Abstract
ABSTRACT We present further developments of our technique for high sensitivity high resolution α-particle autoradiography of human lung tissue using CR-39 plastic. High resolution measurements of α-track length and dip angle on the auto radiograph are made. The distributions of these quantities allow the distribution of α-active elements present to be calculated. Any localisation of height emission up to 30 μm above the plastic surface can also be found. Using a distribution of distance to nearest neighbour of α-tracks on the autoradiograph the Radon diffusion coefficient is measured. This information is necessary in order to calculate the thickness of tissue sampled for Rn222 and daughter nuclei.
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