EPJ Web Conf.
Volume 194, 2018International Conference on Nuclear Structure and Related Topics (NSRT18)
|Number of page(s)||4|
|Section||Spin-isospin excitations and beta-decay|
|Published online||14 November 2018|
The nuclear matrix elements of 0νββ decay and the NUMEN project at INFN-LNS
INFN-Laboratori Nazionali del Sud, Catania, Italy
2 Università degli Studi di Catania, Catania, Italy
3 Universidad Nacional Autònoma de México, Ciudad de México, Mexico
4 INFN-Sezione di Catania, Catania, Italy
5 Akdeniz University, Antalya, Turkey
6 INFN-Sezione di Torino, Turin, Italy
7 LPC Caen, Normandie Université, ENSICAEN, UNICAEN, CNRS/IN2P3, Caen, France
8 Istitute of Natural Science, Karadeniz Teknik Universitesi, Trabzon, Turkey
9 DISAT, Politecnico di Torino, Turin, Italy
10 Università di Enna “Kore”, Enna, Italy
11 Universidade Federal Fluminense, Niteroi, Brazil
12 Universidade de Sao Paulo, Sao Paulo, Brazil
13 University of Ioannina, Ioannina, Greece
14 Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens, Greece
* e-mail: email@example.com
Published online: 14 November 2018
The goal of NUMEN project is to access experimentally driven information on Nuclear Matrix Elements (NME) involved in the neutrinoless double beta decay (0νββ), by high-accuracy measurements of the cross sections of Heavy Ion (HI) induced Double Charge Exchange (DCE) reactions. The knowledge of the nuclear matrix elements is crucial to infer the neutrino average masses from the possible measurement of the half-life of 00νββ decay and to compare experiments on different isotopes. In particular, the (18O, 18Ne) and (20Ne, 20O) reactions are performed as tools for β+β+ and β-β- decays, respectively. The experiments are performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania using the Superconducting Cyclotron (CS) to accelerate the beams and the MAGNEX magnetic spectrometer to detect the reaction products. The measured cross sections are very low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. In order to make feasible a systematic study of all the candidate nuclei, a major upgrade of the LNS facility is foreseen to increase the experimental yield of about two orders of magnitude. To this purpose, frontier technologies are going to be developed for both the accelerator and the detection systems. In parallel, advanced theoretical models will be developed to extract the nuclear structure information from the measured cross sections.
© The Authors, published by EDP Sciences, 2018
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