# Ground and First Excited States of the NaSr Molecule: Experimental and Theoretical Study

## TL;DR

This paper studies the NaSr molecule's ground and first excited states using experiments and theory.

## Contribution

The first spectroscopic investigation of the NaSr molecule and its electronic states is presented.

## Key findings

- Spectra of the B(2)2Σ+ → X(1)2Σ+ transition were observed with partial rotational resolution.
- Potential energy curves and transition dipole moments were calculated using two theoretical approaches.
- Molecular constants of the X(1)2Σ+ and B(2)2Σ+ states were deduced from experimental and theoretical comparisons.

## Abstract

We report the first spectroscopic investigation of the
NaSr molecule.
Spectra related to the B(2)2Σ+ →
X(1)2Σ+ transition were observed with
partial rotational resolution by thermoluminescence and laser-induced
fluorescence techniques. Simultaneously, potential energy curves of
the lowest electronic states of NaSr and transition dipole moments
were calculated by using two different theoretical approaches. Comparison
with theoretical results allowed to interpret the experimental spectra
and deduce the salient molecular constants of the X(1)2Σ+ and B(2)2Σ+ states.
Reliability of the employed theoretical methods was tested.