Accession Number : AD0688852

Title :   CHARGE CODE FOR SPACE RADIATION SHIELDING ANALYSIS,

Corporate Author : MCDONNELL DOUGLAS ASTRONAUTICS CO SANTA MONICA CALIF WESTERN DIV

Personal Author(s) : Yucker,W. R. ; Lilley,J. R. ; Langley,R. W. ; Klevatt,P. L.

Report Date : APR 1969

Pagination or Media Count : 214

Abstract : The report describes CHARGE, a FORTRAN IV program for the analysis of primary electron and proton or heavy charged particle passage through plane or spherical shields containing up to 100 regions, and the attendant generation and transmission of electron-induced X-rays (bremsstrahlung) and proton-induced secondary protons and neutrons. Proton and electron analyses use a modification of the range-energy relationship applied to as many as 100 energy groups, while the bremsstrahlung transmission calculation assumes an exponential attenuation corrected by semi-empirical dose buildup factors applied individually to a similar number of gamma ray energies. Availability of several bremsstrahlung source options permit comparison of most commonly used approximations. Energy dependent removal cross sections are used to calculate secondary neutron transmission. (Author)

Descriptors :   (*SPACECRAFT, NUCLEAR RADIATION), (*NUCLEAR RADIATION, SHIELDING), (*CHARGED PARTICLES, SHIELDING), COMPUTER PROGRAMMING, NUCLEAR CROSS SECTIONS, BREMSSTRAHLUNG, PROTON REACTIONS, ELECTRONS, DOSE RATE

Subject Categories : Nuclear Radiation Shield, Protection & Safety
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE