Specimen Orientation for the Calibration of Direct Scanning X-Ray Wood Densitometers
Keywords:
X-ray, densitometer, calibrationAbstract
It was found that specimen orientation has considerable effect on the calibration of direct scanning X-ray wood densitometers. A comparison between various orientations was made and verified by a test. Optimum calibration is accomplished when the specimens are made in such a way that the radiation beam is passed through the wood in the tangential direction and scans it in the radial direction.References
Choi, A. S. C. 1987. Correlation between mechanical strength of wood and ring characteristics in Douglas-fir juvenile and mature wood. Master's thesis, Oregon State University, Corvallis, OR.nCown, D. J., and B. C. Clement. 1983. A wood densitometer using direct scanning with X-rays. Wood Sci. Technol.17:91-99.nGuan, N., J. S. Qu, and Y. J. Wang. 1995. The X-ray wood densitometer typed MWMY. China Wood Industry9(1):19-23.nHoag, M., and M. D. McKimmy. 1988. Direct scanning X-ray densitometry of thin wood section. Forest Prod. J.38(1):23-26.nLaufenberg, T. L. 1986. Using gamma radiation to measure density gradients in reconstituted wood products. Forest Prod. J.36(2):59-62.nLiang, J. S., and N. Guan. 1990. A study of wood densitometry with various radiation sources. China Wood Industry4(4):33-37.nMalan, F. S., and P. C. Marais. 1992. Some notes on the direct gamma ray densitometry of wood. Holzforschung46:91-97.nMoschler, W. W., Jr., and E. F. Dougal. 1988. Calibration procedure for a direct scanning densitometer using gamma radiation. Wood Fiber Sci.20(3):297-303.nMoschler, W. W., Jr., and P. M. Winistorfer. 1990. Direct scanning densitometry: An effect of sample heterogeneity and aperture area. Wood Fiber Sci.22(1):31-38.n
Downloads
Published
Issue
Section
License
The copyright of an article published in Wood and Fiber Science is transferred to the Society of Wood Science and Technology (for U. S. Government employees: to the extent transferable), effective if and when the article is accepted for publication. This transfer grants the Society of Wood Science and Technology permission to republish all or any part of the article in any form, e.g., reprints for sale, microfiche, proceedings, etc. However, the authors reserve the following as set forth in the Copyright Law:
1. All proprietary rights other than copyright, such as patent rights.
2. The right to grant or refuse permission to third parties to republish all or part of the article or translations thereof. In the case of whole articles, such third parties must obtain Society of Wood Science and Technology written permission as well. However, the Society may grant rights with respect to Journal issues as a whole.
3. The right to use all or part of this article in future works of their own, such as lectures, press releases, reviews, text books, or reprint books.