GAMMA EXPOSURE RATES FROM A VARIETY OF AMBIENT OR NONAMBIENT CYLINDRICAL FISSION - PRODUCT SOURCES: A MODEL FOR THEIR CALCULATION.

Abstract

A mathematical model is developed for the calculation of free-field gamma exposure rates from a variety of U235-mixed-fission-product sources. The source geometries considered include ambient or non-ambient cylindrical or annular sources, and an ambient cylindrical source encased in a non-ambient topped annulus. In the integration procedures, the self-attenuation of the sources is considered and time-dependent effective attenuation coefficients are employed to characterize the attenuation and absorption of the spectra of gamma photons emitted from the fission product radionuclides. The model is formulated in a manner suitable for numerical evaluation. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 07, 1968
Accession Number
AD0678727

Entities

People

  • Frank H. Young

Organizations

  • Naval Radiological Defense Laboratory

Tags

DTIC Thesaurus Topics

  • Absorption
  • Attenuation
  • Coefficients
  • Fission Products
  • Free Field
  • Geometry
  • Mathematical Models
  • Models
  • Spectra
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Nuclear and Radiation Engineering.
  • Structural Dynamics.