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. 2012 Feb 2;117:61–79. doi: 10.6028/jres.117.002

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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

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Fig. 15 — (top) Elastic incoherent scattering onto the PSD, with only three blades of the analyzer set for reflection at 14.7 meV, to demonstrate this mode of the analyzer. (bottom) Measured inelastic magnetic scattering for superconducting (Ba-K)Fe₂As₂ [17] at an energy transfer of 4 meV, for a single setting of the spectrometer. The approximate Q range for the constant-E mode is shown on the x axis, where a nice inelastic magnetic peak is observed centered at H=0.50. The upturn in scattering at smaller H is a background problem due to inadequate shielding.