The NEXT double beta decay experiment

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Laing, A.^1

Instituto de Física Corpuscular (IFIC), CSIC and Universitat de València, Calle Catedrático José Beltrán 2, Paterna, Valencia

46980, Spain^1

关键词: Background suppression;    Double beta decay;    Energy resolutions;    Majorana neutrino mass;    Neutrino experiments;    Neutrinoless double-beta decays;    Time projection chambers;    Track reconstruction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062033/pdf
DOI  :  10.1088/1742-6596/718/6/062033

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

NEXT (Neutrino Experiment with a Xenon TPC) is a neutrinoless double-beta (ββ0v) decay experiment at Laboratorio Subterraneo de Canfranc (LSC). It is an electroluminescent Time Projection Chamber filled with high pressure136Xe gas with separated function capabilities for calorimetry and tracking. Energy resolution and background suppression are the two key features of any neutrinoless double beta decay experiment. NEXT has both good energy resolution (-4counts keV-1kg-1yr-1, and a sensitivity to the Majorana neutrino mass of between 80-160 meV (depending on NME) after a run of 3 effective years of the 100 kg scale NEXT-100 detector. The initial phase of NEXT-100, called NEW, is currently being commissioned at LSC. It will validate the NEXT background rate expectations and will make first measurements of the two neutrino ββ2v mode of136Xe. Furthermore, the NEXT technique can be extrapolated to the tonne scale, thus allowing the full exploration of the inverted hierarchy of neutrino masses. These proceedings review NEXT R&D results, the status of detector commissioning at LSC and the NEXT physics case.