Article
Physics, Multidisciplinary
Fakeha Farooq, Jameel-Un Nabi, Ramoona Shehzadi
Summary: This study reports the key nuclear properties of weak beta-decay processes on Yttrium isotopes in the mass number range A = 101-108. Results show good agreement between experimental data and theoretical works, which may be helpful for r-process simulations in astrophysical scenarios.
Article
Physics, Nuclear
F. Browne, A. M. Bruce, T. Sumikama, I. Nishizuka, S. Nishimura, P. Doornenbal, J. G. Li, G. Lorusso, P. -a. Soderstrom, P. M. Walker, H. Watanabe, F. R. Xu, R. Daido, Z. Patel, S. Rice, L. Sinclair, J. Wu, Z. Y. Xu, A. Yagi, H. Baba, N. Chiga, R. Carroll, F. Didierjean, Y. Fang, N. Fukuda, G. Gey, E. Ideguchi, N. Inabe, T. Isobe, D. Kameda, I. Kojouharov, N. Kurz, T. Kubo, S. Lalkovski, Z. Li, R. Lozeva, N. Nishibata, A. Odahara, Zs. Podolyak, P. H. Regan, O. J. Roberts, H. Sakurai, H. Schaffner, G. S. Simpson, H. Suzuki, H. Takeda, M. Tanaka, J. Taprogge, V. Werner, O. Wieland
Summary: Isomeric states were observed in nuclei spanning a predicted shape change boundary, and preliminary assignments were made based on potential-energy surface calculations. The results suggest significant deformation in this region.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
S. Sidorov, D. Zhulyaeva, T. Tretyakova
Summary: This study investigates excited states in the low-energy spectra of Ni70-76. It employs pairing forces in the form of surface delta interaction to explain the formation of the ground state multiplet with seniority nu = 2 states. The splitting of the multiplet is described using mass relationships of neighboring nuclei. The seniority model is then used to reproduce or predict specific states in odd-even isotopes and even-even isotopes. The results are compared with the structure of similar multiplets in N = 50 isotones.
Article
Chemistry, Physical
Enyue Zhao, Kang Wu, Zhigang Zhang, Zhendong Fu, Hanqiu Jiang, Yubin Ke, Wen Yin, Kazutaka Ikeda, Toshiya Otomo, Fangwei Wang, Jinkui Zhao
Summary: Li-rich layered transition metal oxides have shown promising potential as cathodes for Li-ion batteries due to their accessible lattice oxygen redox at high voltages. However, this redox process is also associated with electrochemical issues such as voltage hysteresis and voltage decay. This study reveals the coupling between redox and structure evolutions and their effects on electrochemical properties.
Article
Physics, Nuclear
Xin-Rui Zhang, Gen Zhang, Jing-Jing Li, Shi-Hui Cheng, Zhong Liu, Feng-Shou Zhang
Summary: This study investigates the role of driving potentials in different orientation configurations in the Kr-86 + Er-166 and Hg-204 + Th-232 reactions. It is found that the Coulomb potential predominantly affects the driving potential in the mass number range of 52-200, while the nuclear potential becomes significant for mass numbers outside this range. In the Hg-204 + Th-232 reaction, the tip-to-tip configuration leads to the production of unknown neutron-rich isotopes due to the inverse quasifission process. The optimal incident energy is determined to be 678.1 MeV.
Article
Geochemistry & Geophysics
Qiushi Guan, Yuan Mei, Barbara Etschmann, Marion Louvel, Denis Testemale, Evgeniy Bastrakov, Joel Brugger
Summary: Rare earth elements (REE) are important in various geological environments due to their stability as sulfate complexes. This study examined the speciation and thermodynamic properties of yttrium(III) in sulfate and sulfate-chloride solutions using molecular dynamics simulations and X-Ray Absorption Spectroscopy. The results showed that yttrium sulfate complexes become more stable with increasing temperature and the presence of sulfate can increase yttrium solubility. The findings have implications for understanding REE transport and deposition processes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Astronomy & Astrophysics
Kamila Sieja
Summary: This study gains new insights into the structure of Sr isotopes in the region of N=60 through experimental studies on excited levels, transition strengths, and spectroscopic factors. A classic shell model is used to describe the structure of Sr isotopes, and spectroscopic factors are computed to understand the evolution of low-energy excitations. The origin of deformation at N=60 is mentioned in the context of shell model and Monte Carlo shell model calculations.
