Replication Data for: Study of thorium in hypersonic gas jets: Ionization potentials of Th and Th+

Experimental data of laser spectroscopy studies of two isotopes of thorium (232Th and 229Th) performed at the IGLIS laboratory at the instituut voor Kern- en Stralingsfysica, KU Leuven in 2023. These studies consisted of Resonance Ionization Spectroscopy measurements (RIS), time-of-flight measurements of photo-ion flight (TOF) and mass measurements using a dipole magnet (MM).

The data consists of a measurement of the (unresolved) hyperfine structure of the 229Th atom using RIS and production of 229Th ions (MM) using alpha recoil sources.

In the case of 232Th, the data contains a MM of the laser ablation source and extensive RIS measurements performed near the first and second ionization potentials.
TOF data under different conditions (electric field, shielding) is included of an autoionizing state and a Rydberg state near the first ionization potential.