The $Q$ values for the ($d, p$) reactions on some 27 targets whose neutron numbers are around the closed shells of 50 and 82 neutrons were determined. The general interpretation of these results and the specific application of these results to a variety of problems is discussed. In general, the results show a break of approximately 2 Mev at each of the shell edges. The technique used was that of a NaI scintillation spectrometer and is described in some detail. Comparison is also made with previous measurements by different techniques.

• Received 9 July 1954

DOI:https://doi.org/10.1103/PhysRev.96.664