论文信息 - ESTIMATION OF THE MATRIX ATTENUATION IN HETEROGENEOUS RADIOACTIVE WASTE DRUMS USING DUAL-ENERGY COMPUTED TOMOGRAPHY

ESTIMATION OF THE MATRIX ATTENUATION IN HETEROGENEOUS RADIOACTIVE WASTE DRUMS USING DUAL-ENERGY COMPUTED TOMOGRAPHY

Abstract Gamma spectroscopy measurements of the activity of radionuclides in nuclear waste drums must be corrected for the attenuation due to the non-homogeneous waste matrix. The attenuation factors depend on the matrix local density and effective atomic number, and on the energy of the gamma rays emitted by the radionuclides. The requirements for the system presented in this paper are to estimate the attenuation in low-density (

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