Article
Astronomy & Astrophysics
A. H. Santana Valdes, R. Bijker
Summary: The cluster structure of 12C and 13C is investigated using the cluster shell model. Simple relationships for ratios of longitudinal form factors and transition probabilities are derived. It is demonstrated that the experimental data for 12C and 13C can be well explained by a triangular structure with D3h and D'3h symmetries, respectively.
Article
Multidisciplinary Sciences
Junki Tanaka, Zaihong Yang, Stefan Typel, Satoshi Adachi, Shiwei Bai, Patrik van Beek, Didier Beaumel, Yuki Fujikawa, Jiaxing Han, Sebastian Heil, Siwei Huang, Azusa Inoue, Ying Jiang, Marco Knosel, Nobuyuki Kobayashi, Yuki Kubota, Wei Liu, Jianling Lou, Yukie Maeda, Yohei Matsuda, Kenjiro Miki, Shoken Nakamura, Kazuyuki Ogata, Valerii Panin, Heiko Scheit, Fabia Schindler, Philipp Schrock, Dmytro Symochko, Atsushi Tamii, Tomohiro Uesaka, Vadim Wagner, Kazuki Yoshida, Juzo Zenihiro, Thomas Aumann
Summary: The study of alpha cluster formation on the surface of neutron-rich heavy nuclei using quasi-free alpha cluster-knockout reactions reveals a tight interplay with the neutron skin thickness. This result calls for a revision in the correlation between neutron-skin thickness and the density dependence of the symmetry energy, crucial for understanding neutron stars. Additionally, the observed monotonous decrease of reaction cross sections with increasing mass number provides a natural explanation for the origin of alpha particles in alpha decay.
Review
Physics, Multidisciplinary
Siwei Huang, Zaihong Yang
Summary: Formation of neutron clusters from strongly correlated neutrons is a hot topic in nuclear physics. They are crucial for understanding exotic nuclei structures and testing nuclear interactions. Neutron clusters composed purely of neutrons provide a prototype for studying neutron-rich nuclear matter properties. This paper reviews recent highlights of experimental and theoretical works on neutron clusters.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Nuclear
D. Negrea, N. Sandulescu, D. Gambacurta
Summary: This study analyzes the contribution of isovector and isoscalar proton-neutron pairing to the binding energies of even-even nuclei with N - Z = 0, 2, 4 and atomic mass 20 < A < 100. The binding energies are calculated using a mean-field approach coupled with a Skyrme-type functional and a zero-range isovector-isoscalar pairing force. The pairing force is treated in the framework of the quartet condensation model (QCM) which preserves particle number and isospin exactly. The interdependence of pairing and deformation is taken into account through self-consistent Skyrme-HF + QCM calculations in the intrinsic system. It is shown that the binding energies do not change significantly when the isoscalar pairing is activated, which can be attributed to the less attractive off-diagonal matrix elements of the isoscalar force and the competition between isoscalar and isovector pairing channels.
Article
Physics, Multidisciplinary
A. Adel, A. R. Abdulghany
Summary: Proton radioactivity and alpha-decay half-lives of neutron-deficient nuclei have been systematically studied, with a focus on the proton-nucleus interaction potential and density distributions. The study has identified new parameters, successfully reproduced experimental data and verified the applicability of the universal decay law. Experimental confirmation of theoretical calculations indicates satisfactory agreement in the research.
Article
Astronomy & Astrophysics
K. Zhao, Z. Liu, F. S. Zhang, N. Wang
Summary: The study found that the production cross sections for n-rich N=126 residual fragments are several times larger in the U-238 + Pt-198 reaction system than in the Xe-136 + Pt-198 system due to larger cross sections and lower excitation energies of primary fragments. In both systems, N=126 semi-magic residues are produced via neutron emission in the decay of primary fragments, surviving in semi-central collisions with lower excitation energies.
