Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Rodríguez-Sànchez, J. L.; David, Jean‐Christophe; Hirtz, Jason; Kelić-Heil, A.; Leray, S.

doi:10.1103/physrevc.105.014623

Cited by 14 publications

(6 citation statements)

References 155 publications

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“…Thus, a description of fission as a diffusion process was proposed. The experimental data from this work are compatible with the theoretical preditions by INCL+ABLA [16,17] (solid line). This calculation describes the reaction and the following de-excitation processes as fission, by using a dynamical description based on the Fokker-Planck equation.…”

Section: Resultssupporting

confidence: 84%

Fission studies in inverse kinematics with the R³B setup

Graña-González,

Rodríguez-Sánchez,

Benlliure

et al. 2023

EPJ Web of Conf.

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Nuclear fission is a complex dynamical process, whose description involves the coupling between intrinsic and collective degrees of freedom, as well as different quantum-mechanical phenomena. For this reason, to this day it still lacks a satisfactory and complete microscopic description. In addition to the importance of describing fission itself, studies of the r-process in astrophysics depend on fission observables to constrain the theoretical models that explain the isotopic abundances in the Universe. To improve on the existing data, fission reactions of heavy nuclei in inverse kinematics are produced in quasi-free (p,2p) scattering reactions, which induce fission through particle-hole excitations that can range from few to tens of MeV. In order to study the evolution of the fission yields with temperature, the excitation energy of the fissioning system must be reconstructed, which is possible by measuring the four-momenta of the two outgoing protons. Performing this kind of experiment requires a complex experimental setup, providing full isotopic identification of both fission fragments and an accurate measurement of the momenta of the two outgoing protons. This was realized recently at the GSI/FAIR facility and some of the results obtained for the charge distributions are presented in this work.

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Section: Resultssupporting

confidence: 84%

Fission studies in inverse kinematics with the R³B setup

Graña-González,

Rodríguez-Sánchez,

Benlliure

et al. 2023

EPJ Web of Conf.

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“…When comparing the results with model calculations, for the two light targets, the INCL (Liège Intranuclear Cascade) model [13,14] is used, whereas for Pb the calculation is performed using ABRABLA07 [15]. In general, it can be seen that the obtained experimental production cross sections follow the same trend as the calculated ones.…”

Section: Resultsmentioning

confidence: 78%

Study of multinucleon knockout reactions of exotic nuclei in the region of Sn

Feijoo-Fontán,

Kudaibergenova,

Liblar

et al. 2023

EPJ Web of Conf.

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The experimental data collected during the S515 experiment performed by the R3B collaboration at GSI/FAIR represent a great opportunity to investigate nucleon knockout reactions of exotic nuclei in the region of Sn using complete kinematics measurements. These cross sections can be used in the future to investigate the quenching in the knockout of the minority species (neutrons or protons) in nuclei far from stability. Some of the arguments put forward are the underestimation of the knockout of deeply bound nucleons, final state interactions or the role of short-range correlations (SRC). Recently, several works based on inclusive measurements have shown that these SRCs could reduce the single nucleon knockout cross sections by around 50%, depending on the neutron excess (N/Z) of the initial projectile. The S515 data can help us to go further in this investigation because it allows to correlate the knockout cross sections of one, two or more nucleons with the number of protons and neutrons emitted from the target and which can be detected by the CALIFA and NeuLAND detectors, respectively, and perform complete kinematical studies on the nature of the event (SRC, evaporation, emission of clusters, final-state interactions...). Here the results obtained for the charge distribution of reaction residues are presented, which is one of the first steps of the still on-going analysis.

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“…This measurement will allow to correlate the fission yields with the excitation energy of the fissioning compound nucleus and to study the energy sharing between the nascent fission fragments. Here the main ideas and observables are presented from a theoretical point of view with calculations based on the coupling of INCL+ABLA models [40] to illustrate the capabilities of QFS reactions for fission studies. Future fission experiments using the Super-FRS fragment separator [45] together with the R 3 B setup [29] will permit to use this methodology to investigate the fission decay of exotic neutron-deficient and neutron-rich heavy nuclei, providing new data like fission yields and fission barrier heights for improving the predictions of reaction models and astrophysical r-process calculations [11].…”

Section: Discussionmentioning

confidence: 99%

“…Figs. 2(a) and 2(b) show an example of the proton polar angle correlation for single-proton knockout reactions inducing fission of 238 U nuclei in inverse kinematics at 560 MeV/u, calculated with the Liège intranuclear cascade model INCL coupled to the deexcitation code ABLA [40]. The two outgoing protons are mostly emitted in the reaction plane for quasi-free (p,2p) reactions with opening angles (θ 1 + θ 2 ) of around 80º, whereas multi-scattering reactions in which some neutrons are also knocked out as well as inelastic collisions exciting baryonic resonances like the ∆(1232) contribute to smaller opening angles (blue histogram).…”

Section: Qfs-induced Fissionmentioning

confidence: 99%

Complete kinematics studies of fission reactions induced by quasi-free nucleon scattering collisions

Rodríguez-Sánchez

2024

EPJ Web Conf.

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Measurements of spallation, fragmentation and Coulomb-induced fission reactions in inverse kinematics have provided valuable data in the last decades to accurately investigate the fission dynamics and nuclear structure at large deformations of a large variety of stable and non-stable heavy nuclei. To go further, quasi-free scattering (QFS) reactions in inverse kinematics are proposed as a new surrogate method to induce fission, which allows to reconstruct the excitation energy of compound fissioning systems by using the four-momenta of the two outgoing nucleons. This new approach would permit therefore to correlate the excitation energy with the charge and mass distributions of the fission fragments and with the fission probabilities, given for the first time direct access to the simultaneous measurement of the fission yield dependence on temperature and fission barrier heights of exotic heavy nuclei, respectively. The first experiment based on this approach was recently performed at the GSI/FAIR facility and a description of the methodology based on model calculations is given here.

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Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Cited by 14 publications

References 155 publications

Fission studies in inverse kinematics with the R³B setup

Fission studies in inverse kinematics with the R³B setup

Study of multinucleon knockout reactions of exotic nuclei in the region of Sn

Complete kinematics studies of fission reactions induced by quasi-free nucleon scattering collisions

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Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Cited by 14 publications

References 155 publications

Fission studies in inverse kinematics with the R3B setup

Fission studies in inverse kinematics with the R3B setup

Study of multinucleon knockout reactions of exotic nuclei in the region of Sn

Complete kinematics studies of fission reactions induced by quasi-free nucleon scattering collisions

Contact Info

Product

Resources

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Fission studies in inverse kinematics with the R³B setup

Fission studies in inverse kinematics with the R³B setup