Article Dans Une Revue Journal of Instrumentation Année : 2024

First measurements with a new $\beta$-electron detector for spectral shape studies

Résumé

The shape of the spectrum corresponding to the electrons emitted in $\beta$ decay carries a wealth of information about nuclear structure and fundamental physics. In spite of that, few dedicated measurements have been made of $\beta$-spectrum shapes. In this work we present a newly developed detector for $\beta$ electrons based on a telescope concept. A thick plastic scintillator is employed in coincidence with a thin silicon detector. First measurements employing this detector have been carried out with mono-energetic electrons from the high-energy resolution electron-beam spectrometer at Bordeaux. Here we report on the good reproduction of the experimental spectra of mono-energetic electrons using Monte Carlo simulations. This is a crucial step for future experiments, where a detailed Monte Carlo characterization of the detector is needed to determine the shape of the $\beta$-electron spectra by deconvolution of the measured spectra with the response function of the detector. A chamber to contain two telescope assemblies has been designed for future $\beta$-decay experiments at the Ion Guide Isotope Separator On-Line facility in Jyväskylä, aimed at improving our understanding of reactor antineutrino spectra.

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Dates et versions

hal-04122094 , version 1 (03-06-2025)

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Victor Guadilla, A Algora, Magali Estienne, Muriel Fallot, W Gelletly, et al.. First measurements with a new $\beta$-electron detector for spectral shape studies. Journal of Instrumentation, 2024, 19 (02), pp.P02027. ⟨10.1088/1748-0221/19/02/P02027⟩. ⟨hal-04122094⟩
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