Article
Physics, Nuclear
Jian-Mei Yang, Wei-Juan Zhao, Bing Wang
Summary: The dynamic effects on fusion cross sections for O-16, O-18 + Sn-112, Sn-116, Sn-118, Sn-124 have been investigated. The study reveals that the sub-barrier fusion cross sections of different reactions exhibit varying degrees of enhancement.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Nuclear
Xiang-Xiang Sun, Lu Guo
Summary: We conducted a microscopic study on the fusion reactions 14,15C + 232Th, focusing on the influence of deformed halo structure on reaction dynamics using the time-dependent density functional theory. By obtaining internuclear potentials through the density-constraint frozen Hartree-Fock approach, we calculated the fusion cross sections of 14,15C + 232Th considering all orientations of deformed reactants. Our calculations successfully reproduced the enhancement of fusion cross sections at sub-barrier energies and provided insights into the underlying mechanism driven by the deformed halo structure of 15C. Additionally, we found that the one-neutron transfer probabilities were more sensitive to the orientations of 15C than 232Th, indicating the notable effects of halo structure on the reaction dynamics.
Article
Physics, Nuclear
J. L. Ferreira, J. Rangel, J. Lubian, L. F. Canto
Summary: This study investigates fusion reactions in collisions of neutron-halo projectiles with heavy targets. The research finds that fusion cross sections are suppressed above the Coulomb barrier and enhanced below it. Furthermore, the deviations from predictions of the barrier penetration model depend on the breakup threshold of the projectile.
Article
Neurosciences
Sophia Robert, Leslie G. Ungerleider, Maryam Vaziri-Pashkam
Summary: Humans can accurately and quickly classify objects in visual scenes using static images, but motion can also be used as a cue for object classification. In this study, we used a novel stimulus set of object kinematograms to isolate motion-defined signals and investigate how they are processed by the brain. Our results show that motion cues can elicit robust category responses in various brain regions, even in regions traditionally associated with static image processing.
JOURNAL OF NEUROSCIENCE
(2023)
Article
Physics, Nuclear
J. Kuehtreiber, P. Hille, O. Forstner, H. Friedmann, A. Pavlik, A. Priller
Summary: The reactions of Li-6, Li-7+Al-27 were compared to O-17, O-18+O-16 reactions forming the same compound nuclei S-33, S-34. It was found that weakly bound projectiles Li-6, Li-7 undergo both fusion and breakup reactions, in contrast to tightly bound projectiles O-18 and O-17. Direct reactions below the Coulomb barrier play a significant role in competition with complete fusion.
Article
Physics, Nuclear
J. K. L. Chaves, L. R. Gasques, L. C. Chamon, V. Scarduelli, A. Lepine-Szily, W. A. Y. Hatano, V. A. B. Zagatto
Summary: This study investigates nuclear reaction mechanisms for systems involving weakly bound projectiles through coupled reaction channels calculations and measurement of angular distributions. The theoretical calculations show good agreement with the experimental data.
Article
Physics, Nuclear
Yan Li, D. Y. Pang
Summary: The study analyzed the effects of breakup reactions of Be-11 with a Pb-208 target on the elastic scattering angular distributions, revealing a suppression of the Coulomb-nuclear interference peaks. The weighted mean local polarization potentials obtained from continuum discretized coupled channel calculations were found to mimic the dynamic polarization potentials induced by the breakup coupling effects. Comparisons between the weighted mean local polarization potentials and the theoretically calculated Coulomb dipole polarization potentials suggested that the breakup coupling effect of the Be-11+Pb-208 system cannot be fully represented by the Coulomb dipole polarization potentials alone.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
Saikat Bhattacharjee, Piyasi Biswas, Ashish Gupta, M. K. Pradhan, N. Deshmukh, P. Basu, V. V. Parkar, S. Santra, K. Ramachandran, A. Chatterjee, Subinit Roy, A. Mukherjee
Summary: This study measured the elastic-scattering angular distribution of the weakly bound nucleus 6Li on the deformed rare-earth 159Tb target nucleus at energies near the Coulomb barrier. The elastic-scattering cross sections were found to consist primarily of inelastic contributions from low-lying excited states of 159Tb. Pure elastic cross sections were extracted from the admixture of elastic and inelastic data. The optical model potential parameters for the system were obtained from the extracted pure elastic-scattering cross sections, and coupled-channel calculations were used to compare the theoretical and experimental inelastic-scattering cross sections. Additionally, the spectroscopic factor for the 158Tb+n configuration was obtained from experimental 1n-pickup data.
Article
Chemistry, Multidisciplinary
Zhitao Feng, Dean J. Tantillo
Summary: Carbocation rearrangement reactions are significant for synthetic and biosynthetic chemistry. Nonstatistical dynamic effects were found to play a crucial role in migratory aptitude.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
C. A. Bertulani
Summary: A model is proposed to calculate projectile core destruction in knockout reactions. Secondary collisions between incoming and struck nucleons are found to decrease the core survival probability, but there is no clear evidence for a reduction in cross section with increasing binding energy of the removed nucleon.
Article
Energy & Fuels
Dimiter Alexandrov
Summary: Replicable experimental results on low-energy nuclear fusion reactions demonstrate that helium (including He-3 and He-4 isotopes) can be synthesized through the interaction of deuterium nuclei with solids in the experimental system. The concentration of generated helium is found to increase with both the kinetic energy of the interacting deuterium nuclei and the temperature of the sample holder.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Mechanics
Yan Pang, Yao Lu, Xiang Wang, Zhaomiao Liu
Summary: The study found that in a rectangular microchannel with a T-junction, droplet behavior can be categorized into three modes: flow into the side branch, split at the junction, and flow into the downstream channel. The size of the droplet and flow conditions affect the changes in flow rate ratio and pressure difference.
