A5015453437- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Rare-earth and actinide compounds
- Radiopharmaceutical Chemistry and Applications
- Graphite, nuclear technology, radiation studies
- Radiation Therapy and Dosimetry
- Gamma-ray bursts and supernovae
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Medical Imaging Techniques and Applications
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
Universidade de São Paulo
2016-2025
Universidade Cidade de São Paulo
2021
Institut National de Physique Nucléaire et de Physique des Particules
2015-2021
Centre National de la Recherche Scientifique
2015-2021
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2021
Université Paris-Saclay
2021
Université Paris-Sud
2015-2019
Instituto Nacional de Investigaciones Nucleares
2008-2017
Institut de Physique
2015-2016
Australian National University
2016
The fusion of ${}^{6}\mathrm{He}$ with a ${}^{209}\mathrm{Bi}$ target has been studied at energies near to and below the Coulomb barrier. Despite weak binding valence neutrons in ${}^{6}\mathrm{He}$, little evidence is found for suppression due projectile breakup. Instead, large enhancement sub-barrier observed. It suggested that this may arise from coupling positive $Q$ value neutron transfer channels, resulting ``neutron flow'' between target.
The structure of the halo nucleus 11Be has been studied using reaction 9Be(11Be,10Be+gamma)X at 60 MeV/nucleon. ground state is determined by comparing experimental cross sections to a calculation combining spectroscopic factors from shell model with l-dependent single-particle obtained in an eikonal model. This experiment shows dominant 1s character and indicates small contribution 0d admixture wave function. After correction for approximately 22% intensity excited levels, clean precise...
Elastic scattering of $^{8}\mathrm{B}$, $^{7}\mathrm{Be}$, and $^{6}\mathrm{Li}$ on a $^{58}\mathrm{Ni}$ target has been measured at energies near the Coulomb barrier. Optical-model fits were made to experimental angular distributions, total reaction cross sections deduced. A comparison with other systems provides striking evidence for proton-halo effects $^{8}\mathrm{B}$ reactions. As opposed situation neutron-halo nucleus $^{6}\mathrm{He}$, which particle transfer dominates, ``extra''...
The present status of fusion reactions involving light (A < 20) radioactive projectiles at energies around the Coulomb barrier (E 10 MeV per nucleon) is reviewed, emphasizing measurements made within last decade. Data on elastic scattering (providing total reaction cross section information) and breakup channels for involved systems, demonstrating relationship between these channel, are also reviewed. Similarities differences in behavior data concerning halo nuclei, weakly-bound but less...
Reaction products from the interaction of ${}^{6}\mathrm{He}$ with ${}^{209}\mathrm{Bi}$ have been measured at energies near Coulomb barrier. A ${}^{4}\mathrm{He}$ group remarkable intensity, which dominates total reaction cross section, has observed. The angular distribution suggests that it results primarily a direct nuclear process. It is likely this transfer and/or breakup channel doorway state accounts for previously observed large sub-barrier fusion enhancement in system.
The elastic scattering of the radioactive halo nucleus 6He on 27Al target was measured at four energies close to Coulomb barrier using RIBRAS (Radioactive Ion Beams in Brazil) facility. Sao Paulo Potential(SPP) used and its diffuseness imaginary strength were adjusted fit angular distributions. Reaction cross-sections extracted from optical model fits. reduced reaction are similar those for stable, weakly bound projectiles as {6,7}Li, 9Be larger than tightly projectile 16O 27Al.
Fusion cross sections were measured for the exotic proton-halo nucleus ⁸B incident on a ⁵⁸Ni target at several energies near Coulomb barrier. This is first experiment to report fusion of nucleus. The resulting excitation function shows striking enhancement with respect expectations normal projectiles. Evidence presented that sum and breakup yields saturates total reaction section.
The elastic scattering of $^{6}\mathrm{He}$ on $^{120}\mathrm{Sn}$ has been measured at four energies above the Coulomb barrier using beam produced RIBRAS (Radioactive Ion Beams in Brasil) facility. angular distributions have analyzed with optical model and three- four-body continuum-discretized coupled-channels calculations. total reaction cross sections derived compared other systems similar masses.