Article
Physics, Nuclear
Varinderjit Singh, J. E. Johnstone, R. Giri, S. Hudan, J. Vadas, R. T. DeSouza, D. Ackermann, A. Chbihi, Q. Hourdille, A. Abbott, C. Balhoff, A. Hannaman, A. B. McIntosh, M. Sorensen, Z. Tobin, A. Wakhle, S. J. Yennello, M. A. Famiano, K. W. Brown, C. Santamaria, J. Lubian, H. O. Soler, B. Carlson
Summary: The study found that shell effects have a significant impact on fusion cross sections of mid-mass nuclei, with different neutron shell structures leading to different outcomes. The use of a more realistic density model can more accurately describe experimental measurements, although it still tends to overpredict closed-shell nuclei.
Article
Physics, Multidisciplinary
Jiawei Chen, Junchen Pei, Yu Qiang, Jihuai Chi
Summary: The fission properties of neutron-rich nuclei Cf-278 and Cf-286 near the end point of the r-process are studied using microscopic self-consistent approaches. Fission barriers and potential energy surfaces are obtained through constrained static Skyrme Hartree-Fock-BCS calculations. Fission fragments are studied through dynamical time-dependent Hartree-Fock+BCS calculations. The results show that Cf-286 has an octupole deformation at the ground state, which can increase the fission barrier height and significantly enhance the spontaneous fission half-life. No very asymmetric fission channels predicted by semi-empirical models are found in our results.
CHINESE PHYSICS LETTERS
(2023)
Article
Physics, Nuclear
Long Zhu, Jun Su
Summary: By comparing fusion-evaporation (FE) and multinucleon transfer (MNT) approaches in the reaction Ca-48 + U-238, a unified description of FE and MNT processes is achieved within the (DNS) model. It is found that a compact configuration enhances fusion probability and the FE process shows great advantages in producing Cn isotopes and superheavy elements beyond oganesson. Additionally, experimental production cross sections of isotopes in FE and MNT processes can be simultaneously reproduced.
Review
Physics, Multidisciplinary
B. Gnoffo, S. Pirrone, G. Politi, G. Cardella, E. De Filippo, E. Geraci, C. Maiolino, N. S. Martorana, A. Pagano, E. V. Pagano, M. Papa, F. Risitano, F. Rizzo, P. Russotto, M. Trimarchi
Summary: An investigation plan is presented to study different clustering and molecular states in neutron rich isotopes of Lithium, Beryllium, Boron and Carbon, using experimental facilities at INFN-Laboratori Nazionali del Sud. The high intensities of exotic beams provided by the FRAISE facility and the use of high-performance experimental apparatus, such as the detectors CHIMERA, FARCOS, and NArCOS, will enable high statistics and new information on known states and new states to be obtained.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Nuclear
Gao Le Yang, Bin Qi, Xu Dong Wang, Chong Qi
Summary: This article analyzes the statistical distribution and correlation relationship of the empirical neutron-proton (np) interaction, and extracts the interaction strengths from the binding energies using a known four-point formula. By comparing the correlations of the data and those from numerical simulations, it is shown that an additional attractive np interaction persists between the last proton and last neutron in odd-odd nuclei.
Article
Physics, Nuclear
R. Bijker, F. Iachello
Summary: The cluster structure of Ne-20 exhibits a bi-pyramidal structure with D-3h symmetry, supported by experimental data showing all expected vibrational modes. This suggests that Ne-20 is another example of simple spectroscopic features emerging from a complex many-body system.
Article
Chemistry, Multidisciplinary
Hai-Ying Wang, Shu-Rong Li, Xing Wang, La-Sheng Long, Xiang-Jian Kong, Lan-Sun Zheng
Summary: The study synthesized a three-dimensional all-inorganic porous structure composed of Mo-154 rings, demonstrating one of the highest reported proton conductivities for POM-based conductive materials. These results suggest that assembling POM-based all-inorganic porous frameworks is a promising approach for designing proton-conductive materials.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Physics, Nuclear
R. Bijker, F. Iachello
Summary: In this study, the cluster structure of Ne-21 and Na-21 was examined using the cluster shell model, revealing a complex cluster structure involving Ne-20+n, Ne-20+p structures, as well as Ne-19+2n, F-19+2p structures. Seven rotational bands were identified in Ne-21 and four in Na-21, attributed to single-particle cluster states, single-hole cluster states, and vibrational states.
