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XRD Acquisition Parameters for Detection of Weak Peaks

  • P. W. Seabaugh (a1), D. B. Sullenger (a1), C. R. Hudgens (a1), M, C. Nichols (a2) and D. R. Boehme (a2)...

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The use of high-intensity, 8Kw, x-ray sources (Rigaku rotating-anode generator and wide - angle goniometer for this study) provides both opportunities and challenges. With high - intensity x-ray sources, detection limits can be lowered significantly while still offering count times of practical duration. On the other hand, the availability of high intensity x-ray sources puts greater demands on information extraction procedures and on the mechanical preciseness of sample containment and support. In particular we addressed the use of a cylindrical aluminum sample cell with a 0.010’’ polycrystalline (cold rolled) beryllium window electron –beam welded to an aluminum frame. See Figure 1. This cell permitted analysis of various air-sensitive specimens. The sample was pressed against the back of the beryllium window by a spring-loaded backing plate.

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1. Howard, S. A., SHADOW:. A. System for X-Ray-Diffraction Pattern Analysis (1988), Adv. in X-Ray Anal., 32; 523530 (1989)
2. Howard, S. A., Snyder, R. L.. An Evaluation of Some Profile Models and the Optimisation Procedures Used in Profile Filling, Adv. in X-ray Anal., 26; 7381 (1983).
3. Howard, S. A., Incorporating W*G Deconvolution in X-ray Rietveid Structure Refinement, Ph.D. Thesis. New York State College of Ceramics (1984).

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