ZZ VITAMIN-E, 174-Group Neutron, 38-Group Gamma Cross-Section in AMPX Format

1 - Description of program or function: - Format: AMPX; - Number of groups: 174 neutron and 38 gamma-ray groups Nuclides: H, He, Li, Be, B, C, N, O, F, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Ga, Y, Zr, Nb, Mo, Cd, Sn, I, Cs, Ba, Gd, Hf, Ta, W, Re, Pt, Au, Pb, Bi, Th, Pa, U, Np, Pu, Am, Cm. - Origin: ENDF/B-V; - Weighting spectrum: From 10-5 eV to 0.414 eV → Maxwellian Thermal Spectrum; From 0.414 eV to 2.12 MeV → '1/E' Slowing-Down Spectrum; From 2.12 MeV to 10.0 MeV → Fission Spectrum; From 10.0 MeV to 12.52 MeV → '1/E' Spectrum; From 12.52 MeV to 15.68 MeV → Velocity Exponential Fusion Peak; From 15.68 MeV to 19.64 MeV → '1/E' Spectrum; Photon interaction cross sections → constant in energy. The early phases of this new cross-section library were focused on materials for fast reactor applications and were applied to benchmark testing of ENDF/B-V. More recently, requests have been made for additional materials to be added to the basic library for fusion and weapons radiation transport applications. The library is expected to perform well for radiation transport problems where thermal up-scatter is not important. The energy structure of VITAMIN-E contains 174 neutron and 38 gamma-ray groups and includes the 171 neutron and 36 photon groups of VITAMIN-C as a subset. The group structure has fine detail in the energy region where cross section minima occur for important shielding materials. 2 - Method of solution: The 174 neutron group data were processed with MINXI5; the 174 neutron, 38 photon group data were processed with LAPHNGAS (AMPX III); and the 38 gamma-ray group data with SMUG (AMPX III) from DLC-99/HUGO. The ENDF/B-V special purpose dosimetry, activation, and gas production files have also been processed into the VITAMIN-E group structure using XLACS2, NITAWL, and WORM