Speaker
Description
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 ($^{99}$Tc, $^{115}$Sm, $^{210}$Pb/$^{210}$Bi), 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 (CdWO${4}$) and indium dioxide (In${2}$O$_{3}$) will be used to investigate the beta decay of $^{113}$Cd and $^{115}$In respectively. In this contribution, we will describe the ACCESS project, summarizing the current status and the future perspectives. Moreover, we will discuss the preliminary results obtained with indium-based crystals.
