Direct Scanning Densitometry: An Effect of Sample Heterogeneity and Aperture Area

William W. Moschler, Jr., Paul M. Winistorfer


Direct scanning radiation densitometry is finding increased application in forestry and wood products research. Radiation densitometry is often used for tree ring analysis and density profile analysis of reconstituted panel products. This paper discusses some limitations to accuracy in the use of a scanning or stepping densitometry system. The effect of aperture area and sample heterogeneity on accuracy of the density determination is discussed. The "edge effect" in the densitometry of panel products is discussed.


Gamma densitometry;densitometry;density

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