The spectral shape of forbidden beta-decays is a crucial benchmark for nuclear physics calculations and has important implications also for astroparticle physics. Among the interesting isotopes in this field, 115In is an excellent candidate, being a primordial nuclide featuring a good compromise among Q-value (497.489(10) keV) and half-life (4.41×1014 yr). In this paper, we propose to exploit a cryogenic calorimeter based on a In2O3 crystal to perform a high-precision measurement of the β-decay energy spectrum, discussing also the results obtained within a preliminary test of this crystal and the next steps to improve the detector performance.
Celi, E., Galazka, Z., Laubenstein, M., Nagorny, S., Pagnanini, L., Pirro, S., et al. (2022). Development of a cryogenic In2O3 calorimeter to measure the spectral shape of 115In β-decay. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 1033 [10.1016/j.nima.2022.166682].
Development of a cryogenic In2O3 calorimeter to measure the spectral shape of 115In β-decay
Pagnanini L.;Puiu A.
2022
Abstract
The spectral shape of forbidden beta-decays is a crucial benchmark for nuclear physics calculations and has important implications also for astroparticle physics. Among the interesting isotopes in this field, 115In is an excellent candidate, being a primordial nuclide featuring a good compromise among Q-value (497.489(10) keV) and half-life (4.41×1014 yr). In this paper, we propose to exploit a cryogenic calorimeter based on a In2O3 crystal to perform a high-precision measurement of the β-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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