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
Chemistry, Physical
M. A. Makarem, M. Farsi, M. R. Rahimpour
Summary: The research focuses on computational fluid dynamics simulation of CO2 capturing by aqueous DEA solution in a T-Junction microchannel contactor, revealing the significant effects of liquid velocity and amine concentration on CO2 absorption rate and hydrogen purification efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Geology
Anna Lene Claussen, Axel Munnecke, Andrej Ernst
Summary: The bryostromatolites formed by encrusting bryozoans in association with microbes on Gotland Island during the Sheinwoodian to Ludfordian stratigraphy reveal evidence of cyclic environmental changes and show unique structural features. Deciphering these bryostromatolites provides insights into how these reef structures responded to climatic and oceanographic changes during their formation.
Article
Geosciences, Multidisciplinary
Jose Joao Lelis Leal de Souza, Bartolomeu Israel Souza, Rafael Albuquerque Xavier, Eini Celly Morais Cardoso, Joseilson Ramos de Medeiros, Christiane Farias da Fonseca, Carlos Ernesto Goncalves Reynaud Schaefer
Summary: This study describes the high SOC soils in the semiarid Borborema Plateau in Brazil and discusses the soil-forming processes and landscape evolution. These soils with high SOC content represent hotspots in the semiarid region and protect relic vegetation from wetter paleoenvironments.
Article
Geography, Physical
Jose N. Perez-Asensio, Kazuyo Tachikawa, Laurence Vidal, Thibault de Garidel-Thoron, Corinne Sonzogni, Abel Guihou, Pierre Deschamps, Stephan J. Jorry, Min-Te Chen
Summary: This study reconstructs the spatial and temporal evolution of glacial carbon-rich deep waters in the southwest Indian Ocean over the past 630 kyr. The analysis of sediment samples reveals that orbital forcing, restricted air-sea exchange, and enhanced ocean stratification fostered higher carbon storage during periods of relatively lower eccentricity and obliquity.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geochemistry & Geophysics
A. T. Hertwig, M-C Liu, A. J. Brearley, S. B. Simon
Summary: The translation mainly introduces the compositional analysis and mineralogical characteristics of two unique CAIs. Mesquite is characterized by its large size and layered structure, while Y24 stands out for its distinct mineral composition.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Chenyu Han, Wenming Jiang, Yang Liu, Zhuoying Dou, Bingxu Jin
Summary: A hydrogen purification system with a pretreatment process using a supersonic nozzle is proposed to enhance the performance of CO2 removal processes from hydrogen-rich streams. A mathematical model is developed to investigate the feasibility of capturing CO2 in a hydrogen-rich stream using the supersonic nozzle. The results show that the nozzle is suitable for purifying hydrogen-rich streams with low temperatures and high carbon content, indicating its potential as a carbon capture method.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Applied
Jian Hu, Long Chen, Pengzhang Chen, Shixi Gu, Yu Zhou, Jilong Zhang, Wenjie Zhao, Honglin Tao, Nan Zhou, Baobin Mi, Fangfang Wu
Summary: A new two-step catalytic pyrolysis process (TSCP) based on poly-generation technology was proposed to convert reed straw (RS) into phenol-rich bio-oil, hydrogen-rich gas, and solid carbon degradation material. The effects of the first step pyrolysis temperature (T1) and catalyst composition on product distribution and target product selectivity were investigated. Iron-loaded activated carbon catalysts promoted the selective production of phenolic compounds and hydrogen gas through various reactions. This study contributes to the comprehensive utilization of reed and provides a reference for the utilization of other agricultural and forestry wastes.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Geology
Megan E. Smith, Peter K. Swart
Summary: The global correlation of negative excursions in delta C-13 values can be used to interpret major environmental changes, but diagenetic processes can affect these correlations.
