RELATIVE AND ABSOLUTE YIELDS IN THE THERMAL NEUTRON FISSION OF U233

Abstract

A ten-inch radius, 90° sector, solid source mass spectrometer was assembled and put into operation. A description of the instrument together with the methods used to determine the fission yields resulting from the thermal neutron fission of U233 are reported. The mass spectrometric techniques have led to the determination of the stable and long-lived isotopes of strontium, yttrium, zirconium, cesium, neodymium, and samarium. Absolute yields were obtained for the cesium and neodymium isotopes by utilizing the isotope dilution technique.