ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Tracking muons to their final states in model systems
Abstract: We recently studied KF to investigate muon sites and diffusion pathways, owing to its simple structure and low cation nuclear moment. However, the data showed a very small asymmetry and strange relaxation that we were unable to explain. This result prompted us to consider muon behaviour more widely in the alkali halides, with previous studies suggesting a delayed diamagnetic state is formed through a prompt paramagnetic species. This early work proposed that state conversion is mediated by defect states. One of the crucial assumptions in ?SR is that any defects that may be caused by the implantation of the muon are sufficiently far away that they do not affect the final muon spectra, but if the hypothesis from this early work is found to be correct then this could have profound implications for ?SR. As alkali fluorides weren?t part of this early study and their measurements on the halides were carried out over a comparatively restricted temperature range, we believe that it?s opportune to take a fresh look at these materials. As well as at-resonance RF measurements to determine state conversion rates, we plan to use a combination of 90º pulsed RF methods and DFT to characterise the final states. The original study will be extended to encompass the alkali fluorides, where the F? ion so often plays a role in significantly modifying the muonic properties of these materials.
Principal Investigator: Dr John Wilkinson
Local Contact: Dr Stephen Cottrell
Experimenter: Dr Peter Baker
DOI: 10.5286/ISIS.E.RB2510704
ISIS Experiment Number: RB2510704
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2510704-1 | EMU | 23 May 2028 | Download |
| 10.5286/ISIS.E.RB2510704-2 | EMU | 29 May 2028 | Download |
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
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Data Citation
The recommended format for citing this dataset in a research
publication is as:
[author], [date], [title], [publisher],
[doi]
For Example:
Dr John Wilkinson et al; (2025): Tracking muons to their final states in model systems, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2510704
Data is released under the CC-BY-4.0 license.
