Excitation functions for (p,n) reactions on 79Br and 127I

Excitation functions for the ⁷⁹Br(p,n)⁷⁹Kr and ¹²⁷I(p,n)¹²⁷Xe reactions have been determined from 3 to 25 MeV by the activation method. KBr and KI targets of natural isotopic abundances were encapsulated in Mylar to prevent escape of the gaseous ⁷⁹Kr and ¹²⁷Xe. Disintegration rates were obtained by assaying selected γ rays with calibrated Ge (Li) detectors; beam intensities were determined with a Faraday cup. The measured absolute cross sections have uncertainties of less than 10% with energy uncertainties of <~ 100 keV. The excitation functions are compared to Monte Carlo calculations based on an intranuclear-cascade statistical-evaporation model. [NUCLEAR REACTIONS ⁷⁹Br(p,n)⁷⁹Kr and ¹²⁷I(p,n)¹²⁷Xe, E=3-25 MeV; measured σ(E). Natural targets, Ge(Li) detector.]