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November 27, 2014 (v1)PublicationDescripción del continuo en una base discreta: estructura del núcleo 6He y las reacciones que induceUploaded on: March 27, 2023
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July 29, 2020 (v1)Publication
The four-body continuum-discretized coupled-channels approach using a continuum-bins scheme of discretization for three-body projectiles, that has been recently developed, is presented. The formalism is discussed and applied to reactions induced by the Borromean nucleus 6He on different targets (27Al, 64Zn, 120Sn, and 208Pb), with special...
Uploaded on: March 27, 2023 -
March 18, 2019 (v1)Publication
We investigate low-energy Be9 elastic scattering on two different targets (heavy, light) within a four-body framework using the continuum-discretized coupled-channels (CDCC) method. The Be9 projectile is described in an α+α+n three-body model using the analytical transformed harmonic oscillator (THO) basis in hyperspherical coordinates. We show...
Uploaded on: March 27, 2023 -
November 29, 2016 (v1)Publication
The scattering of 9Be on 208Pb is addressed within a four-body Continuum-Discretized Coupled-Channels (CDCC) framework, considering a three-body α + α + n projectile plus a structureless target. The projectile states are generated using the analytical Transformed Harmonic Oscillator (THO) basis in hyperspherical coordinates. Both the elastic...
Uploaded on: December 4, 2022 -
September 5, 2017 (v1)Publication
We investigate the elastic scattering of 9Be on 208Pb at beam energies above (50MeV) and below (40MeV) the Coulomb barrier. The reaction is described within a four-body framework using the Continuum-Discretized Coupled-Channels (CDCC) method. The 9Be projectile states are generated using the analytical Transformed Harmonic Oscillator (THO)...
Uploaded on: December 4, 2022 -
September 8, 2017 (v1)Publication
Recently, a square-integrable discrete basis, obtained performing a simple analytical local scale transformation to the harmonic oscillator basis, has been proposed and successfully applied to study the properties of two-body systems. Here, the method is generalized to study three-body systems. To test the goodness of the formalism and...
Uploaded on: March 27, 2023 -
September 5, 2017 (v1)Publication
The analytic THO method [1] is generalized to study three-body nuclei of astrophysical interest, and applied to 6He. Results are consistent with previous publications and experimental data [2, 3].
Uploaded on: December 4, 2022 -
July 12, 2017 (v1)Publication
The problem of describing resonances when the continuum is represented by a discrete set of normalizable states is addressed. In particular, here the description of resonances in a transformed harmonic oscillator basis is presented. A method to disentangle the resonances from the nonresonant continuum is proposed. The Ginocchio...
Uploaded on: March 27, 2023 -
July 10, 2017 (v1)Publication
Benchmark calculations are performed aiming to test the use of two different pseudostate bases on the multiple scattering expansion of the total transition amplitude scattering framework. Calculated differential cross sections for p-6 He inelastic scattering at 717 MeV/nucleon show a good agreement between the observables calculated in the two...
Uploaded on: March 27, 2023 -
March 22, 2022 (v1)Publication
A quantum phase transition (QPT) in a simple model that describes the coexistence of atoms and diatomic molecules is studied. The model, which is briefly discussed, presents a second-order ground state phase transition in the thermodynamic (or large particle number) limit, changing from a molecular condensate in one phase to an equilibrium of...
Uploaded on: March 25, 2023 -
April 3, 2017 (v1)Publication
The structure of the Borromean nucleus 9Be (α+α+n) is addressed within a three-body approach using the analytical transformed harmonic oscillator method. The three-body formalism provides an accurate description of the radiative capture reaction rate for the entire temperature range relevant in astrophysics. At high temperatures, results match...
Uploaded on: December 5, 2022 -
September 5, 2017 (v1)Publication
A relationship between the Coulomb inclusive break-up probability and the radiative capture reaction rate for weakly bound three-body systems is established. This direct link provides a robust procedure to estimate the reaction rate for nuclei of astrophysical interest by measuring inclusive break-up processes at different energies and angles....