Introduction A phenomenological analysis, based on distances, has been performed for elastic scattering data induced by tightly bound ( 11 B, 12 C, and 16 O), weakly 6 Li, 7 Be, 9 Be), exotic He, 8 15 C) nuclei light 27 Al), medium 58 Ni 120 Sn), heavy mass 208 Pb) targets, respectively, at energies close to the Coulomb barrier. Methods The cross-section angular distributions have converted as a function of distance closest approach. Results From fitting critical interaction strong...
Introduction Direct reactions are crucial tools for accessing properties of the atomic nucleus. Fundamental and exotic phenomena such as collective modes, pairing, weakbinding effects evolution single-particles energies can be investigated in peripheral collisions between a heavy nucleus light target. The necessity using inverse kinematics to reveal how these structural change with isospin imbalance renders direct challenging technique when missing mass method. Methods In this scenario,...
The angular distribution for the breakup of 8B-->7Be+p on a 58Ni target has been measured at an incident energy 25.75 MeV. data are inconsistent with first-order theories but remarkably well described by calculations including higher-order effects. comparison theory illustrates importance inclusion exotic proton halo structure 8B in accounting data.
Angular distributions for the elastic scattering of $^{8}\mathrm{B}$, $^{7}\mathrm{Be}$, and $^{6}\mathrm{Li}$ on a $^{12}\mathrm{C}$ target have been measured at ${E}_{\mathrm{lab}}=25.8$, 18.8, 12.3 MeV, respectively. The analyses these angular performed in terms optical model using Woods-Saxon double-folding type potentials. effect breakup ${}^{8}\mathrm{B}+{}^{12}\mathrm{C}$ is investigated by performing coupled-channels calculations with continuum discretized coupled-channel method...
We present angular distributions of the He6+Ni58 scattering measured at three bombarding energies above Coulomb barrier: Elab=12.2 MeV,16.5 MeV,and 21.7 MeV. The have been analysed in terms three- and four-body Continuum-Discretized Coupled-Channels calculations considering effect 6He breakup. A behaviour cross section large angles has observed which was reproduced only by calculation.
Angular distributions of quasielastic scattering and breakup the neutron-rich halo nucleus 11Be on a 208Pb target at an incident energy 140 MeV (about 3.5 times Coulomb barrier) were measured HIRFL-RIBLL. A strong suppression nuclear interference peak is observed in angular distribution. The result demonstrates for first time persistence coupling effect reported so far reaction systems involving neutron-halo nuclei this relatively high energy. cross sections are satisfactorily reproduced by...
New data for the $^{6}\mathrm{He}+^{9}\mathrm{Be}$ reaction at ${E}_{\mathrm{lab}}=16.2$ and 21.3 MeV have been taken analyzed. The effect of collective couplings to excited states target has studied by means coupled-channels calculations, using a double-folding potential bare interaction between colliding nuclei, supplemented with phenomenological imaginary part Woods-Saxon type. In addition, three- four-body continuum-discretized calculations performed investigate projectile breakup on...
We present $^{8}\mathrm{B}+^{27}\mathrm{Al}$ elastic scattering angular distributions for the proton-halo nucleus $^{8}\mathrm{B}$ at two energies above Coulomb barrier, namely ${E}_{\mathrm{lab}}=15.3$ and 21.7 MeV. The experiments were performed in Radioactive Ion Beams Brasil facility (RIBRAS) S\~ao Paulo, TwinSol University of Notre Dame, USA. measured range 15--80 degrees. Optical model continuum discretized coupled channels calculations performed, total reaction cross sections derived....
Elastic scattering and breakup angular distributions of the weakly bound radioactive nucleus $^{8}\mathrm{B}$ on a $^{208}\mathrm{Pb}$ target at an incident energy 238 MeV, which corresponds to four times Coulomb barrier, have been measured HIRFL-RIBLL facility (Institute Modern Physics, Lanzhou). The data analyzed using optical model continuum discretized coupled channels (CDCC) formalism. calculated elastic do not show any significant rainbow suppression. distribution for reaction was...