Eur. Phys. J. D 36, 49-55 (2005)
https://doi.org/10.1140/epjd/e2005-00232-4

The D¹Π state of the NaRb molecule^*

¹ Department of Physics and Institute of Atomic Physics and Spectroscopy, University of Latvia, Rainis Boulevard 19, 1586 Riga, Latvia
² Department of Physics, Sofia University, James Bourchier blvd 5, 1164 Sofia, Bulgaria
³ Institut für Quantenoptik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany

Corresponding author: ^a ferber@latnet.lv

Received: 12 May 2005
Revised: 18 July 2005
Published online: 17 August 2005

Abstract

We present a detailed experimental study of the D¹Π state of the NaRb molecule by means of Fourier transform spectroscopy of laser induced fluorescence. The entire data field for the D¹Π state of Na⁸⁵Rb and Na⁸⁷Rb consists of rovibrational levels with and . The data were incorporated into a direct fit of a single potential energy curve to the level energies using the Inverted Perturbation Approach method. The D¹Π state q factors, which describe the -doubling, have been obtained in a wide range of rotational and vibrational quantum numbers. Analysis revealed several perturbation regions in the D¹Π state.