Article
Multidisciplinary Sciences
L. Yang, C. J. Lin, H. Yamaguchi, A. M. Moro, N. R. Ma, D. X. Wang, K. J. Cook, M. Mazzocco, P. W. Wen, S. Hayakawa, J. S. Wang, Y. Y. Yang, G. L. Zhang, Z. Huang, A. Inoue, H. M. Jia, D. Kahl, A. Kim, M. S. Kwag, M. La Commara, G. M. Gu, S. Okamoto, C. Parascandolo, D. Pierroutsakou, H. Shimizu, H. H. Sun, M. L. Wang, F. Yang, F. P. Zhong
Summary: The correlations between the breakup fragments of B-8 incident on Sn-120 have been measured using a silicon detector array. The study finds that B-8 presents distinctive reaction dynamics with dominant elastic breakup, and the breakup occurs mainly via short-lived continuum states, indicating the effect of Coulomb polarization. The results also reveal that the prompt breakup mechanism dominates and occurs predominantly on the outgoing trajectory.
NATURE COMMUNICATIONS
(2022)
Article
Astronomy & Astrophysics
L. Yang, C. J. Lin, H. Yamaguchi, Jin Lei, P. W. Wen, M. Mazzocco, N. R. Ma, L. J. Sun, D. X. Wang, G. X. Zhang, K. Abe, S. M. Cha, K. Y. Chae, A. Diaz-Torres, J. L. Ferreira, S. Hayakawa, H. M. Jia, D. Kahl, A. Kim, M. S. Kwag, M. La Commara, R. Navarro Perez, C. Parascandolo, D. Pierroutsakou, J. Rangel, Y. Sakaguchi, C. Signorini, E. Strano, X. X. Xu, F. Yang, Y. Y. Yang, G. L. Zhang, F. P. Zhong, J. Lubian
Summary: This study provides comprehensive information on the reaction mechanisms of weakly bound nuclear systems by performing complete kinematics measurements, continuum-discretized coupled-channels calculations, and three-body model investigations for F-17 interacting with Ni-58 near the Coulomb barrier energies. Results show that non-elastic breakup is dominant, while incomplete fusion plays a minor role. Furthermore, the reaction and total fusion cross sections of F-17+Ni-58 exhibit enhancement in the sub-barrier energy region compared to O-16+Ni-58, mainly due to couplings to continuum states.
Article
Physics, Nuclear
E. M. Tursunov, S. A. Turakulov, A. S. Kadyrov, L. D. Blokhintsev
Summary: The study investigates the astrophysical Be-7(p, gamma)B-8 direct capture process within a two-body single-channel model with Gaussian potentials. A modified potential is developed to match new experimental values and known astrophysical S factor, showing consistency with previous theory. Results for the astrophysical S factor at intermediate energies are in good agreement with existing datasets.
Article
Physics, Nuclear
O. Sgouros, V. Soukeras, K. Palli, A. Pakou
Summary: Elastic scattering, total reaction, and fusion cross section measurements for Be-7 on light and heavy targets were studied at low energies. It was found that dispersion relations are not adequate for describing the potential or fusion for light targets, but the standard potential threshold anomaly and fusion enhancement were observed for heavy targets.
Article
Physics, Nuclear
V. V. Parkar, A. Parmar, M. Prasanna, V. Jha, S. Kailas
Summary: One-neutron stripping and pickup cross sections in the Li-6 + Sn-124 system were studied using coupled-channel calculations with a reliable global set of potentials. The systematics of one-neutron stripping and pickup cross sections with 6Li projectiles on several targets were presented. An approximate universal behavior was observed, which was explained by a model based on barrier penetration. The neutron transfer, along with the cumulative sum of complete and incomplete fusion, was found to account for most of the reaction cross section in the Li-6 + Sn-124 system.
Article
Engineering, Multidisciplinary
Maryam H. Abd Madhi, Fouad A. Majeed
Summary: In this study, calculations of total fusion reaction cross-section, fusion barrier distribution, and fusion probability were conducted for systems involving halo nuclei using a semiclassical approach. The results were compared with experimental data and quantum mechanics calculations, showing similar trends both below and above the Coulomb barrier.
