28 research outputs found
Recent results on heavy-ion direct reactions of interest for 0νββ decay at INFN LNS
Neutrinoless double beta decay of nuclei, if observed, would have important implications on fundamental physics. In particular it would give access to the effective neutrino mass. In order to extract such information from 0νββ decay half-life measurements, the knowledge of the Nuclear Matrix Elements (NME) is of utmost importance. In this context the NUMEN and the NURE projects aim to extract information on the NME by measuring cross sections of Double Charge Exchange reactions in selected systems which are expected to spontaneously decay via 0νββ. In this work an overview of the experimental challenges that NUMEN is facing in order to perform the experiments with accelerated beams and the research and development activity for the planned upgrade of the INFN-LNS facilities is reported
Recent results on Heavy-Ion induced reactions of interest for 0νββ decay
An updated overview of recent results on Heavy-Ion induced reactions of interest for neutrinoless double beta decay is reported in the framework of the NUMEN project. The NUMEN idea is to study heavy-ion induced Double Charge Exchange (DCE) reactions with the aim to get information on the nuclear matrix elements for neutrinoless double beta (0νββ) decay. Moreover, to infer the neutrino average masses from the possible measurement of the half- life of 0νββ decay, the knowledge of the nuclear matrix elements is a crucial aspec
Recent results on heavy-ion induced reactions of interest for neutrinoless double beta decay at INFN-LNS
Abstract. The possibility to use a special class of heavy-ion induced direct reactions, such as double charge exchange reactions, is discussed in view of their application to extract information that may be helpful to determinate the nuclear matrix elements entering in the expression of neutrinoless double beta decay halflife. The methodology of the experimental campaign presently running at INFN - Laboratori Nazionali del Sud is reported and the experimental challenges characterizing such activity are describe
Recent results on heavy-ion induced reactions of interest for neutrinoless double beta decay at INFN-LNS
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 (0v beta beta). In this view measurements
of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross
sections are performed with high-accuracy. In particular, the
(O-18,(18)Nc) and ((20)Nc, O-20) reactions are used as tools for
beta(+)beta(+) and beta(-)beta(-) 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 under way in order to
increase the experimental dataset of more than two orders of magnitude,
still preserving the high sensitivity of the present set-up. When
accomplished this effort will make the INFN-LNS as the state-of-the-art
research infrastructure for the systematic study of all the cases of
interest for 0v beta beta. In this view, frontiers technologies are
going to be adopted 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
section
The NUMEN Project @ LNS: Status and Perspectives
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 (0v beta beta), by high-accuracy
measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE)
reaction cross sections. In particular, the (O-18,Ne-18) and (Ne-20,
O-20) reactions are used as tools for beta(+)beta(+) and beta(-)beta(-)
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
Selection of an escape variant of Borrelia burgdorferi by use of bactericidal monoclonal antibodies to OspB
Recent results on heavy-ion direct reactions of interest for 0νββ decay at INFN - LNS
Neutrinoless double beta decay of nuclei, if observed, would have important implications on fundamental physics. In particular it would give access to the effective neutrino mass. In order to extract such information from 0νββ decay half-life measurements, the knowledge of the Nuclear Matrix Elements (NME) is of utmost importance. In this context the NUMEN and the NURE projects aim to extract information on the NME by measuring cross sections of Double Charge Exchange reactions in selected systems which are expected to spontaneously decay via 0νββ. In this work an overview of the experimental challenges that NUMEN is facing in order to perform the experiments with accelerated beams and the research and development activity for the planned upgrade of the INFN-LNS facilities is reported.peerReviewe
Recent results on heavy-ion direct reactions of interest for 0 nu beta beta decay at INFN - LNS
Neutrinoless double beta decay of nuclei, if observed, would have
important implications on fundamental physics. In particular it would
give access to the effective neutrino mass. In order to extract such
information from 0 nu beta beta decay half-life measurements, the
knowledge of the Nuclear Matrix Elements (NME) is of utmost importance.
In this context the NUMEN and the NURE projects aim to extract
information on the NME by measuring cross sections of Double Charge
Exchange reactions in selected systems which are expected to
spontaneously decay via 0 nu beta beta. In this work an overview of the
experimental challenges that NUMEN is facing in order to perform the
experiments with accelerated beams and the research and development
activity for the planned upgrade of the INFN-LNS facilities is reported