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Open AccessArticle

Photoionization of KCs Molecule: Origin of the Structured Continuum?

1
Institute of Physics, 10000 Zagreb, Croatia
2
Department of Physics, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
3
Institute for Physical Research, Armenian Academy of Science, Ashtarak 0203, Armenia
*
Author to whom correspondence should be addressed.
Atoms 2020, 8(2), 24; https://doi.org/10.3390/atoms8020024
Received: 30 April 2020 / Revised: 22 May 2020 / Accepted: 26 May 2020 / Published: 28 May 2020
(This article belongs to the Special Issue Atomic and Ionic Collisions with Formation of Quasimolecules)
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. View Full-Text
Keywords: photoionization; alkali molecule; autoionization of molecule; heteronuclear molecule photoionization; alkali molecule; autoionization of molecule; heteronuclear molecule
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MDPI and ACS Style

Pichler, G.; Beuc, R.; Kokaj, J.; Sarkisyan, D.; Jose, N.; Mathew, J. Photoionization of KCs Molecule: Origin of the Structured Continuum? Atoms 2020, 8, 24. https://doi.org/10.3390/atoms8020024

AMA Style

Pichler G, Beuc R, Kokaj J, Sarkisyan D, Jose N, Mathew J. Photoionization of KCs Molecule: Origin of the Structured Continuum? Atoms. 2020; 8(2):24. https://doi.org/10.3390/atoms8020024

Chicago/Turabian Style

Pichler, Goran; Beuc, Robert; Kokaj, Jahja; Sarkisyan, David; Jose, Nimmy; Mathew, Joseph. 2020. "Photoionization of KCs Molecule: Origin of the Structured Continuum?" Atoms 8, no. 2: 24. https://doi.org/10.3390/atoms8020024

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