Sodium 3s−3p far wing shapes induced by ground neon atoms

Abstract

This study deals with the broadening of atomic sodium, evolving in a neon buffer gas, in the wavelength and temperature ranges 500 − − 700 nm and 136 − − 3000 K , respectively. The computed emission and absorption spectral profiles are based on the most recent potential energy curves and transition dipole moments. The required electronic Na ( 2 S ) + Ne ( 1 S ) and Na ( 2 P ) + Ne ( 1 S ) potentials are used from two different sets. Then the satellite structures in the blue wing are analysed quantum mechanically. The calculations show especially that the free–free transitions contribute most to the NaNe photoabsorption spectra and a satellite structure is observable beyond the temperature 402 K around the wavelengths 550 nm depending on the used potential set. The obtained results showed good agreement with those already published.