Hubbell and S. Seltzer Tables and graphs of computed photon mass attenuation coefficients and mass energy-absorption coefficients from 1 keV to 20 MeV are presented for all of the elements (Z = 1 to 92) and for 48 compounds and mixtures of radiological interest. These coefficients are basic quantities used in calculations of the penetration and the energy deposition by photons (x-ray, gamma-ray, bremsstrahlung) in biological, shielding, and other materials. Berger and J. Hubbell This database can be used to calculate photon cross sections for scattering, photoelectric absorption and pair production, as well as total attenuation coefficients, in any element, compound or mixture, at energies from 1 keV to 100 GeV. This is a web version of the PC based program XCOM (also called NIST Standard Reference Database 8 - XGAM). Hubbell This bibliography contains papers (1907-1995) reporting absolute measurements of photon (XUV, x-ray, gamma-ray, bremsstrahlung) total interaction cross sections or attenuation coefficients for the elements and some compounds used in a variety of medical, industrial, defense, and scientific applications.

The energy range covered is from 10 eV to 13.5 GeV. Chantler The primary interactions of x-rays with isolated atoms from Z = 1 (hydrogen) to Z = 92 (uranium) are described and computed within a self-consistent Dirac-Hartree-Fock framework. The results are provided over the energy range from either 1 eV or 10 eV to 433 keV, depending on the atom. Self-consistent values of the f1 and f2 components of the atomic scattering factors are tabulated, together with the photoelectric attenuation coefficient [ µ/ρ] PE and the K-shell component [ µ/ρ] K, the scattering attenuation coefficient [ µ/ρ] (coh + inc), the mass attenuation coefficient [ µ/ρ] tot, and the linear attenuation coefficient [ µ] tot, as functions of energy and wavelength. Also, f2, [ µ/ρ] PE, [ µ/ρ] tot, and [ µ] tot are available for compounds. Deslattes, E. Kessler, Jr., P.

Gerward, L., Guilbert, N., Jensen, K.B. And Levring, H. (2004) WinXCom—A Program for Calculating X-Ray Attenuation Coefficients. Radiation Physics. Published tables of mass attenuation coefficients for elements, mixtures, and compounds for energies ranging from 1 keV to 20 MeV. Berger and Hubbell [2] developed the XCOM computer program for calculating cross-section and attenuation coefficients for elements, compounds, and mixtures for photon energies from 1 keV to 100 GeV.

Indelicato, L. Lindroth, and J. Kartochki dlya igri krokodil svoimi rukami.

Anton This X-ray transition table provides the energies and wavelengths for the K and L transitions connecting energy levels having principal quantum numbers n = 1, 2, 3, and 4. 1s 77 kryak. The elements covered include Z = 10, neon to Z = 100, fermium. There are two unique features of this database: (1) all experimental values are on a scale consistent with the International System of measurement (the SI) and the numerical values are determined using constants from the most recent and (2) accurate theoretical estimates are included for all transitions.

NXcom – A program for calculating attenuation coefficients of fast neutrons and gamma-rays NXcom – A program for calculating attenuation coefficients of fast neutrons and gamma-rays El-Khayatt, A.M. 2011-01-01 00:00:00 This work is concerned with a construction and use of NXcom computer program for calculating the removal and attenuation coefficients of transmitted fast neutrons and γ-rays, respectively, through mixtures, composites, concretes and compounds. The program uses only one input data file for neutrons and γ-rays calculations. For γ-ray attenuation, the program predictions were tested by comparing them with the well-known WinXcom program results and an excellent agreement was noticed. Also, it has been used for calculating the values of macroscopic effective removal cross-sections Σ R (cm −1 ) for five new published polyamide and anhydride composites designed for shielding mixed neutron and γ-rays. The obtained values for Σ R using the program and the reported attenuation thicknesses which were based on the Monte Carlo N-Particle (MCNP) code showed the same trend.