DLC-0041 ZZ-VITAMIN-C.

ZZ-VITAMIN-C.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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 (300K) 10-5 to 0.125eV

• 1/E slowing-down spectrum 0.125eV to 820.8 KeV

• fission spectum 820.8 keV to 10.0 MeV

• 1/E spectrum 10.0 MeV to 12.57 MeV

• velocity exponential fusion peak 12.57 to 15.57 MeV

• 1/E spectrum 15.57 MeV 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 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.

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.

The AMPX and CCCC interface formats allow the user to perform self-shielding and group collapsing to format a problem dependent library for his own use.

Oak Ridge National Laboratory

Oak Ridge, TN 37830, USA