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
Astronomy & Astrophysics
Jin Lei, Angela Bonaccorso
Summary: In this paper, the full quantum mechanical model of inclusive breakup is applied to heavy radioactive nuclei reactions on a Be-9 target at intermediate energies. Comparisons are made with the semiclassical transfer to the continuum model to gain insight into the complex heavy-ion reactions. The results show good agreement between the calculated results of both methods and available experimental data, indicating a comprehensive understanding of one nucleon breakup process.
Article
Physics, Nuclear
Wendi Chen, Hairui Guo, Tao Ye, Yangjun Ying, Weili Sun, Yinlu Han
Summary: In this study, the Lagrange-mesh method was employed to discretize the continuum states of weakly bound nuclei for three-body breakup reactions. The combination of this discretization method and the improved Numerov algorithm showed high efficiency and accuracy in the CDCC calculations.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Physics, Nuclear
A. Amar, K. Rusek, Sh. Hamada
Summary: The experimental data of various nucleon transfer reactions and elastic/inelastic scattering for deuteron energy of 14.5 MeV were analyzed using CDCC and CRC methods. The CDCC calculations accurately described the elastic scattering at forward angles, including the deuteron breakup, while backward angles were influenced by target excitation and neutron-transfer reactions. The excitation of 11B and the neutron pickup reaction had the strongest effects, while the proton-transfer reactions were negligible.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Review
Physics, Nuclear
Angela Bonaccorso, David M. Brink
Summary: This paper discusses the evolution of breakup models from fully quantum mechanical to semiclassical approximations, emphasizing the importance of using energy dependent interactions and energy averaging procedures in implementing a quantum mechanical model of breakup. The relationship between different methods is clarified.
EUROPEAN PHYSICAL JOURNAL A
(2021)
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
Astronomy & Astrophysics
S. K. Pandit, A. Shrivastava, K. Mahata, N. Keeley, V. V. Parkar, R. Palit, P. C. Rout, K. Ramachandran, A. Kumar, S. Bhattacharyya, V. Nanal, S. Biswas, S. Saha, J. Sethi, P. Singh, S. Kailas
Summary: The study investigates the origin of large alpha particle production and incomplete fusion in reactions involving weakly bound alpha+x cluster nuclei. By measuring the correlation between outgoing alpha particles and gamma rays from heavy residues in the Li-7(alpha+triton)+Nb-93 system, it was found that the direct cluster-stripping mechanism plays a dominant role in large alpha production.
Article
Physics, Nuclear
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)
Article
Physics, Nuclear
W. R. Alharbi, Awad A. A. Ibraheem
Summary: In this study, the elastic scattering angular distributions (ADs) of the weakly stable Li-6 nucleus from Ca-40, Ni-58, and Zr-90 targets at various energies were theoretically studied. The considered data was reanalyzed using the sophisticated continuum discretized coupled channels (CDCC) method, and reasonable agreements between the theoretical calculations and the data were obtained. The extracted reaction cross-sections for the systems under consideration were compared to previously reported ones.
INTERNATIONAL JOURNAL OF MODERN PHYSICS E
(2023)
Article
Physics, Nuclear
V. V. Parkar, A. Parmar, M. Prasanna, V Jha, S. Kailas
Summary: The relative importance of neutron transfer and breakup process for the Li-7 +Sn-124 system at energies around the Coulomb barrier has been studied using coupled channel calculations. The systematic behavior of one and two neutron stripping and pickup cross sections with a Li-7 projectile on multiple targets has been observed, which can be explained by a simple model based on barrier penetration. By comparing reaction cross sections with measured total fusion and one neutron transfer cross sections, a complete reaction mechanism has been studied.
Article
Engineering, Mechanical
Peilin Fu, Jizhong Zhao, Xu Zhang, Guozheng Kang, Ping Wang, Qianhua Kan
Summary: The study shows that friction heat can decrease the elastic shakedown limit and elastic limit, with increasing sliding velocity enhancing this decrease. Friction heat can also lead to an increase in residual tensile stress near the surface and a weakening of residual compressive stress further from the surface. The temperature dependence of friction coefficient can increase the elastic shakedown limit and elastic limit.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Jianjun Ma, Junjie Chen, Wanxiang Chen, Linchong Huang
Summary: A coupled thermal-elastic-plastic-damage model for concrete subjected to dynamic loading is proposed, taking into account the contributions of temperature change, plasticity hardening/softening, and damage evolution. Cross coupling effects among temperature, damage, strain rate and plasticity are considered through the consistent condition of thermodynamic model.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Multidisciplinary
Adrian Gonzalez-Nelson, Srinidhi Mula, Mantas Simenas, Sergejus Balciunas, Adam R. Altenhof, Cameron S. Vojvodin, Stefano Canossa, Juras Banys, Robert W. Schurko, Francois-Xavier Coudert, Monique A. van der Veen
Summary: The organic components in MOFs exhibit unique dynamic behavior, with the rotation of organic linkers playing a crucial role in determining their properties. By modifying the structure and environment of the linkers, the rotation speed and mode can be controlled to achieve function-specific cooperative motion.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Nuclear
M. A. G. Alvarez, M. Rodriguez-Gallardo, J. P. Fernandez-Garcia, J. Casal, J. A. Lay
Summary: The study presents systematic optical model and continuum discretized coupled channel calculations for elastic scattering of exotic and stable nuclei projectiles on heavy targets, showing that the predictions from OM and CDCC corroborate each other and account for important differences in the nuclei reaction mechanisms.
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
Astronomy & Astrophysics
A. M. Moro, J. A. Lay, J. Gomez Camacho
Article
Astronomy & Astrophysics
F. F. Duan, Y. Y. Yang, K. Wang, A. M. Moro, V Guimaraes, D. Y. Pang, J. S. Wang, Z. Y. Sun, Jin Lei, A. Di Pietro, X. Liu, G. Yang, J. B. Ma, P. Ma, S. W. Xu, Z. Bai, X. X. Sun, Q. Hu, J. L. Lou, X. X. Xu, H. X. Li, S. Y. Jin, H. J. Ong, Q. Liu, J. S. Yao, H. K. Qi, C. J. Lin, H. M. Jia, N. R. Ma, L. J. Sun, D. X. Wang, Y. H. Zhang, X. H. Zhou, Z. G. Hu, H. S. Xu
Article
Physics, Nuclear
V. Avrigeanu, M. Avrigeanu
Summary: This study validates a consistent set of statistical-model input parameters through analysis of various independent data, enabling the evaluation of an alpha-particle optical model potential, including for nucleon-induced alpha-emission within the A similar to 60 mass-number range. It also considers additional reaction channels leading to increased alpha-emission beyond statistical predictions, particularly focusing on features similar to the pickup direct interaction and Giant Quadrupole Resonance.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
M. Gomez-Ramos, J. Gomez-Camacho, Jin Lei, A. M. Moro
Summary: In 1985, Hussein and McVoy introduced a formula for evaluating the nonelastic breakup contribution in inclusive breakup reactions, which has become the standard procedure for analyzing single-nucleon knockout reactions at intermediate energies due to its simple and appealing form in the eikonal limit. This contribution critically assesses the formula and discusses its connection with other noneikonal expressions, presenting calculations comparing different formulae for the one-nucleon removal of the 14O+9Be reaction at various incident energies.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Physics, Nuclear
M. Avrigeanu, D. Rochman, A. J. Koning, U. Fischer, D. Leichtle, C. Costache, V Avrigeanu
Summary: This study evaluates the details and outcomes of the breakup model in TALYS, as well as the enhancement obtained using the evaluated nucleon-induced reaction data of TENDL-2019. The discussion includes the limitations in directly interpreting the results of deuteron-induced reactions.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Astronomy & Astrophysics
M. Holl, R. Kanungo, Z. H. Sun, G. Hagen, J. A. Lay, A. M. Moro, P. Navratil, T. Papenbrock, M. Alcorta, D. Connolly, B. Davids, A. Diaz Varela, M. Gennari, G. Hackman, J. Henderson, S. Ishimoto, A. Kilic, R. Krucken, A. Lennarz, J. Liang, J. Measures, W. Mittig, O. Paetkau, A. Psaltis, S. Quaglioni, J. S. Randhawa, J. Smallcombe, I. J. Thompson, M. Vorabbi, M. Williams
Summary: In the experiment on proton inelastic scattering of He-8 at 8.25A MeV at TRIUMF, a resonance at 3.54 MeV with a large deformation parameter beta(2) = 0.40(3) was discovered, consistent with predictions of neutron deformation. This reveals a new paradigm of deformed double-closed shell at the neutron drip-line.
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
Physics, Nuclear
M. Avrigeanu, V. Avrigeanu
Summary: The reliability of a previous alpha-particle optical-model potential (OMP) has been confirmed for proton-induced reactions on Zn isotopes and neutrons on Zr stable isotopes. A recent assessment of this potential for nucleon-induced alpha emission on A approximately 60 nuclei, including pickup direct reaction and eventual giant quadrupole resonance (GQR) alpha emission, was completed. Consistent sets of input parameters were determined through analysis of independent data to avoid parameter ambiguities and/or error compensation.
Article
Physics, Nuclear
V. Avrigeanu, M. Avrigeanu
Summary: This study analyzed the process of alpha-particle emission induced by neutron reactions on stable nickel isotopes and validated the effectiveness of using the same potential in the alpha-particle optical model for describing the absorption and emission processes. Furthermore, it confirmed the existence of pickup direct reactions and alpha-emission beyond statistical predictions around the Giant Quadrupole Resonance (GQR) energies through recent experimental data.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Physics, Nuclear
E. Simeckova, M. Avrigeanu, J. Mrazek, J. Novak, M. Stefanik, C. Costache, V Avrigeanu
Summary: The study aims to enhance the database of deuteron-induced reactions by accurately measuring low-energy reaction cross sections, achieving a unified and consistent account of mechanisms such as deuteron breakup, direct reactions, pre-equilibrium emission, and compound nucleus decay.
Article
Physics, Nuclear
L. Moschini, A. M. Moro, A. Vitturi
Summary: The paper introduces a simple model for studying the evolution of a single-particle wave function when a one-dimensional potential well collides with another well. Different approaches are investigated to understand the dynamics involving one-body halo-like systems, with the inclusion of the continuum being crucial for reproducing the exact solution.
Proceedings Paper
Nuclear Science & Technology
Jaromir Mrazek, Eva Simeckova, Radomir Behal, Vadim Glagolev, Frantisek Vesely, Milan Stefanik, Mitja Majerle, Jan Novak, Martin Ansorge, Ivan Sivacek, Jitka Vrzalova, Xavier Ledoux, Francois de Oliveira Santos, Ulrich Fischer, Axel Klix, Marilena Avrigeanu, Vlad Avrigeanu
ND 2019: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY
(2020)
Proceedings Paper
Nuclear Science & Technology
Marilena Avrigeanu, Cristian Costache, Vlad Avrigeanu
ND 2019: INTERNATIONAL CONFERENCE ON NUCLEAR DATA FOR SCIENCE AND TECHNOLOGY
(2020)
Article
Physics, Nuclear
M. Gomez-Ramos, A. Deltuva, A. M. Moro
Article
Physics, Nuclear
M. Avrigeanu, E. Simeckova, U. Fischer, J. Mrazek, J. Novak, M. Stefanik, C. Costache, V Avrigeanu
