Wavelengths and Energy Levels of the Upper Levels of Singly Ionized Nickel (Ni ii) from 3d 8(3 F)5f to 3d 8(3 F)9s - Clear, CP; Pickering, JC; Nave, G; Uylings, P; Raassen, T (ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2023)