Current status and perspectives of the ACCESS project

Résumé fourni par la source

The ACCESS project (Array of Cryogenic Calorimeters to Evaluate Spectral Shapes) aims to establish a novel technique to perform precision measurements of forbidden beta-decays, whose spectral shape is a crucial benchmark for Nuclear Physics calculations and plays a pivotal role in Astroparticle Physics experiments. ACCESS will operate a pilot array of four tellurium dioxide crystals as cryogenic calorimeters at 10 mK. Three of them will be doped with different beta emitters (99Tc, 151Sm, 210Pb/210Bi), while the last natural one will be used for effective background subtraction. In the intermediate steps of the project also natural crystals such as cadmium tungstate (CdWO4) and indium dioxide (In2O3) will be used to investigate the beta decay of 113Cd and 115In respectively. In this work, we will describe the ACCESS project, summarizing the current status and future perspectives. Moreover, we will discuss the preliminary results obtained with indium-based crystals operated as cryogenic calorimeters.

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