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Study of excited electronic states of the 39KCs molecule correlated with the K(42S) + Cs(52D) asymptote: experiment and theory

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dc.abstract.enUsing the polarisation labelling spectroscopy, we performed the detailed analysis of the level structure of excited electronic states of the 39 KCs molecule in the excitation energy interval between 17500 cm−1 and 18600 cm−1 above the v = 0 level of the X1 + ground state. We prove that the observed states are strongly coupled by spin-orbit interaction above 18200 cm−1 , as manifested by numerous perturbations in the recorded spectra. The spectra are interpreted with the guidance of accurate electronic structure calculations on KCs, including potential energy curves, transition electric dipole moments, and represen- tation of the spin-orbit interaction with a quasi-diabatic effective Hamiltonian approach. The agreement between theory and experiment is found satisfactory and better than in case of previously available theo- retical data. This study confirms the accuracy of the polarisation labelling spectroscopy to analyse highly- excited electronic molecular states which present a dense level structure.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKowalczyk, Paweł
dc.contributor.authorJastrzębski, Włodzimierz
dc.contributor.authorDulieu, Olivier
dc.contributor.authorBouloufa-Maafa, Nadia
dc.contributor.authorVexiau, Romain
dc.contributor.authorGrochola, Anna
dc.contributor.authorSzczepkowski, Jacek
dc.date.accessioned2024-01-26T08:45:10Z
dc.date.available2024-01-26T08:45:10Z
dc.date.issued2022
dc.description.financePublikacja bezkosztowa
dc.description.volume291
dc.identifier.doi10.1016/J.JQSRT.2022.108330
dc.identifier.issn0022-4073
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/120982
dc.identifier.weblinkhttps://api.elsevier.com/content/article/PII:S0022407322002655?httpAccept=text/xml
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofJournal of Quantitative Spectroscopy and Radiative Transfer
dc.relation.pages108330-1-11
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enLaser spectroscopy
dc.subject.enKCs molecules
dc.subject.enElectronic states
dc.subject.enPotential energy curves
dc.subject.enAb initio calculations
dc.titleStudy of excited electronic states of the 39KCs molecule correlated with the K(42S) + Cs(52D) asymptote: experiment and theory
dc.typeJournalArticle
dspace.entity.typePublication