Article
Nuclear Science & Technology
En-Bo Huo, Ke-Ran Li, Xiao-Ying Qu, Ying Zhang, Ting-Ting Sun
Summary: The possible exotic nuclear properties in neutron-rich Ca, Ni, Zr, and Sn isotopes were studied using the continuum Skyrme Hartree-Fock-Bogoliubov theory and the Green's function method. The effects of pairing correlation, couplings with continuum, and blocking effects were properly considered. The study found that the neutron-rich isotopes show different properties depending on the criteria used for neutron drip line prediction, and the presence of unpaired odd neutron leads to lower neutron pairing energies in odd-A nuclei compared to neighbor-ing even-even nuclei. Possible halo structures were predicted in neutron-rich Ca, Ni, and Sn isotopes, characterized by significant deviations from the traditional r ? A(1/3) rule and diffuse spatial density distributions. The contributions of various partial waves to the neutron density were analyzed, and it was found that orbitals near the Fermi surface, particularly those with small angular momenta, significantly affect the extended nuclear density and large rms radii. The evolution of the number of neutrons above the Fermi surface as a function of mass number A is consistent with the pairing energy, supporting the important role of pairing correlation in halo phenomena.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Physics, Nuclear
Yu A. Lashko, G. F. Filippov, V. S. Vasilevsky
Article
Physics, Nuclear
Yu. A. Lashko, G. F. Filippov, V. S. Vasilevsky
Article
Physics, Nuclear
A. V. Nesterov, V. S. Vasilevsky, T. P. Kovalenko
PHYSICS OF ATOMIC NUCLEI
(2014)
Article
Physics, Multidisciplinary
Yu. A. Lashko, V. S. Vasilevsky, G. F. Filippov
Article
Physics, Nuclear
A. D. Duisenbay, N. Kalzhigitov, K. Kato, V. O. Kurmangaliyeva, N. Takibayev, V. S. Vasilevsky
Article
Physics, Multidisciplinary
N. Kalzhigitov, N. Zh Takibayev, V. S. Vasilevsky, M. Akzhigitova, V. O. Kurmangaliyeva
NEWS OF THE NATIONAL ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN-SERIES PHYSICO-MATHEMATICAL
(2020)
Article
Physics, Multidisciplinary
A. D. Duisenbay, N. Zh. Takibayev, V. S. Vasilevsky, V. O. Kurmangaliyeva, E. M. Akzhigitova
NEWS OF THE NATIONAL ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN-SERIES PHYSICO-MATHEMATICAL
(2019)
Proceedings Paper
Physics, Nuclear
V. S. Vasilevsky, K. Kato, N. Takibayev
PROCEEDINGS OF THE 4TH INTERNATIONAL WORKSHOP ON STATE OF THE ART IN NUCLEAR CLUSTER PHYSICS (SOTANCP4)
(2018)
Article
Physics, Nuclear
V. S. Vasilevsky, K. Kato, N. Takibayev
Article
Physics, Nuclear
V. S. Vasilevsky, Yu. A. Lashko, G. F. Filippov
Article
Physics, Nuclear
V. S. Vasilevsky, K. Kato, N. Zh. Takibayev
Article
Physics, Multidisciplinary
V. S. Vasilevsky, N. Zh. Takibayev, A. D. Duisenbay
UKRAINIAN JOURNAL OF PHYSICS
(2017)
Article
Physics, Multidisciplinary
V. S. Vasilevsky, M. D. Soloha-Klymchak
UKRAINIAN JOURNAL OF PHYSICS
(2015)
Article
Physics, Multidisciplinary
O. M. Povoroznyk, V. S. Vasilevsky
UKRAINIAN JOURNAL OF PHYSICS
(2015)
Article
Physics, Multidisciplinary
A. V. Nesterov, V. S. Vasilevsky, T. P. Kovalenko
UKRAINIAN JOURNAL OF PHYSICS
(2014)
