A critical survey of experimental cross section data, comparison with nuclear model calculations and estimation of production yields of ~(77)Br and ~(77)Kr in no-carrier-added form via various nuclear processes

摘要

Experimentally investigated nuclear reactions for production of no-carrier-added ~(77)Br and ~(77)Kr were critically surveyed. The survey covered nine reactions for the formation of~( 77)Br and six reactions for ~(77)Kr. Both radionuclides are simultaneously produced in many of the studied nuclear processes. The experimental data were compared with the results of nuclear model calculations based on the computer code ALICE-IPPE and the third version of TALYS-based Evaluated Nuclear Data Library, TENDL-2010. Good agreement was found over extended energy regions for the p-, ~3He- and cx-particle induced reactions on several target materials. In case of d-induced reactions, however, considerable discrepancies were noted between the experimental and theoretical data. The concordant sets of experimental cross section data for each reaction were fitted by a polynomial function to obtain a trend curve. From the thus obtained trend curves the yields of both ~(77)Br and ~(77)Kr were calculated. A discussion of suitable production routes is given.