☆ 4.1 Article

Inclusive Proton Emission Spectra from Deuteron Breakup Reactions

FEW-BODY SYSTEMS (2016)

Journal

FEW-BODY SYSTEMS

Volume 57, Issue 5, Pages 307-314

Publisher

SPRINGER WIEN

DOI: 10.1007/s00601-016-1054-8

Keywords

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Categories

Physics, Multidisciplinary

Funding

FAPESP [2009/00069-5]
CNPq [306692/2013-9]
International Atomic Energy Agency [17740]
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/00069-5] Funding Source: FAPESP

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Abstract

We present calculations of deuteron elastic and nonelastic breakup cross sections and angular distributions at deuteron energies below 100 MeV obtained using the post-form DWBA approximation. The elastic breakup cross section was extensively studied in the past. Very few calculations of nonelastic breakup have been performed, however. We compare two forms of the elastic DWBA breakup amplitude but conclude that neither provides a correct description of the inclusive proton emission cross section.

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Summary: The isotopic shift in the charge radii of even-even isotopes of Sn and Pb nuclei at N = 82 and 126 were revisited using the RMF and RHB approaches, as well as the shell model. The correlation between single-particle levels filling and isotopic shift in occupation probabilities was established. The obtained results from RMF, RHB, and shell model calculations were in line with experimental data, especially for the Pb isotopic chains beyond N=126.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2021)

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Article Computer Science, Interdisciplinary Applications

Sao Paulo potential version 2 (SPP2) and Brazilian nuclear potential (BNP)

L. C. Chamon, B. Carlson, L. R. Gasques

Summary: The REGINA code calculates nuclear potentials based on the Sao Paulo potential version 2 (SPP2) and the Brazilian nuclear potential (BNP), using nuclear densities from the Dirac-Hartree-Bogoliubov model. Elastic scattering cross sections are obtained within the optical model framework. The code also integrates the Schrodinger equation with a complex optical potential to obtain S-matrix and elastic scattering cross sections for a given system and energy, with a maximum supported angular momentum of 2000.

COMPUTER PHYSICS COMMUNICATIONS (2021)

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Article Chemistry, Analytical

Upgrade of recommended nuclear cross section data base for production of therapeutic radionuclides

F. Tarkanyi, A. Hermanne, A. Ignatyuk, S. Takacs, R. Capote

Summary: The IAEA Nuclear Data Section has established a database for recommended cross sections and nuclear decay data important for medical radionuclide production. Updated evaluations with uncertainty quantification for 25 reactions relevant for the production of therapeutic radioisotopes are provided.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY (2022)

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Article Physics, Nuclear

A systematic analysis of deuteron breakup

F. Torabi, B. Carlson

Summary: In this study, inclusive breakup cross sections for deuterons incident on a wide range of nuclei at different energies were investigated. The elastic and nonelastic breakup cross sections were calculated using the post-form distorted-wave-Born approximation (DWBA). Exciton and statistical compound-nucleus model cross sections were also calculated to account for pre-equilibrium and equilibrium emissions. The results were compared to experimental data, showing good agreement for the integrated cross sections but discrepancies for the double differential neutron and proton cross sections, especially for heavier targets. Possible reasons for these disagreements were discussed.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS (2023)

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Article Physics, Multidisciplinary

Quantum trajectories and the nuclear optical model

N. A. Coleta da Conceicao, B. Carlson, B. Poirier

Summary: In this article, the effects of optical model absorption on incoming and outgoing scattering waves in nuclear scattering are examined using the bipolar reduction of the Schrodinger equation. The study compares the exact solutions obtained using a bipolar quantum trajectory-based formalism with their approximate WKB counterparts. The results show that absorption reduces the magnitudes of the incoming and outgoing waves and smoothens the variation of the potential at the turning point, resulting in reduced reflection in that region.

PHYSICA SCRIPTA (2023)

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Article Physics, Nuclear

Low-energy nuclear physics and global neutron star properties

Brett V. Carlson, Mariana Dutra, Odilon Lourenco, Jerome Margueron

Summary: In this study, the role of low-energy nuclear physics data in constraining neutron star global properties is examined. The capacity of 415 relativistic mean field and nonrelativistic Skyrme-type interactions to reproduce various nuclear properties is assessed. The correlation between symmetry energy and its slope is found, and estimates for symmetry energy and neutron star radius are obtained. The study shows that the reproduction of low-energy nuclear physics data has minimal impact on the global properties of neutron stars, and the experimental constraint on symmetry energy is the most effective for reducing uncertainties in neutron star matter.

PHYSICAL REVIEW C (2023)

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Article Physics, Nuclear

Inclusive breakup cross sections in reactions induced by the nuclides 6He and 6, 7Li in the two-body cluster model

L. A. Souza, E. Chimanski, B. Carlson

Summary: The study calculates the inclusive alpha particle production induced by He-6 and Li-6, Li-7 isotopes on different target nuclei, revealing a significant contribution from inclusive breakup emission. Li-6 and Li-7 reactions show a good description of the data, while interpreting the data involving He-6 remains more complicated.

PHYSICAL REVIEW C (2021)

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Article Physics, Nuclear

Modeling photon-induced reactions on 233-238U actinide targets

M. Sin, R. Capote, M. W. Herman, A. Trkov, B. Carlson

Summary: Comprehensive calculations of photon-induced reactions on U233-238 targets for incident photon energies from 3 up to 30 MeV are conducted using the statistical model code EMPIRE-3.2 Malta. The differences and similarities between models and parameters used in calculations of photon- and neutron-induced reactions on the same nuclei, focusing on fission, are discussed. The role of an extended optical model for fission, which includes partial damping in the continuum, in improving the description of the measured data is emphasized.

PHYSICAL REVIEW C (2021)

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Article Physics, Nuclear

Understanding the mechanisms of nuclear collisions: A complete study of the 10B+120Sn reaction

L. R. Gasques, M. A. G. Alvarez, A. Arazi, B. Carlson, L. C. Chamon, J. P. Fernandez-Garcia, A. Lepine-Szily, J. Lubian, J. Rangel, M. Rodriguez-Gallardo, V Scarduelli, V. A. B. Zagatto

Summary: The study focused on nuclear reaction mechanisms for systems involving weakly bound projectiles, analyzing angular distributions for various reaction processes and observing the presence of Be-10 nuclei. The effect of couplings to nonelastic states on angular distributions was discussed, and theoretical calculations showed good agreement with experimental data for inelastic, one-neutron stripping, one-proton pickup, one-deuteron pickup, and He-3 stripping transfer reactions. Further inclusion of additional channels may be necessary to improve the description of elastic scattering angular distribution.

PHYSICAL REVIEW C (2021)

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