A5017082532- Nuclear physics research studies
- Astronomical and nuclear sciences
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Rare-earth and actinide compounds
- Cold Fusion and Nuclear Reactions
- Quantum chaos and dynamical systems
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2017-2021
University of Naples Federico II
2017-2021
Istituto Nazionale di Fisica Nucleare
2018
Background: The formation of superheavy nuclei in fusion reactions is suppressed by a competing quasifission process. competition between the compound nucleus and depends strongly on reaction entrance channel.Purpose: investigation fission processes $Z=120$ composite systems $^{52,54}\mathrm{Cr}+^{248}\mathrm{Cm}$ $^{68}\mathrm{Zn}+^{232}\mathrm{Th}$ reactions, their comparison with $^{64}\mathrm{Ni}+^{238}\mathrm{U}$ at energies vicinity Coulomb barrier.Methods: Mass-energy distributions...
Competition between the fusion-fission process and quasifission is currently actively debated. This paper discusses tests an experimental approach to distinguish based on different time scales for these two mechanisms. The emitted fragment angular momenta increase with longer interaction times, hence are larger slower process. These inferred from measured multiplicities of $\ensuremath{\gamma}$ rays.
Light charged particles emitted by the compound nucleus $^{158}\mathrm{Er}$ produced in reaction $^{32}\mathrm{S}$ $(180 \mathrm{MeV})+^{126}\mathrm{Te}$, at excitation energy ${E}_{x}=92$ MeV, have been measured Laboratori Nazionali di Legnaro coincidence with fission fragments and evaporation residues. The $4\ensuremath{\pi}$ detector array $8\ensuremath{\pi}\mathrm{LP}$ coupled to a system of parallel-plate avalanche counters detect residues has used. Data analyzed framework statistical...
Many observations strongly support the hypothesis that nuclei may fission through several independent modes (multimodal fission) interpreted as different prescission shapes and paths in a multidimensional potential energy landscape where shell effects are dominant. Mass distributions of fragments sensitive to appear be single humped (symmetric) or double (asymmetric). In many cases mixture both is observed. We propose here our study on 180 Hg. Binary formed reaction 68 Zn + 112 Sn → Hg at...
Inclusive and exclusive cross sections have been measured for different projectile breakup channels. It is observed that the inclusive are larger than ones. found other processes, besides direct channel, significantly contribute to A clear α+x cluster structure has from coincidence data.
Multi-nucleon transfer reactions are nowadays the only known mean to produce neutron-rich nuclei in Terra Incognita. The closed-shell region N=126 is crucial for both studying shell-quenching exotic and r-process, being its last "waiting-point". choice of suitable challenging a favorable case 136Xe+208Pb, near Coulomb barrier, because their neutron shell-closures play stabilizing role, favoring proton-transfer from lead xenon. TOF-TOF data were analyzed reconstruct mass-energy distribution...
Nuclear viscosity is an irreplaceable ingredient of nuclear fission collective dynamical models. It drives the exchange energy between variables and thermal bath single particle degrees freedom. Its dependence on shape temperature a matter controversy. By using systems intermediate fissility we have demonstrated in recent study that parameters larger for compact shapes, decreases deformations fissioning system, at variance with conclusions statistical model modified to include empirically...
Compound nucleus fission and quasi-fission are both binary decay channels whose common properties make the experimental separation between them difficult. A way to achieve this could be probe angular momentum of fragments. This can done detecting gamma rays in coincidence with two As a case study, reaction 32S + 197Au near Coulomb barrier has been performed at Tandem ALTO facility IPN ORSAY. ORGAM PARIS, different detectors arrays, coupled CORSET detector, two-arm time-of-flight...
Nuclear viscosity is an indispensable ingredient of the nuclear fission collective dynamical models. It governs exchange energy between variables and thermal bath. Its dependence on shape temperature a matter controversy. By using systems intermediate fissility we have demonstrated in recent study that parameters larger for compact shapes, decreases deformations fissioning system, at variance with conclusions statistical model modified to include empirically time scales. In this contribution...