On Analysis of Laser Plasma Aluminum Monoxide Emission Spectra

Abstract

This work communicates analysis of aluminum monoxide, AlO, laser-plasma emission records using line strength data and the ExoMol astrophysical database. A nonlinear fitting program computes comparisons of measured and simulated diatomic molecular spectra. Predicted cyanide spectra of the AlO, $\mathrm{B}{}^2{\Sigma }^{+}⟶\mathrm{X}{}^2{\Sigma }^{+}$, $\Delta \mathrm{v}=0,\pm 1,\pm 2,+3$ sequences and progressions compare nicely with 1 nanometer resolution experimental results. The analysis discusses experiment data captured during laser ablation of Al${}_2$O${}_3$ with 266-nm, 6-mJ pulses. The accuracy of the AlO line strength data is better than one picometer. This work presents as well comparison of the ${}^{27}$Al${}^{16}$O line strength and of ExoMol data for spectral resolutions of 0.1 nm and 0.07 nm. Accurate AlO databases show a volley of applications in laboratory and astrophysical plasma diagnosis.

12 pages, 3 figures