Perturbation theory in a strong-interaction regime with application to 4d-subshell spectra of Ba and La

Wendin, Göran; Starace, Anthony F.

doi:10.1088/0022-3700/11/24/007

Cited by 81 publications

(16 citation statements)

References 23 publications

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“…14 ' 16 Connerade 14 has therefore denoted this wave function 4, ef. (There has been some confusion about the identification of this level, which has been resolved by the finding that all the nf wave func- tions lose a node upon collapse.…”

Section: H Hecht and I Lindaumentioning

confidence: 99%

Measurement of Subshell Photoionization Cross Sections of Ba near the4dThreshold

Hecht

Lindau

1981

Phys. Rev. Lett.

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We present here measurements of the angleintegrated 5/>, 5s, and Ad subshell photoionization cross sections for polycrystalline Ba around and above the Ad threshold. Soft-x-ray-induced photoemission in Ba is dominated by many-electron interactions: A broad Ad resonance is accompanied by outer-shell photoexcitation resonances near the threshold which cannot be explained in the framework of a one-electron model.The energy of soft x rays absorbed in a solid or gas is converted principally into photoelectron energy. The kinetic energy of outgoing photoelectrons provides information about the initial and 241 (1972).

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Section: H Hecht and I Lindaumentioning

confidence: 99%

Measurement of Subshell Photoionization Cross Sections of Ba near the4dThreshold

Hecht

Lindau

1981

Phys. Rev. Lett.

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“…A large variety of theoretical methodologies have been used to explain the experimental data [7][8][9][10][11]. This behavior was finally understood in terms of the effective potential for f orbitals which has an inner well separated from an outer well by a potential barrier [5].…”

mentioning

confidence: 99%

Absolute Measurements and Theoretical Calculations of Photoionization Cross Sections along the Isonuclear Sequence of Multiply Charged Barium Ions

et al. 2001

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Photoionization of multiply charged ions of the Ba isonuclear sequence up to Ba6+ has been studied in a beam-beam experiment. A very strong increase in the resonance structures was observed when moving from Ba2+ to Ba6+. Absolute values of the photoionization cross sections were measured for Ba2+ and Ba3+ ions. The interpretation of the results is provided using theoretical multiconfiguration Dirac-Fock and relativistic random phase approximation calculations, showing that the collapse of the nf orbitals occurs for Ba4+.

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“…We seek this solution in the single-active electron (SAE) approximation using the TDSE computer code [16]. The target atom is described by a localized Hartree-Fock potential (LHF) [17]. The TDSE SAE approach to RABBITT has been tested successfully on He [18], Li [19], Ne [20], and heavier noble gas atoms [21].…”

Section: Non-perturbative Treatmentmentioning

confidence: 99%

Revealing the Target Electronic Structure with Under-Threshold RABBITT

Kheifets

2021

Atoms

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The process of reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) reveals the target atom electronic structure when one of the transitions proceeds from below the ionization threshold. Such an under-threshold RABBITT resonates with the target bound states and thus maps faithfully the discrete energy levels and the corresponding oscillator strengths. We demonstrate this sensitivity by considering the Ne atom driven by the combination of the XUV and IR pulses at the fundmanetal laser frequency in the 800 and 1000 nm ranges.

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Perturbation theory in a strong-interaction regime with application to 4d-subshell spectra of Ba and La

Cited by 81 publications

References 23 publications

Measurement of Subshell Photoionization Cross Sections of Ba near the4dThreshold

Measurement of Subshell Photoionization Cross Sections of Ba near the4dThreshold

Absolute Measurements and Theoretical Calculations of Photoionization Cross Sections along the Isonuclear Sequence of Multiply Charged Barium Ions

Revealing the Target Electronic Structure with Under-Threshold RABBITT

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