Quantal studies of sodium 3 p ← 3 s photoabsorption spectra perturbed by ground lithium atoms

Abstract

The pressure broadening in the far wings, where the sodium Na ( 3 p ← 3 s ) resonance line is perturbed by ground lithium Li (2s) atoms, has been theoretically analyzed. The NaLi potential–energy curves and the transition dipole moments are constructed by using a reliable ab initio data points to carry out the reduced-absorption coefficients k r ( ν , T ) . This quantum-mechanical investigation have demonstrated that the NaLi profile spectra show a satellite future in the red wing at wavelength λ =685 nm in the temperature range 4000 K–1.8×104 K. The computation could also exhibit a second satellite, in the blue wing, near the wavelength λ =574 nm beyond 6000 K and a third peak located at λ =490 nm which begins to appear at 1.8×104 K.

Li(2p ← 2s) + Na(3s) pressure broadening in the far-wing and line-core profiles

“…Over the last few years, our group has simulate quantum-mechanically the photoabsorption spectra of alkali-metal atoms broadened by collision with like, unlike or rare-gas atoms. In our recent paper, [13] we have carried out the absorption spectra of a radiating sodium atoms Na (3p ← 3s) perturbed by ground lithium Li (2s) atoms. The current paper is concerned with the quantal study of pressure-broadening phenomena which affects the Li (2p ← 2s) resonance line in the wings and core when the lithium atoms are interacting with ground sodium Na (3s) atoms.…”