D. Torresi
A5023575536- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Neutrino Physics Research
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Advanced NMR Techniques and Applications
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Chemical Physics Studies
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Quantum, superfluid, helium dynamics
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Nuclear Materials and Properties
- Radiopharmaceutical Chemistry and Applications
- Inorganic Fluorides and Related Compounds
- High-Energy Particle Collisions Research
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2012-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2015-2024
Istituto Nazionale di Fisica Nucleare
2010-2024
University of Catania
2011-2021
Campbell Collaboration
2020-2021
University of Birmingham
2017-2021
École Nationale Supérieure d'Ingénieurs de Caen
2010-2021
Centre National de la Recherche Scientifique
2010-2021
Université de Caen Normandie
2021
Normandie Université
2021
Collisions induced by Be9,10,11 on a Zn64 target at the same c.m. energy were studied. For first time, strong effects of Be11 halo structure elastic-scattering and reaction mechanisms energies near Coulomb barrier are evidenced experimentally. The cross section nucleus shows unusual behavior in Coulomb-nuclear interference peak angular region. extracted total-reaction for collision is more than double ones measured collisions Be9,10. It shown that such enhancement with due to transfer...
In this paper details of the experimental procedure and data analysis collision ${}^{11}\mathrm{Be}{+}^{64}$Zn around Coulomb barrier are described discussed in framework different theoretical approaches. a previous work [A. Di Pietro et al., Phys. Rev. Lett. 105, 022701 (2010).], elastic scattering angular distribution collisions ${}^{9,10}\mathrm{Be}{+}^{64}$Zn as well for quasielastic transfer/breakup cross sections reaction were briefly reported. The suppression Coulomb-nuclear...
The sub-barrier fusion excitation function of 40Ca + 96Zr has been measured down to cross sections ≃2.4 μb, i.e. two orders magnitude smaller than obtained in a previous experiment, where the this system was found be greatly enhanced with respect 90Zr, and need coupling transfer channels suggested relying on coupled-channels calculations. purpose work investigate behavior far below barrier, thereby disentangling elusive interplay effects due inelastic couplings, couplings and, possibly,...
Abstract Fluorine abundance determination is of great importance in stellar physics to understand s-elements production and mixing processes asymptotic giant branch (AGB) stars. Up now, theoretical models overproduce F abundances AGB stars with respect the observed values, thus calling for further investigation reactions involving fluorine. In particular, 19 F( p , α ) 16 O reaction main destruction channel fluorine at bottom convective envelope stars, an H-rich environment where it can...
Abstract Studying interactions of radioactive ions with neutrons is particularly demanding and has been performed only in a few cases. Some these are crucial several astrophysical contexts. In the present work, case 7 Be destruction induced by (n, α ) reaction investigated at energies typical primordial nucleosynthesis means Trojan Horse Method applied to 2 H( Be, αα )p quasi-free reaction. The Be(n, 4 He cross-section measured single experiment from ∼2 MeV down cosmological energies....
Background: Charge-exchange (CE) reactions offer a major opportunity to excite nuclear isovector modes, providing important clues about the interaction in medium. Moreover, double charge-exchange are proving be tempting tool access transition matrix elements (NMEs) related beta-decay processes. The latter also of crucial importance extract neutrino properties from half-life hypothetical neutrinoless beta decay and search for physics beyond standard model.Purpose: Through multichannel...
Background: Single-charge-exchange reactions are appropriate tools to study the nuclear response one-particle/one-hole isospin probes, gaining additional interest from connection beta decay. This analogy has been recently extended second order, connecting double-charge-exchange and double decays. Nowadays, availability of powerful experimental setups advanced theories models allows one access precious information on key structure aspects embedded in widely sought neutrinoless decay.Purpose:...
Background: In recent years, the NUMEN project has highlighted that systematic study of double charge exchange (DCE) nuclear reactions could provide precious information on matrix elements neutrinoless $\ensuremath{\beta}$ decay. To achieve this goal, a multichannel approach was adopted, where plethora different reaction channels is measured under same experimental conditions and analyzed in coherent framework. context, initial (ISI) final (FSI) state interactions are fundamental building...
Background: A systematic exploration of one-nucleon transfer reactions induced by the ($^{18}\mathrm{O},^{19}\mathrm{F}$) and ($^{18}\mathrm{O},^{17}\mathrm{O}$) on different targets ($^{12}\mathrm{C}, ^{16}\mathrm{O}, ^{27}\mathrm{Al}, ^{40}\mathrm{Ca}, ^{48}\mathrm{Ti}, ^{76}\mathrm{Se}, ^{116}\mathrm{Sn}$) is being performed at Istituto Nazionale di Fisica Nucleare--Laboratori Nazionali del Sud (INFN-LNS) beam energies higher than Coulomb barrier. featured aspect adoption a multichannel...
