Nuclear Q_β-values obtained at Osiris. A comparison with Mass Formula Predictions

Abstract

The shape of the nuclear mass surface far out on the neutron-rich side of β-stability is of considerable interest because of many interesting applications, e.g. theories about the r-process in nucleosynthesis. Until now, direct mass determinations have been performed in very few cases¹⁾. Most studies of the mass surface have been carried out by the method of determining mass differences from measurements of total β-decay energies. The latter method has been used at Studsvik for a systematic investigation covering about 40 fission products in the mass ranges A = 75 - 89 and A = 120 - 135 and including isotopes of zinc, gallium, germanium, arsenic, indium, tin, antimony, and tellurium^2-6).