ANITA-IEAF intermediate energy neutron activation package: updating and validation of the decay and cross section data libraries

ANITA-IEAF is an activation package (code and libraries) developed in the past in ENEA-Bologna in order to assess the activation of materials exposed to neutrons with energies greater than 20 MeV. It is suitable to be applied to the study of the irradiation effects on materials in facilities like the International Fusion Materials Irradiation Facility (IFMIF) and, more recently, the DEMO Oriented Neutron Source (DONES), in which a considerable amount of neutrons with energies above 20 MeV is produced. The original package contained: a) the activation code ANITA-IEAF, able to manage the large amount of reactions with threshold higher than 20 MeV and up to 150 MeV, b) the activation cross section library based on the Intermediate Energy Activation File IEAF-2001, c) the Decay, Hazard and Clearance data library (file fl1) containing the quantities describing the decay properties of unstable nuclides and d) the Gamma library (file fl2) containing the gamma ray spectra emitted by the radioactive nuclei. The ANITA-IEAF package has been recently updated. The data contained in the fl1 and fl2 files are actually based on the JEFF-3.1.1 Radioactive Decay Data Library. The updated code uses the EAF-2010 group-wise neutron activation cross section library “eaf_n_gxs_211_flt_20010” in the VITAMIN-J+ (211 energy groups structure) up to 55 MeV . In this report the validation effort related to the comparison between the code predictions and the activity measurements obtained from the Karlsruhe Isochronous Cyclotron is presented.