Article
Materials Science, Multidisciplinary
Shingo Tagami, Tomotsugu Wakasa, Masanobu Yahiro
Summary: In this study, matter radii and neutron-skin thickness were determined from reaction cross sections of proton scattering on different targets. The results were consistent with previous experiments and provided valuable information on the matter radii of nickel isotopes.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Tomotsugu Wakasa, Maya Takechi, Shingo Tagami, Masanobu Yahiro
Summary: This study aims to determine the matter radius and skin thickness of He-6 and He-8 by using experimental data and a folding model. The results are consistent with previous studies and reveal the distance between 4 He nuclei and the center of mass of valence electrons in He-8.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Tomotsugu Wakasa, Shingo Tagami, Masanobu Yahiro
Summary: The article discusses the reports on skin values by the PREX and CREX groups, and analyzes the experimental results using the Love-Franey matrix folding model. The study finds that the scattering data can be reproduced within a specific energy range, and provides information about neutron and proton radii.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Shingo Tagami, Tomotsugu Wakasa, Masanobu Yahiro
Summary: The neutron-skin thicknesses of Sb isotopes were measured, and a chiral g-matrix folding model was used to determine the reaction cross sections. The results were found to be consistent with previous values.
RESULTS IN PHYSICS
(2023)
Article
Astronomy & Astrophysics
R. Silwal, C. Andreoiu, B. Ashrafkhani, J. Bergmann, T. Brunner, J. Cardona, K. Dietrich, E. Dunling, G. Gwinner, Z. Hockenbery, J. D. Holt, C. Izzo, A. Jacobs, A. Javaji, B. Kootte, Y. Lan, D. Lunney, E. M. Lykiardopoulou, T. Miyagi, M. Mougeot, I Mukul, T. Murbock, W. S. Porter, M. Reiter, J. Ringuette, J. Dilling, A. A. Kwiatkowski
Summary: Mass measurements provide valuable information for understanding nuclear structure and astrophysics. High-precision mass measurements of neutron-rich chromium isotopes confirm previous results and refine the understanding of nuclear deformation and collectivity.
Article
Physics, Nuclear
Jie Liu, Huaiyong Bai, Haoyu Jiang, Guohui Zhang
Summary: By re-analyzing previous measurement data, the ratios of the differential and angle-integrated cross sections for the B-10(n, alpha)Li-7 reaction to the Li-6(n, t)He-4 reaction were obtained. The results have smaller uncertainties and cover a wide range of neutron energy, making them useful for improving neutron cross section standards. The normalized ratios are in good agreement with the evaluation data in the ENDF/B-VIII.0 and JEFF-3.3 libraries. However, further measurements with higher precision are needed, especially in the higher neutron energy region.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Astronomy & Astrophysics
G. G. Kiss, T. N. Szegedi, P. Mohr, M. Jacobi, Gy. Gyurky, R. Huszank, A. Arcones
Summary: The text discusses the formation of lighter heavy elements beyond iron and up to around silver in core-collapse supernovae and neutron star mergers, as well as the importance of α+n reactions in the weak r-process. It presents a statistical model for calculating reaction rates and identifies the main uncertainty at relevant energies. The Zr-96(α,n)Mo-99 reaction is highlighted as a key reaction impacting the production of elements from Ru to Cd, with the first cross section measurement presented for testing various model predictions.
ASTROPHYSICAL JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Tianlin Liu, Sarah N. Elliott, Meijun Zou, Michael F. Vansco, Christopher A. Sojdak, Charles R. Markus, Raybel Almeida, Kendrew Au, Leonid Sheps, David L. Osborn, Frank A. F. Winiberg, Carl J. Percival, Craig A. Taatjes, Rebecca L. Caravan, Stephen J. Klippenstein, Marsha I. Lester
Summary: Alkene ozonolysis generates short-lived Criegee intermediates, which are a significant source of hydroxyl radicals. This study demonstrates that roaming of the separating OH radicals can yield alternate hydroxycarbonyl products, thereby reducing the OH yield. Specifically, hydroxybutanone has been detected as a stable product arising from roaming in the unimolecular decay of certain Criegee intermediates. The mechanism of hydroxybutanone formation has been investigated through theoretical calculations and experimental methods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Tianlin Liu, Sarah N. Elliott, Meijun Zou, Michael F. Vansco, Christopher A. Sojdak, Charles R. Markus, Raybel Almeida, Kendrew Au, Leonid Sheps, David L. Osborn, Frank A. F. Winiberg, Carl J. Percival, Craig A. Taatjes, Rebecca L. Caravan, Stephen J. Klippenstein, Marsha I. Lester
Summary: Alkene ozonolysis can produce Criegee intermediates, which are important sources of hydroxyl radicals. This study shows that the roaming of separating hydroxyl radicals can result in the formation of alternate hydroxycarbonyl products, leading to a reduction in the yield of hydroxyl radicals. Experimental and theoretical analyses demonstrate that hydroxybutanone is a stable product formed from the roaming of the methyl-ethyl-substituted Criegee intermediate (MECI), and the dynamics of the multistage dissociation process have been investigated.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Physics, Nuclear
E. Sansarbayar, Yu M. Gledenov, I Chuprakov, G. Khuukhenkhuu, G. S. Ahmadov, L. Krupa, Guohui Zhang, Haoyu Jiang, Zengqi Cui, Yiwei Hu, Jie Liu, N. Battsooj, I Wilhelm, M. Solar, R. Sykora, Z. Kohout
Summary: Cross sections for the 35Cl(n, alpha) 32P reaction were systematically measured at incident neutron energies in the range of 3.3 to 5.3 MeV using an experiment carried out in Russia. The data obtained were compared with existing experimental data and theoretical calculations, aiming to clarify discrepancies in the nuclear data.
