Latest results of NEMO-3: New limit on the 0νββ decay half-life for 100Mo

Topical Research Meeting: Prospects in Neutrino Physics

Blot, S.^1 ; Mott, J.^2 ; Vilela, C.^2

University of Manchester, Oxford Rd, Manchester

M13 9PL, United Kingdom^1

University College London, Gower St, London

WC1E 6BT, United Kingdom^2

关键词: Active detector;    Background suppression;    Half life measurements;    Half lives;    Lepton number;    Majorana particles;    Neutrinoless double-beta decays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/598/1/012015/pdf
DOI  :  10.1088/1742-6596/598/1/012015

来源: IOP

【 摘 要 】

The NEMO-3 experiment is an experiment dedicated to the search for neutrinoless double β decay (0νββ). Detection of 0νββ decay would be direct evidence that neutrinos are Majorana particles and lepton number is violated. In NEMO-3, the separation of source isotopes from the active detector region allows for reconstruction of the full event topology, which AIDS in background suppression and the investigation of 0νββ decay underlying mechanisms. NEMO-3 has investigated a total of seven isotopes,100Mo,82Se,116Cd,150Nd,48Ca,96Zr, and130Te, and has produced the world's best 2νββ decay half-life measurements for all of them. No indication of 0νββ decay has yet been observed. Presented here is the newly published limit of T0νββ1/2> 1.1 × 1024y (90% C.L.) for 37 kg•y exposure of100Mo.