We use spectral distribution methods to calculate proton occupancies in ground states of nuclei in the range $A=60-80\mathrm{}$, and show that these results indicate structural changes around $N=40-44\mathrm{}$.

NUCLEAR STRUCTURE Spectral distribution calculations of ground state proton occupation numbers in Zn, Ge, Se, and Kr nuclei.

• Received 17 April 1981

DOI:https://doi.org/10.1103/PhysRevC.25.1667