BULLETIN OF THE POLISH ACADEMY OF SCIENCES-TECHNICAL SCIENCES
(2021)
Article
Physics, Multidisciplinary
Mohammed Anwar, Bodor El-Naggar, Kassem O. Behairy
Summary: The elastic scattering differential cross sections for B-8 + Ni-58 at different energies are analyzed using the optical double folding potential. The microscopic and semi-microscopic optical potentials are generated using density and energy-dependent CDM3Y6 effective nucleon-nucleon interaction and Sao-Paulo potential. Results show that the Sao-Paulo potential is more appropriate in reproducing the data compared to CDM3Y6. The study also discusses the relationship between the real and imaginary volume integrals with the reaction cross section.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Physics, Nuclear
Songju Lei, Songjie Li, Qing Zhao, Niu Wan, Mengjiao Lyu, Zhongzhou Ren, Hisashi Horiuchi, Gerd Roepke, Peter Schuck, Akihiro Tohsaki, Chang Xu, Bo Zhou
Summary: This study presents theoretical calculations on the ground state of B-8 using an extended THSR wave function. The results show that the ground state of B-8 can be accurately described by a superposition of two basis states. The study also demonstrates the properties of the proton halo in B-8 by calculating its radius and electric quadrupole moment.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Nuclear
Nguyen Le Anh, Bui Minh Loc
Summary: This paper simultaneously analyzes the electromagnetic dipole transitions in the 7Be(p, ?? ) 8B and 7Li(n, ?? ) 8Li reactions at the keV-energy region. The Skyrme Hartree-Fock potential model is used to calculate the transitions, and the electric dipole transitions are successfully described while the magnetic dipole transitions are analyzed in detail. The astrophysical S17(0) factor of the 7Be(p, ?? ) 8B reaction is found to be 22.3 eV b.
Article
Physics, Nuclear
Wendi Chen, D. Y. Pang, Hairui Guo, Ye Tao, Weili Sun, Yangjun Ying
Summary: Fusion reactions induced by weakly bound nucleus 6Li with various targets at energies around the Coulomb barrier were studied using a three-body model. The total fusion cross sections were calculated using the continuum-discretized coupled channels method, and the complete fusion cross sections were obtained through the sum-rule model. The results showed that (i) considering continuum states up to 40 MeV was necessary for accurate total fusion calculations, especially for light and medium mass targets; (ii) the converged results with continuum coupling were similar to the single-channel results above the Coulomb barrier energy; and (iii) continuum coupling strongly affected partial-wave fusion cross sections, and closed channels played a significant role in describing the complete fusion cross sections below the Coulomb barrier for the 6Li + 28Si, 59Co, and 144Sm systems.
Article
Physics, Nuclear
Yun Yang, Pei-Wei Wen, Cheng-Jian Lin, Hui-Ming Jia, Lei Yang, Nan-Ru Ma, Feng Yang, Tian-Peng Luo, Teng-Huan Mo, Chang Chang, Hai-Rui Duan, Ming-Hao Zhang, Zhi-Jie Huang, Cheng Yin
Summary: The reduced strong absorption distance and Coulomb barrier height are extracted from experimental elastic scattering angle distributions using the quarter-point recipe. The study shows that halo nuclei have significantly larger mean values compared to tightly and weakly bound nuclei. The linear relationship between reduced distance and system size can be used to estimate the Coulomb barrier radius, which is difficult to obtain from fusion reactions. The rule concerning the Coulomb parameter z is in agreement with other theoretical barrier laws, and the impact of binding energy or deformation on this relationship is clarified.
Article
Physics, Nuclear
Vijay, Rishi Pal Chahal, Manjeet Singh Gautam, Sukhvinder Duhan, Hitender Khatri
Summary: This study investigates the sensitivity of fusion cross sections and barrier distribution data to the choice of potential parameters in O-16 + Ge-70(,72,73,74,)76 and O-18 + Ge-74 reactions. It is found that the choice of potential parameters significantly affects fusion cross sections and barrier distribution. Coupling to nuclear structure degrees of freedom is necessary to reproduce experimental data accurately. The SAGBD model incorporating multidimensional nucleus-nucleus potential has shown good agreement with experimental data.
