Excitation-autoionization of the 5p6 subshell in Ba atoms

Borovik, V.; Roman, V; Kupliauskiene, A; Shafranyosh, І. І.; Borovik, A

doi:10.1140/epjd/e2019-90430-8

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The first quantitative assessment of the role of autoionization in electron-impact ionization was experimentally made for alkali atoms (see [29] and references therein). Recently, similar data were obtained for Ba atoms [30]. The role of the 4p 6 subshell in the ionization of Sr atoms was considered only theoretically.…”

Section: Introductionmentioning

confidence: 63%

Excitation-autoionization contribution to single ionization of Sr by electron impact

Borovik¹,

Shafranyosh²,

Borovik³

2020

Phys. Scr.

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The 4p6 excitation-autoionization (EA) cross-section of Sr atoms has been measured at electron-impact energies from the threshold to 600 eV. The cross-section has a pronounced resonance character in the near-threshold region, reaching its maximum value of (2.5 ± 0.8) × 10−16 cm2 at 24.5 eV. The shape and absolute value of the cross-section are determined by the excitation dynamics and the decay mode of autoionizing states from 4p54d5s2, 4p54d2nl and 4p54d5snl configurations. A comparative analysis of the measured EA cross-section, the calculated 5s2 ionization cross-section and the available ionization data showed that (i) direct ionization of the 5s2 shell and EA of the 4p6 shell adequately describe the single ionization of Sr atoms; (ii) 4p6 EA contribution reaches 25% of the total single ionization cross-section of Sr atoms.

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Section: Introductionmentioning

confidence: 63%

Excitation-autoionization contribution to single ionization of Sr by electron impact

Borovik¹,

Shafranyosh²,

Borovik³

2020

Phys. Scr.

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“…The experimental study of atoms by means of electron projectiles is a traditional field of interest. Such a work is reported by Borovik et al [ 6 ], where the excitation-autoionization (EA) cross section for the 5 subshell in Ba atoms was determined in an incident electron energy range from 15.61 eV up to 600 eV. The data were obtained by measuring the total intensity of ejected-electron spectra arising from the decay of the 5 autoionizing states.…”

Section: Experimental Advances In Electron and Ion Impact Processesmentioning

confidence: 99%

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

et al. 2021

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Many particle spectroscopy is a subject of continued interest to many experimental and theoretical groups worldwide. It is based on the coincidence spectroscopy of minimum two particles coming from the same elementary process. It is a very powerful tool for studying not just atoms and molecules but also more extended electronic systems such as clusters and surfaces. Due to the large variety of its applications, it is really an interdisciplinary research field. This Topical Issue presents a state-of-the-art description of current research activities in the field of many particle spectroscopy. The contributions to this Issue represent original research results on both experimental and theoretical studies, involving the interaction of various projectiles, like photons, electrons, ions with atoms, molecules, clusters and surfaces.

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Use of autoionization to measure microwave-driven transitions between high-n strontium Rydberg states

Brienza

Fields

Dunning

2021

Review of Scientific Instruments

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The use of autoionization as a tool to quantitatively analyze transitions between high-n strontium Rydberg states with low-to-intermediate values of L is described and is demonstrated through observations of Rabi oscillations when driving 5snf 1F3 → 5s(n + 1)g 1G4, 5snf 1F3 → 5s(n + 2)h 1H5, and 5snp 1P1 → 5s(n + 1)d 1D2 transitions using microwave fields. The technique is shown to offer advantages when compared to selective field ionization and can be used with other alkaline-earth and alkaline-earth-like metals.

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Excitation-autoionization of the 5p6 subshell in Ba atoms

Cited by 3 publications

References 23 publications

Excitation-autoionization contribution to single ionization of Sr by electron impact

Excitation-autoionization contribution to single ionization of Sr by electron impact

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

Use of autoionization to measure microwave-driven transitions between high-n strontium Rydberg states

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