Uploaded on: March 27, 2023 -
March 14, 2019 (v1)Publication
Radiative capture reaction rates for 6He, 9Be and 17Ne formation at astrophysical conditions are studied within a three-body model using the analytical transformed harmonic oscillator method to calculate their states. An alternative procedure to estimate these rates from experimental data on low-energy breakup is also discussed.
Uploaded on: December 4, 2022 -
January 31, 2023 (v1)Publication
Parfenova et al. state in [Phys. Rev. C 98, 034608 (2018)2469-998510.1103/PhysRevC.98.034608] that the results presented by Casal et al. [Phys. Rev. C 94, 054622 (2016)2469-998510.1103/PhysRevC.94.054622] concerning the radiative capture for Ne17 formation are incorrect and their conclusions erroneous mainly because of two reasons: (1) it is...
Uploaded on: March 1, 2023 -
September 8, 2017 (v1)Publication
The elastic and α-production channels for the 6He+208Pb reaction are investigated at energies around the Coulomb barrier (Elab=14, 16, 18, 22, and 27 MeV). The effect of the two-neutron transfer channels on the elastic scattering has been studied within the Coupled-Reaction-Channels (CRC) method. We find that the explicit inclusion of these...
Uploaded on: March 27, 2023 -
November 29, 2016 (v1)Publication
We present some recent applications of the Continuum-Discretized Coupled-Channels (CDCC) and Coupled-Reaction-Channels (CRC) methods to the study of reactions induced by weakly-bound nuclei on stable targets. The methods are applied to the scattering of the Borromean nucleus 6He at energies around the Coulomb barrier. Elastic scattering data...
Uploaded on: December 4, 2022 -
October 30, 2017 (v1)Publication
We present an Optical Model (OM) study of 6He on 208Pb elastic scattering data, measured at laboratory energies around the Coulomb barrier (Elab=14, 16, 18, 22, and 27 MeV) [1]. For the projectile-target bare interaction, we use the microscopic São Paulo Potential (SPP). This bare interaction is supplemented with a Coulomb Dipole Polarization...
Uploaded on: March 27, 2023 -
April 19, 2017 (v1)Publication
The resonant breakup of 19C on a proton target at 70 MeV/nucleon is analyzed using Faddeev-Alt, Grassberger, Sandhas (Faddeev-AGS) and continuum-discretized coupled-channels (CDCC) reaction frameworks, where in both cases a three-body model (18C+n+p) for the reaction is considered. Taking a 18C + p potential from a global nucleon-nucleus...
Uploaded on: December 4, 2022 -
April 3, 2017 (v1)Publication
Background: The breakout from the hot Carbon-Nitrogen-Oxigen (CNO) cycles can trigger the rp-process in type I x-ray bursts. In this environment, a competition between 15O(α,γ )19Ne and the two-proton capture reaction 15O(2p,γ )17Ne is expected. Purpose: Determine the three-body radiative capture reaction rate for 17Ne formation including...
Uploaded on: December 4, 2022 -
April 28, 2017 (v1)Publication
The structure of the three-body Borromean nucleus He6 is approximated by a two-body di-neutron cluster model. The binding energy of the 2n-α system is determined to obtain a correct description of the 2n-α coordinate, as given by a realistic three-body model calculation. The model is applied to describe the breakup effects in elastic scattering...
Uploaded on: March 27, 2023 -
April 2, 2019 (v1)Publication
The continuum coupling in a one-dimensional scattering problem was studied within a semiclassical approach by means of a transformed harmonic oscillator (THO). The THO basis provided a finite set of normalized states representing the continuum of breakup states. The calculated wave functions were used to evaluate diagonal and transition...
Uploaded on: March 27, 2023 -
November 29, 2016 (v1)Publication
Experimental cross sections for the 6He+120Sn are analysed. Elastic scattering angular distributions and alpha particle production cross sections have been measured and are compared with the total reaction cross sections
Uploaded on: March 27, 2023