6.019726411 ± 0.000005848 (amu) [mass excess = 18375.034 ± 5.448 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-28945 ± 2003 (keV) [derived from systematical trend]
Evaluated Data Libraries
Links to the libraries.