Photoionization bands of rubidium molecule

Rakić, Mario; Pichler, Goran

doi:10.1016/j.jqsrt.2018.01.003

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…Recently, a structured photoionization continuum was studied by Pichler et al [12], where the superheating of cesium vapor was used to reveal the molecular origin of the observed absorption bands. Quite recently, a structured photoionization continuum of Rb 2 was measured at very high temperatures of up to 600 • C, which enabled the appreciable enhancement of the sought absorption bands [13]. This measurement confirmed the molecular origin of the observed rubidium absorption photoionization bands.…”

Section: Introductionmentioning

confidence: 58%

“…In the present work, we undertook to study the structured photoionization continuum which appeared in the form of the absorption bands of the KCs molecule in the 220,300 nm spectral interval. We adopt the conclusion of the previous works [7,[11][12][13] that observed photoionization KCs bands are of molecular origin. For such a study, it was very important to use an all-sapphire cell which enabled measurements of absorption coefficient at very high temperatures and particle densities.…”

Section: Introductionmentioning

confidence: 99%

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Photoionization of KCs Molecule: Origin of the Structured Continuum?

Pichler

Beuc

Kokaj

et al. 2020

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We report the experimental observation of photoionization bands of the KCs molecule in the deep ultraviolet spectral region between 200 and 420 nm. We discuss the origin of observed photoionization bands as stemming from the absorption from the ground state of the KCs molecule to the excited states of KCs+ molecule for which we used existing potential curves of the KCs+ molecule. An alternative explanation relies on the absorption from the ground state of the KCs molecule to the doubly excited states of the KCs** molecule, situated above the lowest molecular state of KCs+. The relevant potential curves of KCs** are not known yet, but all those KCs** potential curves are certainly autoionizing. However, these two photoionization pathways may interfere resulting in a special interference structured continuum, which is observed as complex bands.

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Section: Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Photoionization of KCs Molecule: Origin of the Structured Continuum?

Pichler

Beuc

Kokaj

et al. 2020

Atoms

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Electronic transitions in Rb2+ dimers solvated in helium

et al. 2021

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We have measured depletion spectra of the heteronuclear (85Rb87Rb+) dimer cation complexed with up to 10 He atoms. Two absorption bands are observed between 920 and 250 nm. The transition into the repulsive 12Σu+ state of HeRb2+ gives rise to a broad feature at 790 nm (12,650 cm−1); it exhibits a blueshift of 98 cm−1 per added He atom. The transition into the bound 12Πu state of HeRb2+ reveals vibrational structure with a band head at ≤ 15,522 cm−1, a harmonic constant of 26 cm−1, and a spin–orbit splitting of ≤ 183 cm−1. The band experiences an average redshift of − 38 cm−1 per added He atom. Ab initio calculations rationalize the shape of the spectra and spectral shifts with respect to the number of helium atoms attached. For a higher number of solvating helium atoms, symmetric solvation on both ends of the Rb2+ ion is predicted.

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