A5070693057- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Boron Compounds in Chemistry
- Biofield Effects and Biophysics
- Gamma-ray bursts and supernovae
- Advanced Chemical Physics Studies
- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Astro and Planetary Science
- Radiation Detection and Scintillator Technologies
- Radiopharmaceutical Chemistry and Applications
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2016-2025
Università degli Studi di Enna Kore
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
1998-2024
First Technical University
2023-2024
Fermi National Accelerator Laboratory
2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2024
University of Pisa
2024
Pacific Northwest National Laboratory
2024
Universidade de São Paulo
2009-2024
Royal Holloway University of London
2024
We present the results of a search for dark matter WIMPs in mass range below 20 GeV/c^2 using target low-radioactivity argon. The data were obtained DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso (LNGS). analysis is based on ionization signal, which time projection chamber fully efficient 0.1 keVee. observed rate detector 0.5 keVee about 1.5 events/keVee/kg/day and almost entirely accounted by known background sources. obtain 90% C.L. exclusion limit above 1.8 spin-independent...
The DarkSide-50 direct-detection dark matter experiment is a dual-phase argon time projection chamber operating at Laboratori Nazionali del Gran Sasso. This paper reports on the blind analysis of (16,660+-270) kg d exposure using target low-radioactivity extracted from underground sources. We find no events in selection box and set 90% C.L. upper limit matter-nucleon spin-independent cross section 1.14E-44 cm^2 (3.78E-44 cm^2, 3.43E-43 cm^2) for WIMP mass 100 GeV/c^2 (1 TeV/c^2, 10 TeV/c^2).
We present new constraints on sub-GeV dark matter particles scattering off electrons in argon based an analysis of ionization signal data from the DarkSide-50 detector.
We report on the search for dark matter weakly interacting massive particles (WIMPs) in mass range below $10\text{ }\text{ }\mathrm{GeV}/{\mathrm{c}}^{2}$, from analysis of entire dataset acquired with a low-radioactivity argon target by DarkSide-50 experiment at Laboratori Nazionali del Gran Sasso. The new benefits more accurate calibration detector response, improved background model, and better determination systematic uncertainties, allowing us to accurately model rate spectra down...
We present a search for dark matter particles with sub-GeV/c^{2} masses whose interactions have final state electrons using the DarkSide-50 experiment's (12 306±184) kg d low-radioactivity liquid argon exposure. By analyzing ionization signals, we exclude new parameter space matter-electron cross section σ[over ¯]_{e}, axioelectric coupling constant g_{Ae}, and photon kinetic mixing κ. also set first direct-detection constraints on angle |U_{e4}|^{2} keV/c^{2} sterile neutrinos.
The 19F(p, α)16O reaction is an important fluorine destruction channel in the proton-rich outer layers of asymptotic giant branch (AGB) stars and it might also play a role hydrogen-deficient post-AGB star nucleosynthesis. So far, available direct measurements do not reach energy region astrophysical interest (Ecm ≲ 300 keV), because hindrance effect Coulomb barrier. Trojan Horse (TH) method was thus used to access this region, by extracting quasi-free contribution 2H(19F, α16O)n 19F(3He,...
Experimental results of the elastic scattering ${}^{6}$He on ${}^{208}$Pb at ${E}_{\mathrm{LAB}}=22$ MeV, measured CRC facility (Louvain-la-Neuve, Belgium), are presented, including ${}^{4}$He production channel. These data were taken with full angular coverage and high resolution. Both experimental cross sections compared continuum discretized coupled channels distorted-wave Born approximation calculations, where direct breakup transfer to processes considered. The confirm absence Coulomb...
The decay path of the Hoyle state in 12C (Ex=7.654 MeV) has been studied with 14N(d,α2)12C(7.654) reaction induced at 10.5 MeV. High resolution invariant mass spectroscopy techniques have allowed us to unambiguously disentangle direct and sequential decays passing through ground 8Be. Thanks almost total absence background attained resolution, a fully contribution width observed. is negligible, an upper limit 0.043% (95% C.L.). precision this result about factor 5 higher than previous...
Measurement of nuclear cross sections at astrophysical energies involving unstable species is one the most challenging tasks in experimental physics. The use indirect methods often unavoidable this scenario. In paper Trojan horse method applied for first time to a radioactive ion beam-induced reaction studying ${}^{18}\mathrm{F}(p,\ensuremath{\alpha}$)${}^{15}\mathrm{O}$ process low relevant astrophysics via three-body...
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....