SEDIMENTARY GEOLOGY
(2022)
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
Environmental Sciences
Lin Chen, Jin Yuan, Tianbao Li, Xia Jiang, Shenggui Ma, Wanglai Cen, Wenju Jiang
Summary: In this study, nitrogen-rich hierarchical porous carbons (NPCs) were synthesized from cypress saw-dust via a one-step strategy, showing excellent performance for H2S removal with high sulfur capacity and regeneration ability. The NPCs with carbon nitride (CN) loading exhibited a hierarchical porous structure with high nitrogen content, identified as active sites for H2S adsorption. These results demonstrate that NPCs are promising catalysts for efficient H2S removal with low cost and high reusability.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Astronomy & Astrophysics
Kenta Hotokezaka, Masaomi Tanaka, Daiji Kato, Gediminas Gaigalas
Summary: The study of the nebular phase of lanthanide-rich ejecta from a neutron star merger provides insights into the cooling mechanisms and stability of ionization and thermal balance over time. Both permitted and forbidden lines contribute to the cooling rate of Ndii and Ndiii, with the kinetic temperature and ionization degree stabilizing after a thermalization break. The emission-line nebular spectrum of pure Nd ejecta exhibits distinctive peak structures.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Geochemistry & Geophysics
Yi-Wei Liu, Sebastian D. Rokitta, Bjorn Rost, Robert A. Eagle
Summary: This study investigated the carbon utilization and internal pH regulation of three calcareous coccolithophores cultured under different pCO(2) levels. The results show species-specific modes of pH control and differences in the utilization of inorganic carbon. The findings suggest a high plasticity in the utilization of dissolved inorganic carbon may explain species-specific differences in responses to ocean acidification.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
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
Environmental Sciences
Gael Le Croizier, David Point, Marina Renedo, Jean-Marie Munaron, Pepe Espinoza, Felipe Amezcua-Martinez, Sophie Lanco Bertrand, Anne Lorrain
Summary: This study analyzed mercury concentrations, biomagnification, and isotopic discrimination factors in two seabird species and their main prey in the Humboldt Current ecosystem. The results showed similar biomagnification and δC-13 values to previous studies on captive piscivorous seabirds, but lower δN-15 values. The lower mercury concentrations in Humboldt seabirds compared to other oligotrophic ecosystems may be due to mercury biodilution in the high biomass of lower trophic levels.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Biomedical
Yoshi-hide Sato, Dousatsu Sakata, David Bolst, Edward C. Simpson, Susanna Guatelli, Akihiro Haga
Summary: This study aims to improve fragment production in water phantoms by developing a more accurate QMD model in Geant4. The QMD model was developed by implementing modern Skyrme interaction parameter sets and an ad hoc alpha-cluster model. Multi-objective optimization (MOO) was performed to optimize the QMD model, and the results showed that the optimized model can significantly improve light fragment yields in water and accurately reproduce the kinetic energy distribution of the fragments.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Physics, Multidisciplinary
A. Gade, B. A. Brown, D. Weisshaar, D. Bazin, K. W. Brown, R. J. Charity, P. Farris, A. M. Hill, J. Li, B. Longfellow, D. Rhodes, W. Reviol, J. A. Tostevin
Summary: A novel pathway for the formation of multiparticle-multihole excited states in rare isotopes is reported, where highly energy-and momentum-dissipative inelastic-scattering events are observed. These events were measured in reactions of an intermediate-energy beam of 38Ca on a Be target. The study shows that these energetic collisions offer a practical pathway to nuclear-structure studies of more complex multiparticle configurations in rare isotopes.
PHYSICAL REVIEW LETTERS
(2022)
Article
Astronomy & Astrophysics
B. M. A. Swinton-Bland, J. Buete, D. J. Hinde, M. Dasgupta, T. Tanaka, A. C. Berriman, D. Y. Jeung, K. Banerjee, L. T. Bezzina, I. P. Carter, K. J. Cook, C. Sengupta, C. Simenela, E. C. Simpson, M. A. Stoyer
Summary: The observation of mass-asymmetric fission in neutron-deficient 180Hg expanded the region of mass-asymmetric fission and stimulated research on the fission of sub-lead nuclei. The fission modes of 178Pt were investigated, revealing the presence of three modes: one mass-symmetric and two mass-asymmetric. New high-statistics data were obtained and analyzed, highlighting the importance of fitting the two-dimensional mass-kinetic energy distribution for accurate results. Systematic studies and rigorous statistical analysis are crucial to determine the shell effects responsible for multi-modal mass-asymmetric fission in this region.
