R. A. Naumann, G. Sidenius “The isotope separator program at the Princeton-Pennsylvania accelerator” Nuclear Instruments and Methods 38: 319-322 (1965) https://doi.org/10.1016/0029-554X(65)90164-3.

Abstract: The initial isotope separation program at the Princeton-Pennsylvania Accelerator is outlined. The procedures used for the mass dispersion of mercury and thallium radioisotopes produced in lead targets irradiated with 3 GeV protons are described. Some preliminary nuclear spectroscopic results for the 190, 192 and 194 mass chains are given.