Accession Number : AD0779942

Title :   Barnyard III: A Moments Code for Neutron Cross Section Collapsing with the CDC 6600 Computer.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Husemann,Richard C.

Report Date : MAR 1974

Pagination or Media Count : 142

Abstract : Barnyard 3, a multigroup neutron cross section computer code, was developed to satisfy a need in the Air Force Institute of Technology Graduate Nuclear Effects program for neutron cross sections for nuclear weapons problems. A 99 fine group energy structure covering the energy spectrum from 14.918 Mev to .4139 ev can be collapsed to 22 or fewer broad groups. The absorption, fission, removal, transport and total cross sections are calculated for each broad group as are the average cosine of the scattering angle and group to group scatter transfer cross sections. The zero moment calculated by the code or a user provided flux is used to flux weight these cross sections. (Modified author abstract)

Descriptors :   *Neutron cross sections, *Nuclear weapons, *Weapons effects, *Computer programs, Neutron flux, Computer programming, Tables(Data), Theses, FORTRAN

Subject Categories : Computer Programming and Software
      Nuclear Weapons
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE