Activation cross sections of proton and deuteron induced nuclear reactions on holmium and erbium, related to the production of ${}^{161}$Er and ${}^{160}$Er medical isotopes

Abstract

Experimental excitation functions for long-lived products in proton induced reactions were measured with the activation method in the 37-65 MeV energy range on natural holmium. Stacked foil irradiation technique and high resolution gamma spectrometry were used in order to measure cross-section data for the production of ${}^{161}$Er, ${}^{160}$Er and ${}^{159,157}$Dy. For comparison of the production routes of medically related ${}^{161}$Er and ${}^{160}$Er radioisotopes new experimental cross section data were deduced for the ${}^{162}$Er(p,x)${}^{161,160}$Er and ${}^{162}$Er(d,x)${}^{161,160}$Er reactions by re-evaluating gamma-ray spectra from earlier measurements. No earlier data were found in the literature for these reactions. The experimental data are compared with results of TALYS theoretical code reported in TENDL-2015.