Measurement of Dysprosium Stark Width and the Electron Impact Width Parameter

Abstract

In this work, we suggest a methodology to determine the impact parameter for neutral dysprosium emission lines from the characterization of the plasma generated by laser ablation in a sealed chamber filled with argon. The procedure is a combination of known consistent spectroscopic methods for plasma temperature determination, electron density, and species concentration. With an electron density of 3.1 × 1018 cm–3 and temperature close to 104 K, we estimated the impact electron parameter for nine spectral lines of the neutral dysprosium atom. The gaps in the impact parameter data in the literature, mainly for heavy elements, stress the importance of the proposed method.

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…Likewise, the n e varied between 0.01 × 10 17 and 1.3 × 10 17 cm −3 . dos Santos et al 66 determined the impact parameter for Dy I emission lines in an LA plasma in Ar, and determined an n e of 3.1 × 10 18 cm −3 and T e ∼ 10 000 K. They highlighted the incomplete data for impact parameters of heavy elements in the literature, which their method aimed to address.…”

Creation and spatial-temporal characterization of gas targets and plasmas for laser-electron acceleration

“…It is also possible to estimate the plasma temperature evolution. To be able to do this, a local thermal equilibrium (LTE) has to exist attending the McWhirter criterion [237,238] :…”