Abstract
We report precise determination of wavenumbers corresponding to transitions observed in the infrared region of the arc spectrum of202Hg, with an accuracy of about 0.005 cm-1. Isotope shifts of the seven stable isotopes and hyperfine structures (for both odd 199 and 201 isotopes) for excited levels in 6snl(withn⩽10,l=0, 1, 2, 3) andd9s2p(6p') configurations are given with a relative precision of about 0.5%.