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arXiv · 2503.08891

Advanced muon-spin spectroscopy with high lateral resolution using Si-pixel detectors

Lukas Mandok·Pascal Isenring·Heiko Augustin·Marius Köppel·Jonas A. Krieger·Hubertus Luetkens·Thomas Prokscha·Thomas Rudzki·André Schöning·Zaher Salman
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Abstract

Muon-spin spectroscopy at continuous sources has stagnated at a stopped muons rate of ~40 kHz for the last few decades. The major limiting factor is the requirement of a single muon in the sample during the typical 10 {\mu}s data gate window. To overcome this limit and to be able to perform muon-spin relaxation ({\mu}SR) measurements on millimeter-sized samples, one can use vertex reconstruction methods to construct {\mu}SR spectra. This is now possible thanks to the availability of very thin monolithic Si-pixel chips, which offer minimal particle scattering and high count rate. Here we present results from a Si-pixel based spectrometer that utilizes vertex reconstruction schemes for the incoming muons and emitted positrons. With this spectrometer we were able to obtain a first vertex reconstructed {\mu}SR (VR-{\mu}SR) spectrum. The unique capabilities and benefits of such a spectrometer are discussed.

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Lukas Mandok, Pascal Isenring, Heiko Augustin, Marius Köppel, Jonas A. Krieger, Hubertus Luetkens, Thomas Prokscha, Thomas Rudzki, André Schöning, Zaher Salman. 2025-03-11. Advanced muon-spin spectroscopy with high lateral resolution using Si-pixel detectors. https://doi.org/10.1103/f4jb-39yn

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