Article
Engineering, Civil
Kai Yan, Chunlian Wang, Renyi Chen, Chenglin Liu, Jiuyi Wang, Xiaocan Yu, Lijian Shen, Ruiqin Li, Yang Zhou, Qiang Zhou
Summary: This study investigates the origin, evolution, and enrichment mechanism of lithium-rich brines from the upper Cretaceous and lower Eocene in the Jiangling depression. The brines show enrichment of potassium, calcium, and strontium, and depletion of magnesium, which may be due to halite dissolution and water-rock interaction. The isotopic compositions and strontium isotope ratios of the brines suggest that they originated from meteoric waters and experienced intense evaporation. The lithium content and δ7Li values of the brines indicate that water-rock interaction and halite dissolution led to the enrichment of lithium in the brines.
JOURNAL OF HYDROLOGY
(2023)
Article
Chemistry, Physical
Jeongsuk Seo, Sieun Jeong, Sohyeon Kim
Summary: This study successfully synthesized less-defective LaNbON2 particles using La-rich oxide mixtures as precursors, which exhibited enhanced photocatalytic and photo-electrochemical activities under visible light.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jue Liu, Zhijia Du, Xuelong Wang, Sha Tan, Xianyang Wu, Linxiao Geng, Bohang Song, Po-Hsiu Chien, S. Michelle Everett, Enyuan Hu
Summary: Ni-rich cathodes undergo a four-stage structural evolution during the initial cycle, with a universal structural transition occurring at around 75% delithiation. This transition, marked by an anomalous increase in average TM-O bond lengths, is induced by the direct oxidation of lattice oxygen ions. The onset of this transition correlates well with the release of oxygen gas and decline in capacity retention, highlighting its crucial role in the degradation process.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Physics, Nuclear
Shu-Ya Jin, Ya-Zhou Sun, Shi-Tao Wang, Zhi-Yu Sun, Xue-Heng Zhang, Zhi-Qiang Chen, Bo Mei, Yi-Xuan Zhao, Shu-Wen Tang, Yu-Hong Yu, Duo Yan, Fang Fang, Yong-Jie Zhang, Shao-bo Ma, Xiang-Man Liu, Rui Han
Summary: The elemental fragmentation cross sections of boron fragments produced by stable and neutron-rich C12-16 beams with a carbon target were systematically measured, and it was found that the cross sections increase as the mass number of the projectile increases. The observed feature is qualitatively explained using the abrasion-ablation two-stage reaction model, and it is quantitatively compared with predictions from various reaction models. All models agree with the measured cross sections within a factor of 2.
Article
Materials Science, Multidisciplinary
Emily A. D. Brady, Eric M. Taleff
Summary: Investigation on plastic deformation and microstructure evolution of low-impurity niobium at elevated temperatures reveals significant static grain growth and dislocation substructure. Recommendations for modulus values of randomly textured polycrystalline niobium are provided alongside analysis of steady-state creep behavior.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Physics, Multidisciplinary
V. S. Minkov, V. Ksenofontov, S. L. Bud'ko, E. F. Talantsev, M. I. Eremets
Summary: Measurements of trapped magnetic flux in high-pressure hydrides provide further evidence for their superconductivity at high temperatures. A non-conventional protocol using a SQUID magnetometer was implemented to probe the trapped magnetic flux in near-room-temperature superconductors H3S and LaH10 at high pressures. The results demonstrate the existence of superconductivity and reveal the strong pinning of vortices in these materials, explaining the absence of a pronounced Meissner effect. This approach can also be applied to study multiphase samples or samples with low superconducting fractions at ambient pressure.
Article
Chemistry, Inorganic & Nuclear
Ryoko Suzuki, Tomoki Nagai, Emika Onitsuka, Naokazu Idota, Masashi Kunitake, Taisei Nishimi, Yoshiyuki Sugahara
Summary: Water-dispersible and surface-active Janus nanosheets based on K4Nb6O17·3H2O were synthesized by sequential regioselective surface modification. An o/w emulsion formed using the Janus nanosheet dispersion exhibited distinct coalescence and Ostwald ripening behaviors, likely due to the anisotropic structures of the nanosheets.
DALTON TRANSACTIONS
(2022)
Article
Astronomy & Astrophysics
Sebastian Kubis, Wlodzimierz Wojcik
Summary: This study discusses the deformation of nuclei in the neutron star crust using a model of two charged fluids separated by a phase boundary. Specifically, the behavior of cylindrical and spherical portions of the charged fluids is examined in both vacuum and charged surroundings. The electric Bond number is identified as a crucial parameter in the analysis, and the virial theorem is found to reduce the influence of electric forces. While the analysis is motivated by nuclear pasta phases, the findings can be applied to any system of two charged fluids.
