EXPANSION OF FALLOUT-RADIATION NUMBER-SPECTRA CALCULATIONS TO LOW ALTITUDE

Abstract

Gamma-ray number and dose-rate spectra in the air above a smooth, quasi-infinite ground uniformly covered with fallout fission products are calculated. The spectra are calculated for 11 decay times, from 1.12 hours to 97.3 days, and at 7 altitudes, from 3 ft to 200 ft. The spectra are analyzed for the effects of altitude and decay time on spectral shape, with trends illustrated by computer tabulations and selected graphs. Results show that the spectra soften with increasing altitude and that they soften with decay time for about 2 days, become slightly harder for about 3 weeks, then resume softening. Reduction of total dose rate with altitude is nearly independent of decay time (below 400 feet). A related study, to determine the effects of ground roughness, is recommended. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1966
Accession Number
AD0634534

Entities

People

  • O. L. Mcdermed
  • T. W. Devries

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Masses
  • Altitude
  • Blood Coagulation Factors
  • Civil Defense
  • Computers
  • Contracts
  • Data Analysis
  • Detectors
  • Fission Products
  • Gamma Rays
  • Geometry
  • Low Altitude
  • Mathematical Models
  • Radiation
  • Research Facilities
  • Spectra

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Nuclear and Radiation Engineering.
  • Polymer Science and Engineering.