Backscattering and transmission through a high z interface as a measure of electron beam energy

Indra J. Das, Harry S. Bushe

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The ratio of electron beam transmission (Tr) and backscattering (Bs) is used as a measure of beam energy. With a proper thickness of high Z medium placed at the surface of a low Z homogeneous medium, it is observed that the function log(Tr/Bs) is a linear function of electron energy. This method is applied to electrons produced with scattering foil and pulse-swept (scanned) beams for the nominal energies ranging from 6 to 20 MeV. This technique provides a unique alternative method which is easy, simple, and accurate within ±3% for estimation of electron beam energy.

Original languageEnglish (US)
Pages (from-to)315-319
Number of pages5
JournalMedical Physics
Volume21
Issue number2
DOIs
StatePublished - Feb 1994

Keywords

  • backscatter
  • beam energy
  • electron beam
  • interface dosimetry
  • quality assurance
  • transmission

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

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