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Energy Absorption in Cylinders Containing an Axial Source^1,2

Dearborn, Michigan

ABSTRACT

The absorbed photon energy is the total energy associated with the emitted photons times the absorption fraction. For a cylinder containing a radioactive isotope uniformly distributed along its axis, the absorption fraction is derived analytically assuming only that the linear absorption coefficient is constant throughout the cylinder. Values of the absorption fraction are tabulated as a function of the linear absorption coefficient and cylinder dimensions.

FOOTNOTES

¹ Supported by American Cancer Society Institutional Grant #40, Wayne State University School of Medicine, and grant RI-1-62, Dearborn Veterans Administration Hospital.

² From the Radioisotope Service, Veterans Administration Hospital, Dearborn, Michigan.

³ Chief, Radioisotope Service, Veterans Administration Hospital, Dearborn, Michigan, and Associate Professor of Pathology, Wayne State University School of Medicine, Detroit, Michigan.