Charge-state distributions of 20Ne ions emerging from thin foils

Cavallaro, M.; Santagati, G.; Cappuzzello, F.; Carbone, D.; Linares, R.; Torresi, D.; Acosta, L.; Agodi, C.; Bonanno, D.; Bongiovanni, D.; Borello‐Lewin, T.; Boztosun, I.; Calabrese, Salvatore; Calvo, D.; Lomelí, E.R. Chávez; Faria, P. N. de; Delaunay, F.; Deshmukh, N.; Finocchiaro, P.; Fisichella, M.; Foti, A.; Gallo, G.; Hacisalihoglu, A.; Iazzi, F.; Introzzi, R.; Lanzalone, G.; Presti, D. Lo; Longhitano, F.; Medina, N. H.; Muoio, A.; Oliveira, J. R. B.; Pakou, A.; Pandola, L.; Petrascu, H.; Pinna, F.; Reito, S.; Russo, G.; Sgouros, O.; Solakcı, S. O.; Soukeras, V.; Souliotis, G. A.; Spatafora, A.; Tudisco, S.; Yildirim, Aydın; Zagatto, V. A. B.

doi:10.1016/j.rinp.2019.102191

Cited by 24 publications

(18 citation statements)

References 22 publications

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“…The data reduction strategy, including position calibration of the FPD, identification of the ejectiles of interest and reconstruction of the momentum vector at the target by inversion of the transport equations following the same method presented in previous publications [31][32][33][34]. This procedure also allows an accurate determination of the overall detection efficiency, as presented in ref.…”

Section: Experiments and Data Reductionmentioning

confidence: 99%

Ne20+Ge76 elastic and inelastic scattering at 306 MeV

Spatafora¹,

Cappuzzello²,

Carbone³

et al. 2019

Phys. Rev. C

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Background: Double Charge Exchange (DCE) nuclear reactions have recently attracted much interest as tools to provide experimentally driven information about the Nuclear Matrix Elements of interest in the context of neutrino-less double beta decay. In this framework a good description of the reaction mechanism and a complete knowledge of the initial and final state interactions is mandatory. Presently, not enough is known about the details of the optical potentials and nuclear response to isospin operators for many of the projectile-target systems proposed for future DCE studies. Among these, 20 Ne + 76 Ge DCE reaction is particularly relevant due to its connection with 76 Ge double beta decay. Purpose: Characterization of the initial state interaction for the 20 Ne + 76 Ge reactions at 306 MeV bombarding energy: determination of the optical potential and exploration of the role of the couplings between elastic channel and inelastic transitions to the first low-lying excited states. Methods: Determination of the experimental elastic and inelastic scattering cross section angular distributions. Comparison of the theoretical predictions adopting different models of optical potentials with the experimental data. Evaluation of the coupling effect through the comparison of the Distorted Wave Born Approximation calculations with the Coupled Channels ones. Results: Optical Models fail in the description of the elastic angular distribution above the grazing angle (∼ 9.4 • ). A correction in the geometry to effectively account for deformation of the involved nuclear systems improves the agreement up to about 14 • . Coupled channels effects are crucial to obtain a good agreement at large angles in the elastic scattering cross section. Conclusions: The analysis of elastic and inelastic scattering data turned out to be a powerful tool to explore the initial and final state interaction in heavy ion nuclear reactions also at high transferred momenta. * Electronic address: alessandro.spatafora@lns.infn.it † Electronic address: cappuzzello@lns.infn.it

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Section: Experiments and Data Reductionmentioning

confidence: 99%

Ne20+Ge76 elastic and inelastic scattering at 306 MeV

Spatafora¹,

Cappuzzello²,

Carbone³

et al. 2019

Phys. Rev. C

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“…The discovery of neutrino oscillations brought the topic back to the debate of the scientific community and has been driving theoretical and experimental efforts. Promising experiments to establish the Majorana or Dirac nature of neutrinos are presently conceived of by searching for the neutrinoless double beta (0νββ) decay in nuclei such as 48 Ca, 76 Ge, 116 Cd and 130 Te, 136 Xe, with half-lives higher than 10 25 y [2][3][4]. The observation of the 0νββ decay would prove the Majorana nature of neutrinos, and the measurement of the half-life would allow for the determination of the effective neutrino mass, once appropriate nuclear matrix elements (NMEs) are accurately known [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Initial State Interaction for the 20Ne + 130Te and 18O + 116Sn Systems at 15.3 AMeV from Elastic and Inelastic Scattering Measurements

et al. 2021

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Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context of neutrinoless double-β decay. To achieve this goal, a detailed description of the reaction mechanism is mandatory. This requires the full characterization of the initial and final-state interactions, which are poorly known for many of the projectile-target systems involved in future DCE studies. Among these, we intend to study the 20Ne + 130Te and 18O + 116Sn systems at 15.3 AMeV, which are particularly relevant due to their connection with the 130Te→130Xe and 116Cd→116Sn double-β decays. We measure the elastic and inelastic scattering cross-section angular distributions and compare them with theoretical calculations performed in the optical model, one-step distorted wave Born approximation, and coupled-channel approaches using the São Paulo double-folding optical potential. A good description of the experimental data in the whole explored range of transferred momenta is obtained provided that couplings with the 21+ states of the projectile and target are explicitly included within the coupled-channel approach. These results are relevant also in the analysis of other quasi-elastic reaction channels in these systems, in which the same couplings should be included.

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“…The ejectiles to be identified in the NUMEN experiments are typically in the mass region 10 < A < 25 and atomic number 4 < Z < 12. Due to the interaction with the target (Cavallaro et al, 2019), ions characterized by different charge states (q) are distributed at the focal plane for each isotope species, making the ion identification more challenging. The adopted technique for particle identification (PID) with MAGNEX, described in Cappuzzello et al (2010), Calabrese et al (2018), guarantees a clear selection of the ions of interest in the whole range of A and Z produced in the collision, provided that precise measurements of the energy loss ( E), the residual energy (E r ) and the horizontal position at the focus (X foc ) are available.…”

Section: The Particle Identification Systemmentioning

confidence: 99%

The NUMEN Project: An Update of the Facility Toward the Future Experimental Campaigns

Cappuzzello

Acosta

Agodi

et al. 2021

Front. Astron. Space Sci.

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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 accurate measurements of the cross sections of heavy-ion induced double charge-exchange reactions. In particular, the (18O, 18Ne) and (20Ne, 20O) reactions are adopted 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 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 by more than two orders of magnitude. To this purpose, frontier technologies are being developed for both the accelerator and the detection systems. An update description of the NUMEN project is presented here, focusing on recent achievements from the R&D activity.

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Charge-state distributions of 20Ne ions emerging from thin foils

Cited by 24 publications

References 22 publications

Ne20+Ge76 elastic and inelastic scattering at 306 MeV

Ne20+Ge76 elastic and inelastic scattering at 306 MeV

Initial State Interaction for the 20Ne + 130Te and 18O + 116Sn Systems at 15.3 AMeV from Elastic and Inelastic Scattering Measurements

The NUMEN Project: An Update of the Facility Toward the Future Experimental Campaigns

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