Article
Physics, Nuclear
A. C. Visakh, E. Prasad, P. V. Laveen, M. Shareef, A. Shamlath, S. Nath, N. Madhavan, J. Gehlot, Gonika, Rohan Biswas, A. Parihari, J. Khuyagbaatar, B. Lommel, B. Kindler, A. M. Vinodkumar, B. R. S. Babu, S. Sanila, K. M. Varier, S. Appannababu
Summary: The study reveals fusion enhancement at sub-barrier energies and hindrance at high energies in heavy ion fusion reactions. Coupled channels calculations successfully reproduce fusion cross sections, while collective excitations of the projectile nucleus do not contribute to the observed fusion enhancement.
Article
Physics, Multidisciplinary
Xue-Neng Cao, Ming Fu, Xian-Xian Zhou, Tai-Hua Heng, Jian-You Guo
Summary: The relativistic point-coupling model combined with complex momentum representation method is used to study exotic phenomena in the neutron-rich isotopes of Si, S, Ar, Ti, Cr, and Fe. The results show the disappearance of traditional magic numbers and the appearance of a new magic number N = 34. Furthermore, calculations suggest the possibility of a neutron halo in Ti, Cr, and Fe isotopes, and neutron skin formation in Si, S, and Ar isotopes. These predictions provide valuable references for experimental studies on the structure of halo and skin in these isotopes.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Nuclear
B. W. Asher, S. Almaraz-Calderon, Vandana Tripathi, K. W. Kemper, L. T. Baby, N. Gerken, E. Lopez-Saavedra, A. B. Morelock, J. F. Perello, I Wiedenhover, N. Keeley
Summary: The total fusion cross section for the F-17 + C-12 system near the top of the Coulomb barrier was studied, investigating the potential influences of the unique nuclear structure properties of the F-17 nucleus on the fusion process. The results show that these properties have minimal impact on the total fusion cross section.
Article
Optics
T. L. Belyaeva, M. A. Aguero, M. E. Maguina-Palma, V. N. Serkin
Summary: This study demonstrates the possibility of generalizing the Karpman and Solov'ev theory of interaction forces among solitons with an external potential as a small perturbation. By closely following the adiabatic perturbation algorithm proposed by Karpman and Solov'ev, analytical solutions are obtained to describe the dynamics of two solitons trapped in a harmonic oscillator potential. The research shows that the oscillation period of in-phase solitons decreases with increasing oscillator frequency and decreasing initial separation, while out-of-phase solitons can exist in states where they practically do not interact.
Article
Astronomy & Astrophysics
J. C. Zamora, V. Guimaraes, G. V. Rogachev, S. Ahn, J. Lubian, E. N. Cardozo, E. Aboud, M. Assuncao, M. Barbui, J. Bishop, A. Bosh, J. Hooker, C. Hunt, H. Jayatissa, E. Koshchiy, S. Lukyanov, R. O'Dwyer, Y. Penionzhkevich, B. T. Roeder, A. Saastamoinen, S. Upadhyayula
Summary: Direct measurements of total fusion cross section for B-8+Ar-40 were achieved using active target technique near Coulomb barrier, showing good agreement with coupled reaction channels calculation. Data compared with previous experiments on Si-28 and Ni-58 targets, exhibiting no significant enhancement near Coulomb barrier as reported for B-8+Ni-58 system. Current data systematically consistent with B-8+Si-28 results at higher energies and other weakly-bound systems near-barrier energies.
