Find the gap between the 1p1/2 and 1d5/2 neutron shells for nuclei with mass number A ≈ 16 from the total binding energy of the 15O (111.9556 MeV), 16O (127.6193 MeV) and 17O (131.7627 MeV) atoms
The 15O nucleus in the 1p1/2 shell is an 16O nucleus deficit in one neutron, its energy being B(15)–B(16), while 17O in the 1 f5/2 shell is an 16O nucleus with a surplus neutron, its energy being B(16)–B(17). Thus the gap between the shells is
