Tables and graphs of photon interaction cross sections from 1.0 keV to 100 MeV derived from the LLL Evaluated Nuclear Data Library

Energy-dependent evaluated photon interaction cross sections and related parameters are presented for the elements H through Cf (Z = 1 to 98). Data are given over the energy range from 1 keV to 100 MeV. The related parameters include form factors and average energy deposits per collision (with and without fluorescence). Fluorescence information is given for all atomic shells that can emit a photon with a kinetic energy of 1 keV or more. In addition, the following macroscopic properties are given: total mean free path and energy deposit per centimeter. This information is derived from the Livermore Evaluated Nuclear Data Library (ENDL) as of Oct. 1975. (auth

Integrated system for production of neutronics and photonics calculational constants. Volume 5, Part B. Relativistic transformations between center-of-mass and laboratory systems for two-body nuclear reactions

A technique is described for transforming cross sections and secondary-particle energies between center-of-mass and laboratory systems for two-body nuclear reactions. The derivations of the relativistic transformations needed for this technique are also reviewed

GAMIDEN: a program to aid in the identification of unknown materials by gamma-ray spectroscopy

The intent of the computer code GAMIDEN is to help identify isotopes by their gamma-ray emissions and thus to assist in the nondestructive assay of unknown materials. From both radioactive decays and neutron captures, GAMIDEN searches GAMTOT78, a file of gamma-ray spectra, for matches with observed photon energies. This report describes the search procedure, outlines the use of the code, and gives an example. The code is designed to operate on the CRAY 1 computer at Lawrence Livermore National Laboratory (LLNL). It is written in standard Fortran (ANSI) for the most part but contains some LRLTRAN instructions to make use of the Livermore time-sharing system (LTSS). The code uses about 545,000 words of memory. Typical problems run in about 45 s. The source program and the data file are available on request

Data testing results for the ENDF/B-V Evaluated Neutron Data File. [20 spheres pulsed with 14-Mev neutrons]

The ENDF/B-V Evaluated Neutron Data File has been tested for validity by comparing calculated and experimental values of k/sub eff/ for 66 critical assemblies and emission neutron spectra for 20 spheres that were pulsed with 14-MeV neutrons. 20 figures, 7 tables

Flux weighted group cross sections based on the ACTLMFE data file. [GPC, for Cray-1]

A code, GPC, calculates flux-weighted group cross sections for up to 200 groups weighted by flux with up to 200 entries from the ACTLMFE data file, which is an ASCII form of the LLNL ACTL neutron activation cross section library

Integrated system for production of neutronics and photonics calculational constants. Volume 15, Part D, Rev. 1. The LLL Evaluated Nuclear Data Library (ENDL): descriptions of individual evaluations for Z = 0--98

Descriptions of evaluated nuclear data sets for 86 isotopes in the range Z = 0 to 98 are presented. The evaluation procedures that were used are discussed. At the beginning of the discussion for each individual isotope, a computer-generated listing is given which summarizes the main properties of the data sets that are contained in the evaluation