Specimen Orientation for the Calibration of Direct Scanning X-Ray Wood Densitometers

Authors

  • Ning Guan
  • Yang-Jun Wang
  • Hongmei Gu

Keywords:

X-ray, densitometer, calibration

Abstract

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

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Published

2007-06-05

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Section

Research Contributions