Please note that the Q values listed here are calculated Q values. For the purpose of determining if a nucleus is stable with respect to beta decay, it is more accurate to use experimental masses, if such masses are available. For beta plus and electron-capture (EC) decay we list only the Q value for EC decay.
The entire data file of calculated Q values for
β- decay Qβ-
and Q values for β+ decay
Qβ+ may be downloaded by clicking
here. The format of the file is,
in FORTRAN notation (2I5,2F10.2), and each record contains:
If the Q value cannot be calculated because the ground-state masses required for the determination were not calculated then the value -20000.00 is listed.