[en] 1 - Description of problem or function: Format: AMPX, CCCC format. Number of groups: 171 neutron, 36 gamma-ray group cross section; Nuclides: H, He, Li, Be, B, C, N, O, F, Na, Mg, Al, Si, P, S, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Ag, Cd, Sn, Eu, Ta, W, Pb, Th, U, Pu, Am Origin: ENDF/B; Weighting spectrum: - Maxwellian thermal spectrum (300 K) up to 0.125 eV; - 1/E slowing down spectrum to 820.8 KeV; - fission spectrum to 10.0 MeV; - 1/E spectrum to 12.57 MeV; - velocity exponential fusion peak to 15.57 MeV - 1/E spectrum to 17.333 MeV. Gamma cross sections are flat-weighted. ZZ-VITAMIN-C/B is a data library containing 171 neutron, 36 gamma-ray group cross section data for fusion and LMFBR neutronics. The weighting function for the neutron data consists of six regions: a Maxwellian thermal spectrum (300 K) up to 0.125 eV, a 1/E slowing down spectrum to 820.8 KeV, a fission spectrum to 10.0 MeV, a 1/E spectrum to 12.57 MeV, a velocity exponential fusion peak to 15.57 MeV, and a 1/E spectrum to 17.333 MeV. The gamma cross sections are flat-weighted. The Legendre expansion order is P3. Data are available in the form of a 171 neutron group AMPX interface, a 171 neutron 36 gamma- ray production AMPX interface, and a 36 group gamma-ray interaction AMPX interface. The neutron data are also available in CCCC format as ISOTXS neutron cross section and BRKOXS self-shielding factor standard interface files. Data exists for 60 nuclides used in proposed fusion or fission/ fusion hybrid systems. 2 - Method of solution: The data has been computed from ENDF/B files using the program MINX. The Bondarenko method is employed to create group dependent resonance self-shielding factors to account for temperature and dilution effects. The fractional error tolerances were set to 0.5 percent, and 0.1 percent for integration