Article
Astronomy & Astrophysics
A. Vitez-Sveiczer, A. Algora, A. Morales, B. Rubio, G. G. Kiss, P. Sarriguren, P. Van Isacker, G. de Angelis, F. Recchia, S. Nishimura, J. Agramunt, V Guadilla, A. Montaner-Piza, S. E. A. Orrigo, A. Horvath, D. Napoli, S. Lenzi, A. Boso, V. H. Phong, J. Wu, P-A Soderstrom, T. Sumikama, H. Suzuki, H. Takeda, D. S. Ahn, H. Baba, P. Doornebal, N. Fukuda, N. Inabe, T. Isobe, T. Kubo, S. Kubono, H. Sakurai, Y. Shimizu, C. Sidong, B. Blank, P. Ascher, M. Gerbaux, T. Goigoux, J. Giovinazzo, S. Grevy, T. Kurtukian Nieto, C. Magron, W. Gelletly, Zs Dombradi, Y. Fujita, M. Tanaka, P. Aguilera, F. Molina, J. Eberth, F. Diel, D. Lubos, C. Borcea, E. Ganioglu, D. Nishimura, H. Oikawa, Y. Takei, S. Yagi, W. Korten, G. de France, P. Davies, J. Liu, J. Lee, T. Lokotko, I Kojouharov, N. Kurz, H. Shaffner, A. Petrovici
Summary: The beta-decay of the even-even nucleus Kr-70 with Z=N+2 was investigated, and fifteen gamma-rays associated with the beta-decay were identified for the first time. The half-life of Kr-70 and the beta-delayed proton emission probability were determined with increased precision. The study observed an increase in the beta-strength to the yrast 1(+) state, indicating potential increased np correlations in the T=0 channel.
Article
Astronomy & Astrophysics
P. Sarriguren
Summary: Elastic electron scattering from oriented odd -A axially deformed nuclei is studied in the plane-wave Born approximation. The interference form factors between monopole and quadrupole Coulomb terms that characterize the nuclear response with aligned nuclear targets are shown to increase or decrease the unpolarized cross-section, depending on the sign of the quadrupole deformation. This feature provides valuable information on the nuclear deformation that can be used as a signature of the oblate or prolate character of the nuclear shape. Some selected cases of nuclei with different spins are presented that exemplify the scope of the method.
Article
Chemistry, Physical
Shadan Ghassemi Tabrizi, R. Rodriguez-Guzman, Carlos A. A. Jimenez-Hoyos
Summary: This study presents a method to address the variational inclusion of spin-orbit coupling in self-consistent field calculations. By performing generalized Hartree-Fock calculations, the orientation of the magnetic moment is determined, and a complete g-tensor is obtained through non-orthogonal configuration interaction.
Article
Physics, Nuclear
J. T. Zhang, P. Ma, Y. Huang, X. L. Tu, P. Sarriguren, Z. P. Li, Y. Kuang, W. Horiuchi, T. Inakura, L. Xayavong, Y. Sun, K. Kaneko, X. Q. Liu, K. Yue, C. J. Shao, Q. Zeng, B. Mei, P. Egelhof, Yu. A. Litvinov, M. Wang, Y. H. Zhang, X. H. Zhou, Z. Y. Sun
Summary: Small-angle differential cross sections of proton elastic scattering off 78Kr with a collision energy of 152.7 MeV/u were measured using the Glauber model at HIRFL-CSR. A model-dependent root-mean-square matter radius of 4.16(12) fm for the 78Kr nucleus was deduced, slightly larger than the proton radius of 4.13 fm for 78Kr. However, considering the relatively large radius error of 78Kr, the difference is not statistically significant and further experiments are necessary.
Article
Physics, Nuclear
R. Rodriguez-Guzman, L. M. Robledo
Summary: The emergence and stability of static octupole deformation in Dy isotopes are analyzed using mean-field and beyond-mean-field techniques. It is found that N ti 134 isotopes exhibit static octupole deformations while N ti 88 isotopes have reflection-symmetric ground states. However, neither of these levels of approximation is sufficient to determine the nature of octupole dynamics in Dy isotopes. The increased octupole collectivity in Dy isotopes with N ti 88 and N ti 134 is concluded to be vibrational in nature.
Review
Physics, Nuclear
M. Baldo, L. M. Robledo, X. Vinas
Summary: The foundation and applications of the Barcelona Catania Paris Madrid (BCPM) energy density functional are briefly reviewed. BCPM uses a paradigm more rooted on density functional theory and fits most of its parameters to sophisticated microscopic nuclear matter calculations. Finite nuclei are accounted for by introducing a direct finite range surface term, spin orbit potential, Coulomb interaction and pairing. Applications of this functional to the calculation of finite nuclei properties are presented as well as applications to the description of neutron star physics. The large number of applications discussed are possible because of the local character of the functional that simplifies enormously calculations in finite nuclei.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
R. Rodriguez-Guzman, L. M. Robledo, Carlos A. Jimenez-Hoyos, N. C. Hernandez
Summary: This study analyzes the impact of dynamic pairing correlations and their interplay with Coulomb antipairing effects on the systematic of the spontaneous fission half-lives for the nuclei 240-250Cm and 240-250Cf. The results show that considering the pairing degree of freedom significantly reduces the spontaneous fission half-lives, and the least action path is more consistent with the experiment than the least energy path.