Article
Physics, Nuclear
B. Mukeru
Summary: The study examines the proton-halo breakup behavior in the limit of ε(0) -> 0 and its impact on the Coulomb barrier between the core and the proton. It is observed that the elastic scattering cross section has negligible dependence on the binding energy, while the total, Coulomb and nuclear breakup cross sections increase significantly as ε(0) decreases towards 0.
Article
Physics, Particles & Fields
Piotr Bargiela, Federico Buccioni, Fabrizio Caola, Federica Devoto, Andreas von Manteuffel, Lorenzo Tancredi
Summary: In this paper, we investigate signal-background interference effects in Higgs-mediated diphoton production at the LHC. After reviewing previous studies, we provide predictions beyond NLO accuracy for the interference and related observables. We also study the impact of QCD radiative corrections on the determination of the Higgs boson width.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Chemistry, Physical
Seonghyeon Kim, Woosung Cho, Jeonghyeon Hwang, Joonwon Kim
Summary: As IoT devices with pressure sensors become more popular, the need for reducing their power consumption has increased. This study introduces a self-powered pressure sensor (SPS) that can measure both static and dynamic stimuli without an external power source. The SPS utilizes an electrochemical reaction and consists of electrodes and a functional sponge with an electrolyte. It demonstrates high sensitivity (10 kPa(-1)) and a wide dynamic range (up to 110 kPa), making it suitable for various applications such as safety alarms and robotic control.
Article
Physics, Nuclear
L. C. Chamon, L. R. Gasques, J. C. Zamora
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2020)
Article
Computer Science, Interdisciplinary Applications
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)
Article
Physics, Nuclear
L. C. Chamon, L. R. Gasques, J. C. Zamora
Summary: The real part of the optical potential obtained from elastic scattering data analyses within the optical model approach exhibits significant energy-dependence. Previous studies have suggested that this dependence may arise from couplings to inelastic states of the nuclei. This paper presents extensive data analyses for the elastic scattering and inelastic excitation of 111 states of Pb-208 in the He-4 + Pb-208 system, in order to further investigate this phenomenon.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Physics, Nuclear
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.
Article
Physics, Nuclear
L. R. Gasques, L. C. Chamon, A. Lepine-Szily, V Scarduelli, V. A. B. Zagatto, D. Abriola, A. Arazi, M. A. Cardona, E. de Barbara, J. de Jesus, D. Hojman, G. Marti, A. J. Pacheco, D. Ramos Lopez, M. A. G. Alvarez, J. P. Fernandez-Garcia, M. Rodriguez-Gallardo, M. Cubero, L. F. Umana, S. Achi-Prado
Article
Physics, Nuclear
M. Aversa, D. Abriola, M. A. G. Alvarez, A. Arazi, M. A. Cardona, L. C. Chamon, E. de Barbara, J. de Jesus, J. P. Fernandez-Garcia, L. R. Gasques, D. Hojman, A. Lepine-Szily, G. Marti, A. J. Pacheco, V Scarduelli, V. A. B. Zagatto
Article
Physics, Nuclear
L. C. Chamon, L. R. Gasques, B. Carlson
Article
Physics, Nuclear
R. Linares, C. C. Seabra, V. A. B. Zagatto, V. Scarduelli, L. Gasques, L. C. Chamon, B. R. Goncalves, D. R. Mendes Junior, A. Lepine-Szily
Article
Physics, Nuclear
E. Crema, B. Paes, V. A. B. Zagatto, J. F. P. Huiza, J. Lubian, J. M. B. Shorto, R. F. Simoes, D. S. Monteiro, N. Added, M. C. Morals, P. R. S. Gomes
Article
Physics, Nuclear
V. A. B. Zagatto, E. Crema, J. M. B. Shorto, M. C. Morais, J. Lubian, N. Added, R. F. Simoes, D. S. Monteiro, J. F. P. Huiza, B. Paes, P. R. S. Gomes
Article
Physics, Nuclear
E. O. N. Zevallos, V Guimaraes, E. N. Cardozo, J. Lubian, R. Linares, R. Lichtenthaler Filho, K. C. C. Pires, O. C. B. Santos, S. Appannababu, E. Crema, J. Alcantara-Nunez, A. L. Lara, Y. S. Villamizar, U. Umbelino, N. Added, M. Assuncao, V Morcelle, D. S. Monteiro
Article
Physics, Nuclear
E. Crema, V. A. B. Zagatto, J. M. B. Shorto, B. Paes, J. Lubian, R. F. Simoes, D. S. Monteiro, J. F. P. Huiza, N. Added, M. C. Morais, P. R. S. Gomes
Article
Physics, Nuclear
E. Crema, V. A. B. Zagatto, J. M. B. Shorto, B. Paes, J. Lubian, R. F. Simoes, D. S. Monteiro, J. F. P. Huiza, N. Added, M. C. Morais, P. R. S. Gomes
Article
Physics, Nuclear
M. A. G. Alvarez, M. Rodriguez-Gallardo, L. R. Gasques, L. C. Chamon, J. R. B. Oliveira, V Scarduelli, A. S. Freitas, E. S. Rossi Jr, V. A. B. Zagatto, J. Rangel, J. Lubian, I Padron
Article
Physics, Nuclear
L. R. Gasques, A. S. Freitas, L. C. Chamon, J. R. B. Oliveira, N. H. Medina, V. Scarduelli, E. S. Rossi, M. A. G. Alvarez, V. A. B. Zagatto, J. Lubian, G. P. A. Nobre, I. Padron, B. V. Carlson
