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arXiv · 2110.03934

Development of cryogenic calorimeters to measure the spectral shape of In-115 beta decay

E. Celi·Z. Galazka·M. Laubenstein·S. Nagorny·L. Pagnanini·S. Pirro·A. Puiu
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Abstract

The spectral shape of forbidden beta-decays is a crucial benchmark for nuclear physics calculations and has important implications also for astroparticle physics experiments. Among the interesting isotopes in this field, $^{115}$In is an excellent candidate, being a primordial nuclide featuring a good compromise among Q-value (497.954 keV) and half-life (4.41$\times$10$^{14}$ yr). In this paper, we propose to exploit a cryogenic calorimeter based on In$_2$O$_3$ crystal to perform a high-precision measurement of the $\beta$-decay energy spectrum, discussing also the results obtained within a preliminary test of this crystal and the next steps to improve the detector performance.

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E. Celi, Z. Galazka, M. Laubenstein, S. Nagorny, L. Pagnanini, S. Pirro, A. Puiu. 2021-10-08. Development of cryogenic calorimeters to measure the spectral shape of In-115 beta decay. https://doi.org/10.1016/j.nima.2022.166682

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