Article
Physics, Nuclear
Alla Demyanova, Viktar Starastsin, Alexey Ogloblin, Andrey Danilov, Sergey Dmitriev, Wladyslaw Trzaska, Pauli Heikkinen, Tatyana Belyaeva, Sergey Goncharov, Vladimir Maslov, Yuri Sobolev, Yury Gurov, Boris Chernyshev, Nassurlla Burtebaev, Daniyar Janseitov, Sergey Khlebnikov
Summary: A study of the B-11(He-3,d)C-12 reaction at a He-3 energy of 25 MeV was conducted at the University of Jyvaskyla in Finland. Differential cross sections were measured for different states in C-12 with excitation energies around 13.35 MeV and 20 MeV, and analyzed using the DWBA method. Tentative assignments for various states were given, with spin-parity and isospin values determined for the first time.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Engineering, Mechanical
T. L. Belyaeva, V. N. Serkin
Summary: In this work, we investigate the representation of external potentials in completely integrable higher-order nonautonomous nonlinear dynamical systems as an infinite power series with time-varying coefficients. The study introduces the generalized Hirota equation as an example, demonstrating the elastic interaction of accelerating and self-compressing nonautonomous solitons in various external potentials, based on conditions of exact integrability.
NONLINEAR DYNAMICS
(2022)
Article
Optics
T. L. Belyaeva, A. Mena-Contla, L. Morales-Lara, R. Pena-Moreno, V. N. Serkin
Summary: This research clarifies an analytical approach in the theory of modulational instability within the framework of the nonautonomous nonlinear Schrodinger equation. It reveals important analogies and distinctions between the higher-order induced modulational instability and the internal dynamics of higher-order N-soliton bound states. The study also demonstrates the crucial role of the sliding pump effect in the nonlinear stage of the higher-order induced modulational instability, leading to the soliton self-cleaning effect.
Article
Optics
T. L. Belyaeva, M. A. Aguero, V. N. Serkin
Summary: The introduced nonautonomous solitons in the nonautonomous nonlinear Schrodinger equation model can interact elastically under different external potentials and are only controlled under certain conditions; novel features arise due to the dependence between soliton amplitudes and velocities, such as the decay of soliton bound states.
Article
Optics
M. A. Aguero, T. L. Belyaeva, M. Perez-Maldonado, L. Morales-Lara, R. Pena-Moreno, V. N. Serkin
Summary: The main objective of our study is to reveal the role of cubic-quintic nonlinearity in the dynamics of induced modulational instability in nonautonomous nonlinear optical systems with dispersion and nonlinearity varying along the propagation distance. Analytical methods are used to obtain the criterion of modulational instability in the cubic-quintic nonautonomous systems. The nonlinear stage of modulational instability is studied through direct computational modeling. The main results of our computer experiments clearly demonstrate imperfect spectral energy restoration, leading to variations in the Fermi-Pasta-Ulam recurrence periods, and emphasize the significance of compensating both the quintic nonlinearity and changing dispersion to suppress the appearance of rogue waves.
Article
Optics
M. A. Aguero, T. L. Belyaeva, G. Corro, R. Pena-Moreno, V. N. Serkin
Summary: The objective of this study is to reveal unexpected features of induced modulation instability during its nonlinear stage. The nonlinear stage is investigated through direct computer simulation. The results demonstrate the significant effect of rogue-wave peak power saturation in the zero-gain spectral region. The peak values and subsequent splitting of rogue waves are determined by the total energy stored in one period of an externally modulated quasi-continuous pump wave. The significance of these results lies in the possibility of controlling the formation of rogue waves induced by periodic modulation of the pump.
Article
Physics, Nuclear
Gurpreet Kaur, V Guimaraes, J. C. Zamora, M. Assuncao, J. Alcantara-Nunez, A. L. de Lara, E. O. N. Zevallos, J. B. Ribeiro, R. Lichtenthaler, K. C. C. Pires, O. C. B. Santos, V Morcelle, R. J. DeBoer
Summary: The spectroscopy of C-11 is investigated using the resonant scattering of B-10 + p with the thick target inverse kinematic method. Resonances in C-11 between the excitation energy of 9.6 and 11.8 MeV are observed. The resonant parameters are extracted and compared with previous data.
