Research with CRYRING@ESR

Dielectronic-recombination (DR) spectra of highly-charged W${}^{𝑞+}$ and Ir${}^{𝑞+}$ ions have been measured by employing the Electron-Beam Ion Trap (EBIT) at National Institute of standards and Technology [1] and the Main Magnetic Focus Ion Trap (MaMFIT) [2] at Justus-Liebig Universität Gießen, respectively, over wide ranges of electron-beam energies. A series of DR resonances involving transitions between 2𝑙 → 3𝑙′ and 2𝑙 → 4𝑙′ subshells in Na-like through Ar-like tungsten have been revealed in the NIST EBIT spectra, while in the MaMFIT, DR resonances involving transitions between 2𝑙 → 3𝑙′ subshells in K-like through Ni-like iridium were seen. Detailed modeling of the observed spectra has been performed.