Monoenergetic Time-Dependent Neutron Transport from an Expanding Shell Source in the Atmosphere.

Abstract

The one group time-dependent transport equation for neutrons in sea level atmosphere is solved numerically for an expanding shell source. Using spherical geometry and assuming azimuthal symmetry and isotropic scatter, the problem is formulated in terms of the x,y,t variables. Results have been calculated for a region of eight mean free paths in diameter yielding flux curves comparable to S sub n. The problem was programmed for the IBM-7094 computer using the Fortran IV language. The program includes a plotting routine for an off-line plotter. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1969
Accession Number
AD0857324

Entities

People

  • James Walter Fisk

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Atmospheres
  • Boltzmann Equation
  • Computers
  • Diameters
  • Equations
  • Geometry
  • Language
  • Mathematics
  • Mean Free Path
  • Plotters
  • Plotting
  • Sea Level
  • Symmetry
  • Transport Ships

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Computer Science.
  • Solar Physics