Article
Physics, Nuclear
O. C. B. Santos, R. Lichtenthaler, K. C. C. Pires, U. Umbelino, E. O. N. Zevallos, A. L. de Lara, A. S. Serra, V Scarduelli, J. Alcantara-Nunez, V Guimaraes, A. Lepine-Szily, J. C. Zamora, A. M. Moro, S. Appannababu, M. Assuncao, A. Barioni, R. Linares, V. A. B. Zagatto, P. N. de Faria, M. C. Morais, V Morcelle, J. M. B. Shorto, Jin Lei
Summary: The study investigates Li-8+Ni-58 collision at different bombarding energies and reveals the strong impact of one-neutron transfer/breakup channels on quasielastic scattering. The analysis shows that nonelastic breakup contributes significantly to Li-7 yields, while elastic breakup plays a minor role.
Article
Physics, Nuclear
R. Linares, Mandira Sinha, E. N. Cardozo, V Guimaraes, G. Rogachev, J. Hooker, E. Koshchiy, T. Ahn, C. Hunt, H. Jayatissa, S. Upadhyayula, B. Roeder, A. Saastomoinen, J. Lubian, M. Rodriguez-Gallardo, J. Casal, K. C. C. Pires, M. Assuncao, Y. Penionzhkevich, S. Lukyanov
Summary: The influence of the cluster configuration of C-10 on elastic scattering was investigated, showing some agreement with experimental data but underestimation at backward angles. Couplings to continuum states have a small effect.
Article
Physics, Nuclear
P. Adsley, F. Hammache, N. de Sereville, V Alcindor, M. Assie, D. Beaumel, M. Chabot, M. Degerlier, C. Delafosse, T. Faestermann, F. Flavigny, S. P. Fox, R. Garg, A. Georgiadou, S. A. Gillespie, J. Guillot, V Guimaraes, A. Gottardo, R. Hertenberger, J. Kiener, A. M. Laird, A. Lefebvre-Schuhl, I Matea, A. Meyer, M. Mahgoub, L. Olivier, L. Perrot, J. Riley, I Sivacek, I Stefan, V Tatischeff, H-F Wirth
Summary: The neutron-unbound levels in F-19 predominantly decay by alpha-particle emission, supporting the role of F-18(n, alpha) N-15 in the production of N-15 in the helium-burning shell of supernovae. Improved resonant-scattering reaction data are required to accurately determine the reaction rates.
Article
Physics, Nuclear
J. E. Riley, A. M. Laird, N. de Sereville, A. Parikh, S. P. Fox, F. Hammache, I Stefan, P. Adsley, M. Assie, B. Bastin, F. Boulay, A. Coc, S. Franchoo, R. Garg, S. A. Gillespie, V Guimaraes, C. Hamadache, N. Hubbard, J. Kiener, A. Lefebvre-Schuhl, F. de Oliveira Santos, A. Remadi, L. Perrot, D. Suzuki, G. Verde, V Tatischeff, M. Williams
Summary: This study aimed to clarify the existence and nature of sub-threshold Ne-19 states in the F-18(p, alpha) O-15 reaction rate. Experimental results from the F-19(He-3, t) Ne-19 charge-exchange reaction revealed a high-spin and low-spin doublet component, shedding light on the uncertainties in the reaction rate.
Article
Physics, Nuclear
K. Wang, Y. Y. Yang, A. M. Moro, V Guimaraes, Jin Lei, D. Y. Pang, F. F. Duan, J. L. Lou, J. C. Zamora, J. S. Wang, Z. Y. Sun, H. J. Ong, X. Liu, S. W. Xu, P. Ma, Z. Bai, Q. Hu, X. X. Xu, Z. H. Gao, G. Yang, S. Y. Jin, Y. H. Zhang, X. H. Zhou, Z. G. Hu, H. S. Xu
Summary: Elastic scattering and breakup angular distributions of the weakly bound radioactive nucleus B-8 on a Pb-208 target at an incident energy of 238 MeV have been measured, showing no significant Coulomb rainbow suppression. The comparison with Be-11 breakup cross section suggests that Coulomb and centrifugal barriers may suppress the breakup cross section of B-8. The measured angular distribution of the Be-7 fragments could be reproduced by considering elastic plus nonelastic breakup contributions.
