Pulsed ion source for laser spectroscopy: Application to Nb II

Abstract

A novel pulsed ion source suitable for laser spectroscopy on any metallic element is described. The source is based on a large-bore low-pressure hollow-cathode discharge. The first direct radiative lifetime measurements in Nb II are reported. Radiative lifetimes for ${z}^{5}G$ and ${z}^{3}D$ levels of Nb II are determined using time-resolved laser-induced fluorescence on a Nb II ion beam.