X-ray Scanning Machine for Tree-Ring Width and Density Analyses

M. L. Parker, L. A. Jozsa


High-quality radiographs of wood samples can be produced for intra-ring specific gravity studies using an X-ray scanning machine. A hydraulic system is used to provide constant-speed and vibration-free motion for scanning tree-ring samples up to 4 feet [1.22 m] long. Stationary exposures can be made from distances of up to 7 feet [2.13 m]. Wood-sample preparation and X-ray film-processing techniques are described.


in-motion radiography;X-ray densitometry;specific gravity;dendrochronology;wood density;annual growth increments

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