Integral Activation Cross Section Ratios of Ti(n,x)Sc-46, Ti(n,x)Se-47, Ti-48(n,p)Sc-48, Ti-50(n,α)Ca-47 Relative to A1-27(n,α)Na-24 in the Neutron Spectrum Produced by 23.2 MeV Deuterons Incident on a Thick Be Metal Target

Integral activation cross section ratios have been measured for Ti (n,x)Sc46, Ti (n,x)Sc47, Ti48 (n,p)Sc48 and Ti50 (n,α)Ca47 relative to A127 (n,α)Na24 in the neutron spectrum produced by 23.2 MeV deuterons incident on a thick metal Be target. Validation of these cross sections in a high energy neutron continuum is the object of this work. The neutron spectrum in the irradiation site has been obtained in a previous work and tested by the excellent agreement (1-3%) between experimental and ENDF-B/V or VI calculated fission ratios to U235. Evaluated activation cross section libraries have been used to calculate the titanium integral activation cross sections in the irradiation spectrum. In addition a new group of experimental differential data, non evaluated, published from 1990 to 1992 (Juelich, Geel, ANL) was also used to calculated the integral cross sections. A comparison of the Ti isotopes experimental integral cross section with the calculated values shows an excellent agreement with the new set of non evaluated data and poor agreement with the evaluated libraries. Cf252 spectrum averaged cross section shows similar behaviour. (author)