EUV photoabsorption investigations of Ti2+, Ti3+ and Ti4+ using dual laser plasma technique

Abstract

The extreme ultraviolet (EUV) photoabsorption spectra of Ti${}^{2+}$, Ti${}^{3+}$ and Ti${}^{4+}$ have been measured by employing the dual laser plasma technique. With the help of the theoretical calculations using the multi-configuration Dirac–Fock (MCDF) method, the prominent transitions of 3s to $n$p for Ti${}^{2+}$ and Ti${}^{3+}$ and the double excitations of 3p${}^2$ to 3d$n$p for Ti${}^{4+}$ are identified, and their transition energies and line profile parameters are determined by fitting the identified photoabsorption features. The reported spectroscopic data of Ti${}^{2+}$, Ti${}^{3+}$ and Ti${}^{4+}$ supplement the fundamental atomic database, serve as benchmarks for theoretical calculations, and hold potential applications in astrophysics and plasma sciences.