Nuclear spectroscopic information for known nuclides of mass number 199 (Os,Ir,Pt,Au,Hg,Tl,Pb,Bi,Po,At,Rn,Fr) with Z = 76 to 87 and N = 123 to 112 have been evaluated and presented together with adopted energies and Jπ of levels in these nuclei. No excited state data are available for 199Os and 199Fr, and very little information is available for levels in 199Ir, 199Rn and 199At. The decay of 199Ir to 199Pt has not been studied. The decay of the 90-min activity of 199Pb to 199Tl is known in detail but remains unpublished in the open literature, while the decay of the 12.2-min isomer remains mostly unknown. The decays of the two activities of 199Tl to 199Pb are not known as separate decay scheme for each of the activities, thus only a composite decay scheme is presented. Similar is the case for the decay of the two activities of 199Po to 199Bi. In (3He,d) and (α,t) studies for 199Au, disagreements are found between two independent contemporary studies. The most detailed structure known is for 199Pb with five magnetic-rotational (MR) dipole bands together with many other dipole bands which are of probable multi-quasiparticle nature. This work supersedes previous evaluations of A = 199 published in update mode by 1994Ar13; as full A-chain updates by 1988Sc02, 1978Ha12 and 1971Le37; and a mid-stream update of 199Pb nuclide by 2001Si44.
