Superheating effects in line broadening of dense alkali vapors

23rd International Conference on Spectral Line Shapes

Pichler, G.^1 ; Makdisi, Y.^1 ; Kokaj, J.^1 ; Mathew, J.^1 ; Raki, M.^2 ; Beuc, R.^2

Department of Physics, University of Kuwait, Kuwait^1

Institute of Physics, Zagreb, Croatia^2

关键词: Emission coefficient;    Ionization limit;    Line broadening;    Molecular photoionization;    Photoionization process;    Photoionization spectra;    Potential curves;    Two-electron systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/810/1/012013/pdf
DOI  :  10.1088/1742-6596/810/1/012013

来源: IOP

【 摘 要 】

We used the superheating of the dense alkali vapor in order to separate atomic from the molecular photoionization spectrum. Homonuclear and heteronuclear alkali molecules are essentially two electron systems and therefore simultaneous excitation of two atoms above the ionization limit will form autoionizing potential curves which will bring about new bands in the photoionization spectrum. We present a satisfactory comparison between experimental and theoretical emission coefficient function of diffuse bands (cesium dimer excimer) at temperatures up to 1000 °C, where the metal vapor was heavily superheated. New results for Rb2photoionization process reveal similar structured photoionization continuum but with reduced number of photoionization bands.