A5010484834- Nuclear physics research studies
- Neutrino Physics Research
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- Cold Fusion and Nuclear Reactions
- Superconducting Materials and Applications
- Inorganic Fluorides and Related Compounds
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Solid-state spectroscopy and crystallography
- X-ray Spectroscopy and Fluorescence Analysis
- Radiopharmaceutical Chemistry and Applications
- Radioactive Decay and Measurement Techniques
- Magnetic confinement fusion research
- Nuclear Materials and Properties
Universidad de Sevilla
2015-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2016-2019
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2014-2018
University of Padua
2014-2018
Istituto Nazionale di Fisica Nucleare
2016
Centro Nacional de Aceleradores
2010-2014
Instituto de Estructura de la Materia
2010-2011
University of York
2010
Junta de Andalucía
2010
Universidad de Huelva
2010
The first measurement of the elastic scattering halo nucleus 11Li and its core 9Li on 208Pb at energies near Coulomb barrier is presented. 11Li+208Pb shows a strong reduction with respect to Rutherford cross section, even well below down very small angles. This drastic change differential section observed in consequence structure 11Li, as it not same energies. Four-body continuum-discretized coupled-channels calculations, based three-body model projectile, are found explain measured angular...
Recently a quantitative description of the two-neutron transfer reaction $^{12}\mathrm{C}(^{18}\mathrm{O},^{16}\mathrm{O})^{14}\mathrm{C}$ was performed and measured cross sections were successfully reproduced [M. Cavallaro et al., Phys. Rev. C 88, 054601 (2013)]. This task accomplished by combining nuclear structure calculations spectroscopic amplitudes full quantum mechanism. Verification such theoretical approach to other heavy systems is mandatory in order use...
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...
The inclusive breakup for the (11)Li + (208)Pb reaction at energies around Coulomb barrier has been measured first time. A sizable yield of (9)Li following dissociation observed, even well below barrier. Using first-order semiclassical perturbation theory excitation it is shown that probability data small angles can be used to extract effective energy as slope B(E1) distribution close threshold. Four-body continuum-discretized coupled-channels calculations, including both nuclear and...
The effect of core excitation in the elastic scattering and breakup a two-body halo nucleus on stable target is studied. structure weakly bound projectile described weak-coupling limit, assuming particle-rotor model. eigenfunctions associated eigenvalues are obtained by diagonalizing this Hamiltonian square-integrable basis (pseudostates). For radial coordinate between particle core, transformed harmonic oscillator (THO) used. reaction dynamics, an extension continuum-discretized...
Angular distributions of the elastic, inelastic, and breakup cross sections halo nucleus ^{11}Be on ^{197}Au were measured at energies below (E_{lab}=31.9 MeV) around (39.6 Coulomb barrier. These three channels unambiguously separated for first time reactions a high-Z target low energies. The experiment was performed TRIUMF (Vancouver, Canada). differential compared with different calculations: semiclassical, inert-core continuum-coupled-channels ones including core deformation. results show...
The theory of heavy ion single charge exchange reactions is reformulated. In momentum space the reaction amplitude factorizes into a product projectile and target transition form factors, folded with nucleon-nucleon isovector interaction distortion coefficient which accounts for initial final state ion-ion elastic interactions. multipole structure factors studied in detail Fermi-type non-spin flip Gamow-Teller-type spin transitions, also serving to establish connection nuclear beta decay....
Heavy ion double charge exchange reactions are described by sequential meson-exchange, corresponding to a single (DSCE) reaction mechanism. The theoretical formulation is discussed. fully quantum mechanical distorted wave 2-step calculations shown be reproduced very well approximating the intermediate propagator its pole part. role of ion-ion elastic interactions As first application, performed for Ca40(O18,Ne18)40Ar at 15 AMeV. Results compared data measured LNS NUMEN Collaboration. Formal...
The $^{11}$Be halo nucleus has been studied using different deformed two-body models, the Nilsson model and semi-microscopic PAMD model. Electric transition probabilities have calculated with both models found to be compatible those extracted from Coulomb dissociation data. $B(E1)$ $B(E2)$ are applied calculation of $^{11}$Be+$^{208}$Pb cross section. Both reproduce reasonably well experimental It is also shown that quadrupole resonances relevant for this agreement, being more accurate in...
The phenomenon of core excitation in the breakup a two-body halo nucleus is investigated. We show that this effect plays significant role reaction dynamics and, furthermore, its interference with valence mechanism has sizable and measurable effects on angular distributions. These have been studied resonant $^{11}\mathrm{Be}$ carbon target, populating resonances at 1.78 MeV ($5/{2}^{+}$) 3.41 ($3/{2}^{+}$). calculations performed using recent extension distorted-wave Born approximation...
Background: Double charge exchange (DCE) nuclear reactions have recently attracted much interest as tools to provide experimentally driven information about matrix elements of in the context neutrinoless double-$\ensuremath{\beta}$ decay. In this framework, a good description reaction mechanism and complete knowledge initial final-state interactions are mandatory. Presently, not enough is known details optical potentials response isospin operators for many projectile-target systems proposed...
