A simple mass equation is derived and is shown to provide a good description of the masses of the recently measured $T_Z=\frac{5}{2}$ nuclei in the $s-d$ shell. A comparison is made with the method of Garvey et al. and predictions of masses and of the stability of neutron-excess light nuclei are given for both methods.

NUCLEAR STRUCTURE Derived mass equation based on shell model; compared predictions with method of Garvey et al.

• Received 2 December 1974

DOI:https://doi.org/10.1103/PhysRevC.11.2049