Isotope shifts and accurate wavelengths in Ne II and Ne III

摘要: Transition isotope shifts of 3s–3p transitions in Ne II and III are measured Fourier transform spectra from a hollow-cathode source. Accurate absolute line-center positions the 20Ne derived for purpose tertiary wavelength standards region 2000–5000 A. A robust statistical treatment is applied, yielding line-position uncertainties that lower than Ar secondary used as references. The influence Stark on both new also investigated. In addition, improved wavenumbers 3p–3d 3p–4s presented, which 12 have been first time.