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Observation of the K2 4Δg state by cw perturbation-facilitated optical-optical double resonance spectroscopy |
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| Authors: | J. Magnes,C. Goldberg,Sylvie Magnier,Monique Aubert-Fré con,Li Li |
| Affiliation: | a Physics Department, Temple University, 1900 N. 13th St., Philadelphia, PA 19122-6082, USA b IUFM de Bretagne, 153 Rue Saint Malo, CS 54310 F-35042 Rennes Cedex, France c Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces (PA.LMES), CNRS et Université Rennes I (UMR6627), Campus de Beaulieu, Bât. 11B, F-35043 Rennes Cedex, France d Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM), CNRS et Université Lyon I (UMR5579), Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne Cedex, France e Department of Physics and Key Lab of Atomic and Molecular Nanosciences, Tsinghua University, Beijing 100084, China |
| Abstract: | This paper reports for the first time both, an experimental observation and theoretical calculations of the K2 43Δg state. For the experiment we used cw perturbation-facilitated optical-optical double resonance (PFOODR) spectroscopy. A single mode Ti-sapphire laser and a dye laser served as the pump and probe lasers, respectively. A total of 55 PFOODR signals have been assigned to the 43Δg ← b3Πu transitions. Absolute vibrational numbering was determined by using quantum defect analysis combined with comparing observed intensities with calculated Franck-Condon factors (FCF). For the former we used known parameters from the 23Δg state since the 23Δg and the 43Δg states belong to the same Rydberg series. We report here our experimental and calculated spectroscopic constants, the corresponding RKR potential energy curve, the Franck-Condon table for the 43Δg ↔ b3 Πu system, as well as a comparison with the theoretical potential energy curve. The Te value is found to be 28408.938(52) cm−1. |
| Keywords: | K2 K2 triplet state 43Δg Rydberg state |
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