Violation of y-scaling in D2 ¿ Test of existing theories

DOI

The applicants aim to perform the most authoritative measurements of NCS profiles by controlling and precisely quantifying everything to do with the sample. In July 2008 we studied the NCS profile from free H2 gas at p=50 bar and T=295 K. In contrast to previous results and theoretical expectations, our very careful measurement on H2 revealed that the breadth of the H peak in J(y) exhibits a strong decrease with increasing momentum transfer, i.e. ¿violation of y-scaling¿. This effect is clearly visible to the eye in the as-measured NCS profiles. We repeated the experiment in July 2009, at 44 K and 295 K, and confirmed our previous results. Because the violation of y-scaling was unexpected and is unexplained, there is a need for as much knowledge as possible about the phenomenon. For this reason, this proposal requests beam time to study D2. Novel theoretical insights are also expected.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24079376
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24079376
Provenance
Creator Dr Jerry Mayers; Professor Aris Dreismann; Professor Evan Gray
Publisher ISIS Neutron and Muon Source
Publication Year 2013
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2010-07-10T08:00:10Z
Temporal Coverage End 2010-07-27T05:24:53Z