DLC-0021 ZZ-KXRAY.

ZZ-KXRAY.

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FORMAT: values are tabulated in units of barns/atom as a function of energy (keV)

NUMBER OF GROUPS: Experimental X-ray attenuation cross sections for energies between 0.1 keV and 1 MeV.

NUCLIDES: H, He, Li, Be, B, C, N, O, F, Ne, Na, Mg, Al, Si, P, S, Cl, Ar, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, Np, Pu.

ORIGIN: 153 papers containing approximately 9000 values (from 1920 through 1970)

WEIGHTING SPECTRUM: --

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For use in general purpose X-ray transport codes. The energy range is from 0.1 keV to 1 MeV. The library provides data in an energy region  not covered  by  DLC-7 and DLC-15.

Experimental X-ray attenuation cross sections for 94 elements for energies between 0.1 keV and 1 MeV were obtained for the period from 1920 through 1970. Exact photoelectric absorption values also were calculated for hydrogen. Scattering cross sections were calculated by relativistic SCF methods. These were subtracted from total attenuation data, and the resulting photoelectric and measured photoelectric absorption cross sections from 1 keV to 1 MeV were fitted by a least-squares procedure to obtain best values. Interpolations were made for elements and energy ranges for which there were no experimental data. In addition, from 0.1 keV to between 1 keV and 10 keV non-relativistic, self-consistent, independent electron theory was used to calculate photoelectric absorption cross sections. Thus, for this energy range, values based on least-squares fits and on calculations are given, with the calculated values recommended. Scattering values were added to all photoelectric cross sections to obtain a best set of attenuation cross sections.

Values are tabulated in units of barns/atom as a function of energy (keV). Data are given for photoelectric, coherent scattering, incoherent scattering, the absorption component of incoherent scattering and total attenuation.

To list the entire library using RDXRAY requires approximately 5 minutes on the IBM 360/75.

RDXRAY reads and lists the contents of a tape containing DLC-21.

DLC-7 and DLC-15 are similar RSIC data collections, but their energy range extends only to 1 keV.

• W. J. Veigele et al., "X-Ray Cross Section Compilation from 0.1 keV to 1 MeV, Vol. II, Rev. 1: Input Data and Supplemental Results," DNA 2433F (KN-71-431(R)) (July 1971).

• E. Briggs and W. J. Veigele, "Supplementary Report to X-Ray Cross Section Compilation from 0.1 keV to 1 MeV," DNA 2433F (K-72-431(SR)) (August 1972).

Kaman Science Corporation
Colorado Springs, Colorado, U.S.A.