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5 results for “neutron powder diffraction”
1.3A (Ge337) calibration data for new Ge115 monochromator installed on Echidna Neutron Powder Diffraction Instrument
<p>In early October 2024 the Echidna neutron powder instrument located at the OPAL reactor, ANSTO, installed a new monochromator with Ge115 cut. The present calibration data were collected shortly afterwards from a standard LaB6 sample in a 6mm diameter Vanadium can. The instrument was set to 140 degrees takeoff angle and monochromator angle 85.08 degrees, corresponding to the Ge337 reflection. Raw data in NeXus format are contained in <strong>ECH0034261.nx.hdf</strong>. These data were corrected for variable detector response using the information in <strong>eff_2024-10-06.cif</strong> and pixel vertical positions adjusted according to the table in <strong>vertical_offsets_2024-10-06.txt. </strong>Deviations from the ideal detector 1.25 degree angular spacing were applied using <strong>echidna-Apr2018.ang</strong>. The detector response was then recorrected based on overlapping measurements using the algorithm described in <a href="https://doi.org/10.1107/S1600576718014048">Avdeev and Hester (2018)</a> resulting in a 1D pattern suitable for fitting wavelength and peak shapes. This 1D pattern is provided here as a plain table (<strong>ECH0034261_LaB6.xyd</strong>) and as a pdCIF file (<strong>ECH0034261_LaB6.cif</strong>) including metadata on data collection and reduction. Details of data reduction are described in the above paper, and the data reduction routines used are included in the <a href="https://github.com/Gumtree/Echidna_scripts">Gumtree package as python code</a>.</p>
Neutron powder diffraction data from solid nitrogen in the range 6K-70K
<p>Neutron powder diffraction patterns from nitrogen solidified in-situ. This data accompanies a submitted paper.</p>
Neutron powder diffraction from NIST 660c LaB6 standard for calibration of Wombat high-intensity neutron powder diffractometer
<p>Calibration data for the Wombat high intensity powder diffractometer, ANSTO, collected at a nominal wavelength of 1.64A from NIST 660c LaB<sub>6</sub> standard using the [224] reflection from a single crystal Ge monochromator, [335] cut. Note that B in this standard is enriched to 99% with isotope <sup>11</sup>B. The sample was loaded in a 6mm diameter vanadium cylindrical sample can.</p>
Neutron powder diffraction data of solid methane in the range 8K-90K
<p>Raw and processed neutron powder diffraction data from solid methane in the range 8K-90K in 2K steps. Data were collected on the Wombat high-intensity powder neutron diffractometer. This data accompanies a submitted publication.</p>
Neutron powder diffraction data from nitrogen in the range 16K-72K
<p>Neutron powder diffraction data from nitrogen solidified in situ and measured from 16K up to 72K. Data were measured on the Wombat high intensity neutron powder diffractometer at ANSTO, Australia.</p>
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