VITENDF70.BOLIB - An ENEA-Bologna Fine-Group Coupled (199 n + 42 γ) Cross Section Library in AMPX Format Based on ENDF/B - VII.0 Data

The ENEA-Bologna Nuclear Data Group produced the VITENDF70.BOLIB multi-group coupled (199 n + 42 γ) cross section library in AMPX format, based on the ENDF/B- VII.0 US evaluated nuclear data library. The generation of the VITENDF70.BOLIB library for nuclear fission applications was conceived as an updating of the ENDF/B-VI Release 3 VITAMIN-B6 library generated at ORNL. The present library has the same neutron/photon energy group structures and general features as VITAMIN-B6 and was produced using similar data processing methodologies, based on the NJOY- 99.259 and SCAMPI nuclear data processing systems. VITENDF70.BOLIB is a pseudo-problem-independent library based on the Bondarenko (f-factor) method for the treatment of neutron resonance self-shielding and temperature effects. The library contains 183 nuclides processed at 4 temperatures (300 °K, 600 °K, 1000 °K and 2100 °K), obtained for the most part with 6 to 8 values for the background cross section. Thermal scattering cross sections were processed at all the temperatures available in the ENDF/B-VII.0 thermal scattering law data file for 6 additional bound nuclides: H-l in light water, H-l in polyethylene, H-l in zirconium hydride, H-2 in heavy water, C in graphite and Be in beryllium metal. From VITENDF70.BOLIB it is possible to generate, through the ENEA-Bologna 2007 Revision of SCAMPI, collapsed working libraries of self-shielded cross sections in the AMPX or FIDO-ANISN formats.