Level energy(keV) Spin & Parity
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ground state
Mass (The Ame2012 atomic mass evaluation (II) by M.Wang, G.Audi, A.H.Wapstra, F.G.Kondev, M.MacCormick, X.Xu, and B.Pfeiffer
Chinese Physics C36 p. 1603-2014, December 2012)
269.144752124 ± 0.000033728 (amu) [mass excess = 134835.736 ± 31.418 (keV) ]
Evaluated Data Libraries
Links to the libraries.