Accurate neutron scattering lengths of Sm- and Nd-isotopes
The bound coherent neutron scattering length, bcoh(j), is a basic property of an isotope j. Accurate bcoh(j) values are needed in many areas of neutron science. e. g. condensed matter research and nuclear physics. Tabulated scattering lengths have sometimes low accuracy/precision (> 5% error) and / or rely on a single measurement only. The scope of this proposal is to make use of neutron powder diffraction in order to get both precise and accurate neutron scattering lengths values for some isotopes of samarium (147Sm, 148Sm, 152Sm and 154Sm) and for the seven natural occurring isotopes of neodymium. Both elements are part of many functional materials. The advantage of Bragg diffraction is that determination relies on relative reflection intensities without the need to normalize to an absolute scale. The packing density of samples, exact dimensions or weight; important parameters for other techniques of bcoh(j) determination - do not play any role either. To exclude systematic errors in the diffraction data used for Rietveld refinements on one hand and check wavelength dependency on the other hand, each sample will be measured on two different instruments.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
GEHLHAAR Florian; Henry E. Fischer; Thomas C. Hansen and Holger Kohlmann. (2021). Accurate neutron scattering lengths of Sm- and Nd-isotopes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-10-50
This data is not yet public
This data is not yet public
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.