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Electronic structure and rovibrational predissociation of the 2^1Π state in KLi

Abstract

Adiabatic potential energy curves of the 3^1Σ^+, 3^3Σ^+, 2^1Π and 2^3Π states correlating for large internuclear distance with the K(4s) + Li(2p) atomic asymptote were calculated. Very good agreement between the calculated and the experimental curve of the 2^1Π state allowed for a reliable description of the dissociation process through a small (∼20 cm−1 for J = 0) potential energy barrier. The barrier supports several rovibrational quasi-bound states and explicit time evolution of these states via the time-dependent nuclear Schrödinger equation, showed that the state populations decay exponentially in time. We were able to precisely describe the time-dependent dissociation process of several rovibrational levels and found that our calculated spectrum matches very well with the assigned experimental spectrum. Moreover, our approach is able to predict the positions of previously unassigned lines, particularly in the case of their low intensity.

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Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS no. 20, edition 27, pages 18663 - 18670,
ISSN: 1463-9076
Language:
English
Publication year:
2018
Bibliographic description:
Jasik P., Kozicki J., Kilich T., Sienkiewicz J., Henriksen N.: Electronic structure and rovibrational predissociation of the 2^1Π state in KLi// PHYSICAL CHEMISTRY CHEMICAL PHYSICS. -Vol. 20, iss. 27 (2018), s.18663-18670
DOI:
Digital Object Identifier (open in new tab) 10.1039/c8cp02551g
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