When Oak Ridge National Lab physicists use the term "doubly magic," it describes atomic nuclei [NEW-klee-eye] that have greater stability than their neighbors due to having shells that are fully occupied by both protons and neutrons. What nuclear property is maximized to create this effect?

W) Neutron degeneracy [dee-JEN-er-ah-see] pressure

X) Quantum spin

Y) Electron-degeneracy pressure

Z) Nucleon binding energy
Z) NUCLEON BINDING ENERGY