Energy Spectra of Electrons Emerging from Lead Exposed to 320kVp White X-rays

概要

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The energy spectra of secondary electrons, which emerge perpendicularly from a lead-foil exposed to 320 kVp therapeutic white x-rays (HVL=3 mmCu), are observed by a double-focusing magnetic beta-spectrometer. For the foil thicknesses 0.4-34 mg/cm^2 and the x-ray incident angles less than 80°, the emerging electrons are found in the energy region less than 220keV with the maximum counts at 50-80keV (mean energy: 75-100 keV). For a given foil thickness, the spectral shape is almost independent of the incident angle of x-rays. With the increase in foil thicknesses, however, the high-energy part of the spectra is markedly intensified.
社団法人応用物理学会の論文
1963-02-15