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High q-resolution neutron scattering technique using triple-axis spectrometers

Guangyong Xu·P. M. Gehring·V. J. Ghosh·G. Shirane
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Abstract

We present a new technique which brings a substantial increase of the wave-vector $q$-resolution of triple-axis-spectrometers by matching the measurement wave-vector $q$ to the reflection $τ_a$ of a perfect crystal analyzer. A relative Bragg width of $δ/Q \sim 10^{-4}$ can be achieved with reasonable collimation settings. This technique is very useful in measuring small structural changes and line broadenings that can not be accurately measured with conventional set-ups, while still keeping all the strengths of a triple-axis-spectrometer.

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Guangyong Xu, P. M. Gehring, V. J. Ghosh, G. Shirane. 2004-01-22. High q-resolution neutron scattering technique using triple-axis spectrometers. https://arxiv.org/abs/cond-mat/0401439

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