Journal
EUROPEAN PHYSICAL JOURNAL PLUS
Volume 138, Issue 5, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1140/epjp/s13360-023-03946-x
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The ACCESS project aims to establish a novel technique for precision measurements of forbidden beta-decays. It will operate a pilot array of cryogenic calorimeters to simultaneously measure natural and synthetic isotopes with a common experimental technique. The project also includes optimized crystals to reduce systematic uncertainty.
The ACCESS (Array of Cryogenic Calorimeters to Evaluate Spectral Shapes) project aims to establish a novel technique to perform precision measurements of forbidden beta-decays, which can serve as an important benchmark for nuclear physics calculations and represent a significant background in astroparticle physics experiments. ACCESS will operate a pilot array of cryogenic calorimeters based on natural and doped crystals containing beta-emitting radionuclides. In this way, natural (e.g. Cd-113 and In-115) and synthetic isotopes (e.g. Tc-99) will be simultaneously measured with a common experimental technique. The array will also include further crystals optimised to disentangle the different background sources, thus reducing the systematic uncertainty. In this paper, we give an overview of the ACCESS research program, discussing a detector design study and promising results of In-115.
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