Exploiting and developing time integral and differential Radio-Frequency methods - An RF- μ SR study of the 2-Norbornyl radical in Norbornene

Cottrell, S.P. and Giblin, S.R. ORCID: https://orcid.org/0000-0003-1876-8619 2026. Exploiting and developing time integral and differential Radio-Frequency methods - An RF- μ SR study of the 2-Norbornyl radical in Norbornene. Journal of Physics: Conference Series 3222 (1) , 012006. 10.1088/1742-6596/3222/1/012006

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Abstract

Compared to spin rotation techniques, Radio-Frequency (RF) muon spin resonance has the unique advantage of enabling hyperfine parameters of muoniated radicals to be characterised even for slowly formed radical species. However, measurement times can be long because of the need to scan field or frequency to obtain a complete spectrum, a problem compounded if the hyperfine parameters for the system are poorly determined. Significant efficiency gains should be possible if short, intense RF pulses are applied to simultaneously excite all frequencies across a broad spectrum. RF pulses can be timed to rotate the muon spins through 90°, with a Fourier transform of the subsequent free precession signal revealing spectral information. In this contribution, we investigate the feasibility of this approach for the measurement of muoniated radicals through a study of the 2-Norbornyl radical formed in polycrystalline Norbornene. The efficacy of the RF techniques is considered through a comparison of results with previous spin rotation and avoided level crossing studies.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Type: cc-by
Publisher:	IOP Publishing
ISSN:	1742-6588
Date of First Compliant Deposit:	2 June 2026
Last Modified:	02 Jun 2026 10:45
URI:	https://orca.cardiff.ac.uk/id/eprint/187359

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