<p> The large double focusing mass spectrometer operating at its theoretical resolving power of more than 100,000 at the base of the peaks has been used to measure five mass spectral doublets. The resulting single and double neutron separation energies for some cadmium nuclides are much more precise than those from previous work. It is noted that striking regularities occur amongst these energies. </p> / Thesis / Master of Science (MSc)