SPECTRA OF THE INTERNALLY SCATTERED RADIATION FROM LARGE CO 60 SOURCES USED IN TELETHERAPY,

Abstract

Because of internal scattering and degradation of the 1.33 and 1.17 MeV quanta, the beam of radiation from a Co60 teletherapy unit includes a continuous spectrum extending well below 1 MeV. The form of this spectrum below l MeV and its intensity relative to the radiation above 1 MeV have been investigated for sources of various dimensions. The influence of the material around the source, the relative spectral contributions of different parts of the source, and the spectra from bare sources outside the teletherapy head have also been studied. Methods of designing source and head to minimize the radiation below 1 MeV may be inferred from the graphs. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 09, 1964
Accession Number
AD0611645

Entities

People

  • J. H. Aitken
  • W. H. Henry

Organizations

  • National Research Council Canada

Tags

DTIC Thesaurus Topics

  • Continuous Spectra
  • Degradation
  • Diffraction
  • Electromagnetic Radiation
  • Intensity
  • Radiation
  • Scattering
  • Spectra

Fields of Study

  • Physics

Readers

  • Seismology
  • Semiconductor Device Technology
  • Structural Dynamics.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference