Section: Methodsmentioning

confidence: 99%

“…[12][13][14][15] In a previous paper, we reported the window resonances of heavier alkaline atoms K, 16) Rb, and Cs. 17) The window resonance of these species were found to be distinctively broader compared with their neighboring rare gas atoms. Also the window shapes were found to exhibit significant differences from those in the neighboring rare gas atoms.…”

Section: Introductionmentioning

confidence: 95%

Variation of 3sPhotoionization Resonance Structures in a Serial Atomic Number Species Ar, K, and Ca

et al. 2003

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Subvalence 3s-shell photoionization resonances of Ca were measured with monochromatized synchrotron radiation and photoion time-of-flight spectroscopy method. Charge resolved photoion yield spectra were obtained. Broad peak structures were found in the Ca þ spectrum and shallow window structures were found in the Ca 2þ spectrum. We porformed MCDF calculations to assign the resonance structures. The 3s-shell photoionization of Ar and K were also measured for comparison. A systematic increase was observed in Fano-Beutler parameter and in the resonance width along with the increase of atomic number from Z ¼ 18(Ar) to 20(Ca). We discuss also the spectral structures that could be of the 3p double-shake-up satellites, which are observed in the 3s photoionization region.

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Common Window Resonance Features in K and Heavier Alkaline Atoms Rb and Cs

Cited by 15 publications

References 28 publications

Stimulated Raman adiabatic passage into continuum

Stimulated Raman adiabatic passage into continuum

Time dependent aspects in the ionizations following atomic photoexcitations

Variation of 3sPhotoionization Resonance Structures in a Serial Atomic Number Species Ar, K, and Ca

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