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Título del libro:
Título del capítulo: The NUMEN project @ LNS: Status and perspectives

Autores UNAM:
LUIS ARMANDO ACOSTA SANCHEZ; ROELOF BIJKER; EFRAIN RAFAEL CHAVEZ LOMELI; KAREN PATRICIA GAITAN DE LOS RIOS; DANIEL JOSE MARIN LAMBARRI; JAVIER MAS RUIZ; HESIQUIO VARGAS HERNANDEZ;
Autores externos:

Idioma:

Año de publicación:
2019
Resumen:

The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0?ßß), by high-accuracy measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for ß+ß+ and ß-ß- decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the total reaction cross section much larger (a few b), thus a high sensitivity and a large rejection capability are demanded to the experimental set-up. This limits the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to increase the experimental yield of at least two orders of magnitude, still keeping the high sensitivity of the present set-up, making it feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are being developed in order to extract the nuclear structure information from the measured cross sections. © 2019 Author(s).


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