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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 120, 2022 - Issue 19-20: Special Issue of Molecular Physics in Memory of Lutosław Wolniewicz
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Special Issue of Molecular Physics in Memory of Lutosław Wolniewicz

Study of the 71Π u state of sodium dimer by polarisation labelling spectroscopy

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Article: e2027536 | Received 19 Nov 2021, Accepted 03 Jan 2022, Published online: 20 Jan 2022
 

Abstract

Two-colour polarisation labelling experiment measuring excitation spectra of Na2 in the spectral range 34, 600−39, 400 cm1 has furnished observation of the previously unknown 71Πu electronic state. The excited state is characterised by a set of Dunham coefficients describing the f parity levels up to vibrational level v = 28 and the corresponding potential energy curve is constructed by the inverted perturbation approach method. Molecular parameters determined in the fit include Te=36583.86 ± 0.03 cm1, ωe=107.50 ± 0.03 cm1 and Re=3.640 ± 0.001 Å.

GRAPHICAL ABSTRACT

Acknowledgments

This article is dedicated to the late Professor Lutosław Wolniewicz in recognition to his outstanding contribution to quantum chemistry and molecular physics.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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