Article
Physics, Nuclear
Z. Y. Xu, M. Madurga, R. Grzywacz, T. T. King, A. Algora, A. N. Andreyev, J. Benito, T. Berry, M. J. G. Borge, C. Costache, H. De Witte, A. Fijalkowska, L. M. Fraile, H. O. U. Fynbo, A. Gottardo, C. Halverson, L. J. Harkness-Brennan, J. Heideman, M. Huyse, A. Illana, L. Janiak, D. S. Judson, A. Korgul, T. Kurtukian-Nieto, I. Lazarus, R. Lica, R. Lozeva, N. Marginean, R. Marginean, C. Mazzocchi, C. Mihai, R. E. Mihai, A. I. Morales, R. D. Page, J. Pakarinen, M. Piersa-Silkowska, Zs. Podolyak, P. Sarriguren, M. Singh, Ch. Sotty, M. Stepaniuk, O. Tengblad, A. Turturica, P. Van Duppen, V. Vedia, S. Vinals, N. Warr, R. Yokoyama, C. X. Yuan
Summary: The decay properties of 133In were studied in detail, and the decay strengths above the neutron separation energy were quantified for the first time. The different nuclear states were distinguished, and spins and parities were assigned to neutron-unbound states based on the measurements.
Article
Physics, Nuclear
O. Moreno, P. Sarriguren, A. Algora, L. M. Fraile, S. E. A. Orrigo
Summary: This study describes the ground and isomeric states of the neutron-deficient odd-A isotopes 183Hg, 185Hg, and 187Hg using a microscopic calculation based on a self-consistent, axially deformed Hartree-Fock mean field with the Skyrme functional and pairing within BCS approximation. The results on mean-square charge radii and magnetic dipole moments for different odd-neutron states and equilibrium shapes are analyzed in terms of their sensitivity to nuclear deformation, spin, and parity. Additionally, spin-isospin correlations are introduced to obtain the distributions of Gamow-Teller strength and the beta+/EC half-lives of these isotopes.
Article
Physics, Nuclear
R. Rodriguez-Guzman, L. M. Robledo
Summary: The competition between Coulomb antipairing and restricted particle number symmetry restoration in a selected set of Fermium and Nobelium isotopes reveals that the Coulomb antipairing is partially compensated by beyond-mean-field pairing correlations. However, the compensation is not perfect, and the combined effect on fission dynamics cannot be overlooked.
Article
Optics
Javier Faba, Vicente Martin, Luis Robledo
Summary: In this paper, the performance of Hartree-Fock method and generator coordinate method in solving the quantum many-body problem for fermions is analyzed using the Lipkin model. It is found that these methods can reasonably well reproduce the exact ground state's quantum discord in certain partitions.
Article
Physics, Nuclear
L. M. Robledo
Summary: A recently developed formalism is used to perform generator coordinate method calculations with Hartree-Fock-Bogoliubov wave functions, where each member of the set can be expanded in an arbitrary basis. This paper assumes that the HFB wave functions are expanded in harmonic oscillator bases with different oscillator lengths. General expressions to compute the required matrix elements of arbitrary operators are provided. The application of this formalism in the case of fission is illustrated with an example.
Article
Physics, Nuclear
J. A. Briz, M. J. G. Borge, B. Rubio, J. Agramunt, A. Algora, A. Y. Deo, M. E. Estevez Aguado, G. Farrelly, L. M. Fraile, W. Gelletly, A. Maira, E. Nacher, A. Perea, Zs Podolyak, A. Poves, P. Sarriguren, O. Tengblad
Summary: The spins and parities of low-lying states in 72Br, which are generated from the beta decay of 72Kr, were investigated using conversion electron spectroscopy. The results provide insights into the level structure and shape characteristics of 72Br, and E0 transitions in neighboring isobaric nuclei were also studied.
Article
Physics, Nuclear
P. Sarriguren
Summary: The competition between alpha- and beta(+) /EC-decay modes in superheavy nuclei synthesis is systematically studied. The alpha decay is found to be the dominant decay mode in most cases, but there are interesting instances where the half-lives of both modes are comparable, indicating the possibility of new pathways to more neutron-rich nuclei in this region.