The energy and angular distributions of $^{3}\mathrm{He}$ $^{4}\mathrm{He}$ ions produced in the $^{7}\mathrm{Be}\phantom{\rule{4pt}{0ex}}+\phantom{\rule{4pt}{0ex}}^{58}\mathrm{Ni}$ reaction at a bombarding 22 MeV have been measured for first time. yield heavier helium isotope was four to five times more abundant than that its lighter counterpart, ruling out possibility this range $^{7}\mathrm{Be}$ dynamics is dominated by exclusive breakup process...
Background: Nucleon transfer reactions are selective tools for nuclear physics investigations. The theoretical and computational limits affecting in the past their data analysis could be nowadays surmounted thanks to advent of methods with refined approximations constraints, even when heavy-ion collisions considered.Purpose: Modern microscopic calculations heavy-ion-induced combined precise experimental offer chance accurately testing different reaction models as well structure description...
We present a detailed analysis of the elastic scattering and breakup channel for reaction $^{11}\mathrm{Li}$ on $^{208}\mathrm{Pb}$ at incident laboratory energies 24.3 29.8 MeV, measured radioactive ion beam facility TRIUMF, in Vancouver, Canada. A large yield $^{9}\mathrm{Li}$ fragments was detected by four charged particle telescopes wide angular range. The experimental energy distributions these have been compared to coupled-reaction-channel continuum-discretized coupled-channel...
The quantum description of a particle moving in deformed potential is investigated. A pseudostate (PS) basis used to represent the states composite system. This PS obtained by diagonalizing system Hamiltonian family square integrable functions. In this work Transformed Harmonic Oscillator (THO) functions, from solutions using Local Scale Transformation (LST), are used. proposed method applied 11Be nucleus, treated two-body model (10Be+n). Both structure and reaction observables have been...
A measurement of proton inelastic scattering 8He at 8.25A MeV TRIUMF shows a resonance 3.54(6) with width 0.89(11) MeV. The energy the state is in good agreement coupled cluster and no-core shell model continuum calculations, latter successfully describing measured as well. Its differential cross section analyzed phenomenological collective excitation form factor microscopic reaction channels framework consistently reveals large deformation parameter β2 = 0.40(3), consistent predictions...
The theory of heavy ion double charge exchange (DCE) reactions A ( Z , N ) → ± 2, ∓ 2) is recapitulated emphasizing the role Double Single Charge Exchange (DSCE) and pion-nucleon Majorana DCE (MDCE) reactions. DSCE are second–order distorted wave character, mediated by isovector nucleon-nucleon (NN) interactions. response functions resemble nuclear matrix elements (NME) 2ν2β decay. MDCE process proceeds a dynamically generated effective rank-2 isotensor interaction, defined off–shell...
The ability of a recently developed square-integrable discrete basis to represent the properties continuum two-body system is investigated. obtained performing simple analytic local scale transformation harmonic oscillator basis. Scattering phase-shifts and electric transition probabilities $B(E1)$ $B(E2)$ have been evaluated for several potentials using proposed Both quantities are found be in excellent agreement with exact values calculated from true scattering states. has applied describe...
We investigate the selectivity of different two-particle transfer reactions [($t,p$), ($^{18}\mathrm{O}$,$^{16}\mathrm{O}$), and ($^{14}\mathrm{C}$,$^{12}\mathrm{C}$)] with respect to detailed microscopic configuration in initial final target states. In particular relative magnitude cross sections associated processes which pair is transferred pure single-particle orbitals depends on specific reaction its kinematical conditions. As a consequence also enhancement factors due pairing...
A novel method to extract the $B(E1)$ strength of a weakly bound nucleus from experimental Coulomb dissociation data is proposed. The makes use continuum discretized coupled channels (CDCC) calculations, in which both nuclear and forces are taken into account all orders. This crucial advantage with respect standard procedure based on Equivalent Photon Method (EPM) does not properly take distortion, higher order coupling effects, or Coulomb-nuclear interference terms. applied $^{11}$Be using...
The resonant breakup of $^{19}\mathrm{C}$ on protons measured at RIKEN [Y. Satou et al., Phys. Lett. B 660, 320 (2008)] is analyzed in terms a valence-core model for that includes possible core excitations. analysis the angular distribution prominent peak appearing relative-energy spectrum could be well described with this and consistent previous assignment $5/{2}^{+}$ state. Inclusion core-excitation effects are found to essential giving correct magnitude cross section By contrast,...
This work aims at investigating the projectile binding energy influence on reaction dynamics, introducing new results and data analysis methods in order to overcome some typically encountered problems, such as identification of products differing by few mass units discrimination direct processes. The $^{17}\mathrm{O}+^{58}\mathrm{Ni}$ collision was studied five near-barrier energies employing a compact experimental setup consisting four double-sided silicon strip detectors (DSSSDs)....
One-neutron halo nuclei, composed of a weakly bound particle coupled to core nucleus, are studied within particle-plus-core model. A semi-microscopic method generate the two-body Hamiltonian such system, including excitation, is proposed. The consists generating spin-independent part valence-core interaction using single-folding procedure, convoluting realistic nucleon-nucleon (NN) with transition densities. latter calculated antisymetrized molecular dynamics (AMD) method. prescription...