Measurement of the Ar(1sy) state densities by two OES methods in Ar-N2 discharges

Abstract

In this work, results from two methods for the determination of the Ar(1sy) densities are compared in an Ar–N2 discharge. These methods involve measurements of optical emission spectroscopy (OES). The first method (band method) uses the bands belonging to the N2(C → B) second positive system, while the second method (branching fraction method) uses the line intensities corresponding to the Ar(2px → 1sy) transitions. These techniques were tested in the negative glow of dc discharge and the results show remarkable agreement.