The open archive for STFC research publications

Full Record Details

Persistent URL http://purl.org/net/epubs/work/24218966
Record Status Checked
Record Id 24218966
Title Initial results from the High Resolution Powder Diffractometer HRPD at ISIS
Abstract This paper reviews the initial commissioning of the high resolution tirne-offliyht neutron powder diffractometer, HRPD, on the Spallation Neutron Source, ISIS, at the Rutherford Appleton Laboratory. Preliminary results have confirmed both intensity and resolution predictions indicating that (td/d) lies between 0.04% and 0.08% for an d-spacings between 0.2 and 5A. The scientific potential of this increased resolution over existing tirne-of-fliyht diffractometers has been demonstrated in the successful ab initio structure determination of an unknown inorganic material, FeAs04, and the detailed study of subtle symmetry changes in NiO. The true instrumental resolution, however, has been observed in only a small number of experiments: sample broadening is often seen to play a dominant role in the determination of the peak shape, particularly at longer d-spacings. This leads to additional useful information about macroscopic properties, such as anisotropic crystallite size, strain distribution and sample homogeneity, but also results in a significant increase in complexity of peak-shape description and data-analysis strategy.
Organisation ISIS , ISIS-HRPD , SERC
Funding Information
Related Research Object(s):
Licence Information:
Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-86-068. 1986. RAL 86_068.pdf 1986