Yield of deep spallation products of medium to heavy mass targets bombarded with 480 MeV protons

Abstract

Absolute cross sections for short-lived alpha emitting, very neutron deficient nucleides resulting from the interaction of 480 MeV protons with several medium mass targets (Ho, Tm, Re, Ta, Au) have been measured at the TRIUMF facility (Vancouver, Canada). Activities were transported using a gas jet system and relative transport efficiencies for products of various Z were measured. Calculations for the production of such deep spallation products were performed using the empirical Silberberg–Tsao method and the more fundamental, intranuclear cascade – evaporation model, and compared against the observed values.