Lu and Pr beam development for resonance ionization laser ion sources

Resonance Ionization Laser Ion Sources (RILIS) are efficient and element selective ion sources, which are well suited for radioactive ion beam facilities. Using TRIUMF's off-line laser ion source test stand with a system of tunable titanium sapphire (Ti:Sa) lasers, laser resonance ionization schemes for lutetium (Lu) and praseodymium (Pr) have been investigated with a particular focus on autoionizing states. New ionization schemes via Rydberg states and autoionizing states were found and compared at the off-line test stand. The data from on-line RILIS delivery of Lu radioactive isotopes is presented. [Display omitted] •New resonant ionization schemes for Lu and Pr have been found and compared.•Observed a temperature dependence of the ionization efficiency of Rydberg states of Lu•Rydberg state scheme was found infeasible on ion-guide laser-ion-source (IG-LIS).•Multi-photon ionization of molecules was observed with a 532 nm pulsed laser.