The elastic scattering of the weakly bound radioactive nuclei $^{8}\mathrm{B}$ and $^{7}\mathrm{Be}$ from a $^{208}\mathrm{Pb}$ target was measured for first time in energy range around Coulomb barrier. data were analyzed using optical model continuum discretized coupled channels (CDCC) formalisms. reaction cross sections extracted fits clearly indicate remarkably enhanced probability very (${S}_{p}=137.5\phantom{\rule{0.16em}{0ex}}\mathrm{keV}$) compared to similar mass interacting with...
Background: Heavy-ion induced two-nucleon transfer reactions are powerful tools to reveal peculiar aspects of the atomic nucleus, such as pairing correlations, single-particle and collective degrees freedom, more. Also, these processes in competition with direct meson exchange double charge reactions, which have recently attracted great interest due their possible connection neutrinoless double-\ensuremath{\beta} decay. In this framework, exploration $^{20}\mathrm{Ne}+^{116}\mathrm{Cd}$...
The 40 Ca( 18 O, F) K single charge exchange (SCE) reaction is explored at an incident energy of 275 MeV and analyzed consistently by collecting the elastic scattering inelastic data under same experimental conditions. Full quantum-mechanical SCE calculations direct mechanism are performed including microscopic nuclear structure inputs adopting either a bare optical potential or coupled channel equivalent polarization (CCEP) constrained data. describes magnitude shape angular distributions...
Two-nucleon transfer reactions are essential tools to investigate specific features of the nuclear structure, such as correlation among valence particles in process. Besides, may be an important channel take into account charge-exchange processes since they can represent a competing contribution final cross section. The two-proton pickup reaction $^{40}\mathrm{Ca}(^{18}\mathrm{O},^{20}\mathrm{Ne})\phantom{\rule{0.16em}{0ex}}^{38}\mathrm{Ar}$ has been measured at 270 MeV, and angular...
Single-nucleon transfer reactions are processes that selectively probe single-particle components of the populated many-body nuclear states. In this context, recent efforts have been made to build a unified description rich spectroscopy accessible in heavy-ion collisions. An example multichannel approach is study competition between successive nucleon and charge exchange reactions, latter being particular interest context single double beta decay studies. To extent, one-proton pickup...
Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context neutrinoless double-β decay. To achieve this goal, a detailed description reaction mechanism is mandatory. This requires full characterization initial and final-state interactions, which are poorly known for many projectile-target systems involved future DCE studies. Among these, we intend to study 20Ne + 130Te 18O 116Sn at 15.3 AMeV, particularly...
NUMEN proposes an innovative technique to access the nuclear matrix elements entering expression of lifetime double beta decay by cross-section measurements heavy-ion induced Double Charge Exchange (DCE) reactions. Despite fact that two processes, namely neutrinoless and DCE reactions, are triggered weak strong interaction respectively, important analogies suggested. The basic point is coincidence initial final state many-body wave functions in types processes formal similarity transition...
Purpose: We want to analyze transitions low-lying excited states of the residual and ejectile nuclei in 76Se(18O, 17O) 77Se one-neutron stripping reaction at 275-MeV incident energy determine role single-particle core excitation description measured cross sections. In addition, we explore sensitivity calculated section different nuclear structure models. Methods: The spectrum differential cross-section angular distributions are using MAGNEX large acceptance magnetic spectrometer for...
Elastic-scattering angular distributions for the $^{6}\mathrm{Li}+^{64}\mathrm{Zn}$ system were measured at eight beam energies from below to above Coulomb barrier, $12.0\ensuremath{\leqslant}{E}_{\mathrm{lab}}\ensuremath{\leqslant}22.0$ MeV. The experimental data analyzed within optical model study energy dependence of interaction potential and obtain total reaction cross sections. results obtained using several potentials show similar behavior. strengths real imaginary suggests presence...
Fusion and transfer $+$ breakup channels have been studied in the collision induced by two-neutron-halo ${}^{6}$He on a ${}^{64}$Zn target at energies from below to above Coulomb barrier. For comparison, reaction stable isotope ${}^{4}$He same has studied. The fusion cross section measured using an activation technique, detecting off-line delayed x-ray activity following electron capture decay of evaporation residues. New measurements sub-barrier performed order cover energy range compare...
Excitation functions for the production of heavy residues have been measured collisions ${}^{6,7}\mathrm{Li}+{}^{64}\mathrm{Zn}$ at energies around and below Coulomb barrier. The cross sections residue using an activation technique, detecting off-line characteristic atomic x-rays emitted in electron capture decay reaction products. experimental relative yields compared with statistical model calculations performed by code cascade. Such a comparison suggests that is dominated complete fusion...
Fusion cross sections were measured for ${}^{8}$B + ${}^{28}$Si at near-barrier energies by detecting the alpha particles produced in evaporation process. The results present a small suppression with respect to one-barrier penetration model predictions, which could be attributed incomplete fusion processes and do not differ appreciably from obtained weakly bound but stable projectiles on same target. Comprehensive comparisons of sub- various light support simple tunneling probability slight...