Article
Astronomy & Astrophysics
D. Y. Jeung, D. J. Hinde, M. Dasgupta, C. Simenel, E. C. Simpson, K. J. Cook, H. M. Albers, J. Buete, I. P. Carter, Ch. E. Duellmann, J. Khuyagbaatar, B. Kindler, N. Lobanov, B. Lommel, C. Mokry, E. Prasad, J. Runke, C. Sengupta, J. F. Smith, P. Thoerle-Pospiech, N. Trautmann, K. Vo-Phuoc, J. Walshe, E. Williams, A. Yakushev
Summary: Measured binary quasifission mass spectra in reactions with actinide nuclides show a peak near 208Pb, which is attributed to the enhanced binding energy and potential energy surface. Cross-sections for sequential fission increase as binary cross-sections decrease with heavier nuclides, indicating that the 208Pb peak originates mainly from sequential fission of heavier fragments. These findings call for a re-interpretation of quasifission characteristics and dynamics in superheavy element synthesis reactions.
Article
Astronomy & Astrophysics
L. Morrison, K. Hadynska-Klek, Zs. Podolyak, L. P. Gaffney, M. Zieli, B. A. Brown, H. Grawe, P. D. Stevenson, T. Berry, A. Boukhari, M. Brunet, R. Canavan, R. Catherall, J. Cederkaell, S. J. Colosimo, J. G. Cubiss, H. De Witte, D. T. Doherty, Ch. Fransen, G. Georgiev, E. Giannopoulos, M. Gorska, H. Hess, L. Kaya, T. Kroell, N. Lalovic, B. Marsh, Y. Martinez Palenzuela, G. O'Neill, J. Pakarinen, J. P. Ramos, P. Reiter, J. A. Rodriguez, D. Rosiak, S. Rothe, M. Rudigier, M. Siciliano, E. C. Simpson, J. Snall, P. Spagnoletti, S. Thiel, N. Warr, F. Wenander, R. Zidarova
Summary: The first low-energy Coulomb-excitation measurement of 206Hg, a radioactive semi-magic nucleus, was conducted at CERN's HIE-ISOLDE facility. The experiment observed two gamma rays from the depopulation of low-lying states in 206Hg. The results provide crucial information for understanding quadrupole and octupole collectivity near the heaviest double-magic nucleus 208Pb and can be used to test theoretical calculations relevant to astrophysical processes.
Article
Astronomy & Astrophysics
H. Wang, M. Yasuda, Y. Kondo, T. Nakamura, J. A. Tostevin, K. Ogata, T. Otsuka, A. Poves, N. Shimizu, K. Yoshida, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. Delbart, Q. Deshayes, Z. Dombradi, C. Douma, Z. Elekes, P. Fallon, I. Gasparic, J. M. Gheller, J. Gibelin, A. Gillibert, M. N. Harakeh, A. Hirayama, C. R. Hoffman, M. Holl, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I. Kuti, V. Lapoux, S. Lindberg, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. A. Najafi, K. Nakano, N. Nakatsuka, T. Nilsson, A. Obertelli, N. A. Orr, H. Otsu, T. Ozaki, V. Panin, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, T. Uesaka, Z. Yang, K. Yoneda
Summary: In this study, detailed ?-ray spectroscopy of the Ne-28 isotope was performed for the first time using the one-neutron removal reaction from 29Ne. Based on an analysis of momentum distributions, a level scheme with spin-parity assignments was constructed for Ne-28 and the negative-parity states were identified for the first time. The results indicate a breakdown of the N = 20 and N = 28 shell gaps, presenting a challenge for theoretical description of the transition in the Ne isotopic chain.