The 18O(p, α)15N reaction is of primary importance to pin down the uncertainties, due nuclear physics input, affecting present-day models asymptotic giant branch stars. Its rate can modify both fluorine nucleosynthesis inside such stars and oxygen nitrogen isotopic ratios, which allow one constrain proposed astrophysical scenarios. Thus, an indirect measurement low-energy region has been performed access, for first time, range relevance application. In particular, a full, high-accuracy...
The $^{17}\mathrm{O}$($p,\ensuremath{\alpha}$)$^{14}\mathrm{N}$ reaction is of fundamental relevance in several astrophysical scenarios, such as novae, asymptotic giant branch nucleosynthesis, and $\ensuremath{\gamma}$-ray astronomy. We report on the indirect measurement bare-nucleus cross section low-energy region. In particular, two resonances at ${E}_{R}^{\mathrm{c}.\mathrm{m}.}=65$ keV ${E}_{R}^{\mathrm{c}.\mathrm{m}.}=183$ keV, which dominate rate inside Gamow window, have been...
The reaction ${}^{17}\mathrm{O}(n,\ensuremath{\alpha}){}^{14}\mathrm{C}$ was studied at energies from ${E}_{\mathrm{c}.\mathrm{m}.}=0$ to ${E}_{\mathrm{c}.\mathrm{m}.}=350\phantom{\rule{0.28em}{0ex}}\mathrm{keV}$ by using the quasifree deuteron breakup in three-body ${}^{17}\mathrm{O}+d\ensuremath{\rightarrow}\ensuremath{\alpha}+{}^{14}\mathrm{C}+p$, which extended Trojan Horse indirect method (THM) neutron-induced reactions. It is found that ${}^{18}\mathrm{O}$ excited state...
The $^{18}\mathrm{O}(p,\ensuremath{\alpha})^{15}\mathrm{N}$ reaction is of primary importance in several astrophysical scenarios, including fluorine nucleosynthesis inside asymptotic giant branch stars as well oxygen and nitrogen isotopic ratios meteorite grains. Thus the indirect measurement low energy region has been performed to reduce nuclear uncertainty on theoretical predictions. In particular strength 20 90 keV resonances deduced change rate evaluated.
A new measurement of the 11B(p,?0)8Be has been performed applying Trojan horse method (THM) to 2H(11B,?80Be)n quasi-free reaction induced at a laboratory energy 27 MeV. The astrophysical S(E) factor extracted from ?600 keV down zero by means an improved data analysis technique and it compared with direct available in literature. range investigated here overlaps region light element LiBeB stellar burning that future aneutronic fusion power plants using 11B+p fuel cycle. investigation...
The quasi-free break-up of deuteron was used to study the neutron-induced 6Li + n reaction via 2H(6Li, α3H)p. aim experiment check whether can be considered as a source virtual neutrons. This done by studying excitation function 6Li(n, α)3H two-body at low energy where resonance corresponding excited level 7.454 MeV 7Li is present. Two experimental runs were performed Laboratori Nazionali del Sud (LNS) in Catania, Italy. In both experiments, and position outgoing α 3H particles measured...
Abstract The observational 19 F abundance in stellar environments systematically exceeds the predicted one, thus representing one of unsolved challenges for modeling. It is therefore clear that further investigation needed this field. In work, we focus our attention on measurement <?CDATA ${}^{19}{\rm{F}}{(\alpha ,p)}^{22}\mathrm{Ne}$?> reaction astrophysical energy range, between 0.2 and 0.8 MeV (far below Coulomb barrier, 3.8 MeV), as it represents main destruction channel He-rich...
Crucial information on nova nucleosynthesis can be potentially inferred from γ-ray signals powered by 18F decay. Therefore, the reaction network producing and destroying this radioactive isotope has been extensively studied in last years. Among those reactions, 18F(p, α)15O cross-section measured means of several dedicated experiments, both using direct indirect methods. The presence interfering resonances energy region astrophysical interest reported many authors including recent...
The study of the $^{17}\mathrm{O}(n,\ensuremath{\alpha})^{14}\mathrm{C}$ reaction has been performed by means Trojan horse method (THM) applied to quasifree $^{2}\mathrm{H}(^{17}\mathrm{O},\ensuremath{\alpha}^{14}\mathrm{C})^{1}\mathrm{H}$ induced at a beam energy 43.5 MeV. THM allowed us 8121-keV $^{18}\mathrm{O}^{*}$ resonant level, for which previous investigation pointed out ability overcome centrifugal barrier suppression effects in entrance channel. Here, view developments reactions,...