77-Ir-199  basic  element

77-iridium-199 Atomic Mass: 198.9737872 +- 0.0000442 amu Excess Mass: -24417.100 +- 41.214 keV Binding Energy: 1570369.127 +- 41.215 keV Beta Decay Energy: B- 2990.977 +- 41.003 keV "The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.