Progress report, 1975

The properties of the exotic nuclides lying off the valley of beta stability are under study and new nuclides continue to be identified. A new ion source for the on-line mass spectrometer for isotope separation allows the investigation of neutron deficient and neutron rich nuclei. A superconducting beta ray spectrometer has been used to study nuclear mass in high energy nuclear beta decay. The Proton Synchrocyclotron is being upgraded to allow acceleration of particles like d, 3He++, and 4He++, to improve proton beam intensity, and to improve the cyclotron operating stability and vacuum system. (E.C.B.)