Article
Physics, Nuclear
T. Tanaka, D. J. Hinde, M. Dasgupta, E. Williams, K. Vo-Phuoc, C. Simenel, E. C. Simpson, D. Y. Jeung, I. P. Carter, K. J. Cook, N. R. Lobanov, D. H. Luong, C. Palshetkar, D. C. Rafferty, K. Ramachandran
Summary: The angular momentum dependence of the reaction dynamics in quasifission was investigated, and the mass evolution of fission fragments in the reaction was determined. By measuring the mass and angular distributions of the reaction products Cr-52 + Pt-198 and Cr-54 + Pt-196, and comparing them with quasifission simulation results, it was found that the mass angle distributions could be well reproduced using a new quasifission mass evolution model. The yield of the component associated with low angular momentum increases with higher beam energy, suggesting the need for extra-push energy to achieve fusion.
Article
Physics, Nuclear
H. L. Crawford, M. D. Jones, A. O. Macchiavelli, P. Fallon, D. Bazin, P. C. Bender, B. A. Brown, C. M. Campbell, R. M. Clark, M. Cromaz, B. Elman, A. Gade, J. D. Holt, R. V. F. Janssens, I. Y. Lee, B. Longfellow, S. Paschalis, M. Petri, A. L. Richard, M. Salathe, J. A. Tostevin, D. Weisshaar
Summary: The 9Be(25F(5/2+), 24O)X proton-removal reaction was studied, and it was found that the proton d5/2 strength in the ground-state to ground-state transition is significantly depleted compared to shell-model expectations. The experimental data can be well explained within the framework of the Particle-Vibration Coupling (PVC) model, suggesting the presence of a quadrupole phonon in the effective 24O* core.
Article
Physics, Nuclear
D. J. Hinde, R. du Rietz, D. Y. Jeung, K. J. Cook, M. Dasgupta, E. C. Simpson, R. G. Thomas, M. Evers, C. J. Lin, D. H. Luong, L. R. Gasques, R. Rafiei, A. Wakhle, C. Simenel
Summary: Quantifying the role of quantum shells in quasifission dynamics is important for understanding superheavy element synthesis reactions. Previous studies have observed a wide peak in reactions with actinide nuclides, which is generally attributed to the spherical closed shells of 208Pb. However, an early experiment showed that sequential fission also plays a significant role in generating the observed peak. This study aims to measure quasifission mass spectra for reactions with lighter nuclei to search for systematic features correlated with proton shells.
Article
Physics, Nuclear
S. Uthayakumaar, M. A. Bentley, E. C. Simpson, T. Haylett, R. Yajzey, S. M. Lenzi, W. Satula, D. Bazin, J. Belarge, P. C. Bender, P. J. Davies, B. Elman, A. Gade, H. Iwasaki, D. Kahl, N. Kobayashi, B. Longfellow, S. J. Lonsdale, E. Lunderberg, L. Morris, D. R. Napoli, T. G. Parry, X. Pereira-Lopez, F. Recchia, J. A. Tostevin, R. Wadsworth, D. Weisshaar
Summary: Level schemes of the proton-rich nuclei Mn-47 and Cr-45 have been established for the first time. Mirror energy differences between mirrored states were studied and interpreted using different approaches. The coexistence of spherical and deformed structures near the ground state in Cr-45 provides a stringent test for model predictions.
Article
Physics, Nuclear
A. C. Berriman, D. J. Hinde, D. Y. Jeung, M. Dasgupta, H. Haba, T. Tanaka, K. Banerjee, T. Banerjee, L. T. Bezzina, J. Buete, K. J. Cook, S. Parker-Steele, C. Sengup, C. Simenel, E. C. Simpson, M. A. Stoyer, B. M. A. Swinton-Bland, E. Williams
Summary: The relative probabilities of the standard I and standard II modes and their bifurcation near threshold were investigated for the p + Th-232 reaction. The results indicate that the standard II mode has a lower fission barrier than the standard I mode in Pa-233, and the relative probability of the standard I mode increases continually above its barrier energy. Multichance fission, especially last chance fission, plays a strong role in determining the observed energy dependence of all fission modes.
