Values of the atomic masses from $n^1$ to ${\mathrm{F}}^{20}$ have been derived from the $Q$-values of nuclear reactions with a procedure of statistical adjustment. Tables are given of several fundamental mass differences, the most probable $Q$-values, and the atomic masses. Some disparity with the mass spectroscopic results is noted.

• Received 16 April 1951

DOI:https://doi.org/10.1103/PhysRev.83.512