Article
Physics, Nuclear
N. Kitamura, K. Wimmer, T. Miyagi, A. Poves, N. Shimizu, J. A. Tostevin, V. M. Bader, C. Bancroft, D. Barofsky, T. Baugher, D. Bazin, J. S. Berryman, V Bildstein, A. Gade, N. Imai, T. Kroell, C. Langer, J. Lloyd, E. Lunderberg, F. Nowacki, G. Perdikakis, F. Recchia, T. Redpath, S. Saenz, D. Smalley, S. R. Stroberg, Y. Utsuno, D. Weisshaar, A. Westerberg
Summary: This study aims to extend the level scheme of 32Mg, provide spin-parity assignments to excited states, and discuss the microscopic structure of each state through comparisons with theoretical calculations. The experimental results revealed a significantly updated level scheme for 32Mg, with negative-parity intruder and positive-parity normal states, and were confronted with four different nuclear structure models. However, unexplained discrepancies remain, and the structure of this key nucleus is not yet fully captured even with state-of-the-art theoretical approaches.
Article
Physics, Nuclear
A. N. Kuchera, D. Bazin, T. Phan, J. A. Tostevin, M. Babo, T. Baumann, P. C. Bender, M. Bowry, J. Bradt, J. Brown, P. A. DeYoung, B. Elman, J. E. Finck, A. Gade, G. F. Grinyer, M. D. Jones, B. Longfellow, E. Lunderberg, T. H. Redpath, W. F. Rogers, K. Stiefe, M. Thoennessen, D. Votaw, D. Weisshaar, K. Whitmore, R. B. Wiringa
Summary: This study investigates nucleon removal reactions and validates the models used to calculate the removal reaction cross sections. Three different nucleon removal reactions were performed and the partial cross sections to individual final states were determined by detecting the residual nuclei in coincidence with gamma rays. Comparison between measured and calculated cross sections reveals that the theoretical description of the removal process is in better agreement with the data when removing weakly bound nucleons.
Article
Physics, Nuclear
M. Holl, S. Lindberg, A. Heinz, Y. Kondo, T. Nakamura, J. A. Tostevin, H. Wang, T. Nilsson, N. L. Achouri, H. Al Falou, L. Atar, T. Aumann, H. Baba, K. Boretzky, C. Caesar, D. Calvet, H. Chae, N. Chiga, A. Corsi, H. L. Crawford, F. Delaunay, A. Delbart, Q. Deshayes, P. Diaz Fernandez, Z. Dombradi, C. A. Douma, Z. Elekes, P. Fallon, I Gasparic, J-M Gheller, J. Gibelin, A. Gillibert, M. N. Harakeh, A. Hirayama, C. R. Hoffman, A. Horvat, A. Horvath, J. W. Hwang, T. Isobe, J. Kahlbow, N. Kalantar-Nayestanaki, S. Kawase, S. Kim, K. Kisamori, T. Kobayashi, D. Koerper, S. Koyama, I Kuti, V Lapoux, F. M. Marques, S. Masuoka, J. Mayer, K. Miki, T. Murakami, M. Najafi, K. Nakano, N. Nakatsuka, A. Obertelli, F. de Oliveira Santos, N. A. Orr, H. Otsu, T. Ozaki, V Panin, S. Paschalis, A. Revel, D. Rossi, A. T. Saito, T. Y. Saito, M. Sasano, H. Sato, Y. Satou, H. Scheit, F. Schindler, P. Schrock, M. Shikata, Y. Shimizu, H. Simon, D. Sohler, O. Sorlin, L. Stuhl, S. Takeuchi, M. Tanaka, M. Thoennessen, H. Toernqvist, Y. Togano, T. Tomai, J. Tscheuschner, J. Tsubota, T. Uesaka, Z. Yang, M. Yasuda, K. Yoneda
Summary: In this study, the unbound states of Ne-29 were investigated for the first time. Through analyzing resonance properties, partial cross sections, and momentum distributions, some important conclusions were drawn, including the first evidence for f(7/2) single particle strength in Ne-29.