Article
Environmental Sciences
Kaihui Zhao, Yonghua Wu, Jianping Huang, Guillaume Gronoff, Timothy A. Berkoff, Mark Arend, Fred Moshary
Summary: Collaborative observations during the 2018 LIS Tropospheric O3 Study (LISTOS) reveal that regional transport and local chemical reactions are the two key driving factors behind summertime ozone pollution in Long Island Sound (LIS). The study also highlights the significant contribution of air mass transport from New York City (NOx-enriched) through regional transport to the ozone exceedance events in LIS. This research provides scientific evidence to understand the key processes governing ozone pollution over LIS and similar coastal areas, and can aid in improving emission control strategies to meet ambient ozone standards.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Mustafa Yig
Summary: A new empirical systematic was proposed to predict (n, 2p) cross sections. The formula showed a good fit to predict the cross sections around 14 MeV, based on analysis and comparison with experimental data.
APPLIED RADIATION AND ISOTOPES
(2022)
Article
Chemistry, Analytical
W. Ali, M. Zeeshan, M. Hussain, H. Zaneb
Summary: In this study, the Cu-nat(p,x)Zn-65 and Cu-nat(d,x)Zn-65 reactions for beam monitoring were evaluated, comparing experimental data with nuclear model calculations. The results suggest that Cu-nat(p,x)Zn-65 process may be a preferred method for higher accuracy of beam monitoring in the energy range of 20 -> 93 MeV.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Astronomy & Astrophysics
Jie Liu, Zengqi Cui, Yiwei Hu, Haofan Bai, Zhenpeng Chen, Cong Xia, Tieshuan Fan, Jinxiang Chen, Guohui Zhang, Xichao Ruan, Hanxiong Huang, Jie Ren, Hongtao Chen
Summary: Using a single crystal chemical vapor deposited (sCVD) diamond detector as an active target, the cross sections of the C-12(n, n+3 alpha) and C-12(n, alpha(0))Be-9 reactions were measured simultaneously in the neutron energy region of 9.50 - 14.67 MeV. The results showed that the measurements of the C-12(n, alpha(0))Be-9 reaction were consistent with the latest measurement, confirming the reliability of this work.
Article
Chemistry, Physical
Adrien Marjollet, Ralph Welsch
Summary: A new method combining QCT and ring polymer molecular dynamics has been proposed to calculate state-selective cross sections with quantum effects, showing good agreement with rigorous quantum dynamics simulations for most cases. The approach demonstrates encouraging improvement over QCT results for specific cases at only a small increase in numerical cost.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2021)
Article
Nuclear Science & Technology
Hong-Wei Wang, Gong-Tao Fan, Long-Xiang Liu, Hang-Hua Xu, Wen-Qing Shen, Yu-Gang Ma, Hiroaki Utsunomiya, Long-Long Song, Xi-Guang Cao, Zi-Rui Hao, Kai-Jie Chen, Sheng Jin, Yu-Xuan Yang, Xin-Rong Hu, Xin-Xiang Li, Pan Kuang
Summary: SLEGS is an important gamma-ray source in the Shanghai Synchrotron Radiation Facility, capable of producing energy-tunable quasi-monoenergetic gamma-ray beams.
NUCLEAR SCIENCE AND TECHNIQUES
(2022)
Editorial Material
Nuclear Science & Technology
Yu-Gang Ma
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Mathematics, Applied
Zhuoran Chen, Chao Yang, Jiang-Hai Qian, Dingding Han, Yu-Gang Ma
Summary: This paper introduces a recursive traffic percolation framework to model cascading failures and analyze potential bottlenecks. Unlike previous work, it considers the influence of external flow, providing a novel perspective on regional commuting. An empirical study is conducted to validate the accuracy and effectiveness of the proposed framework, revealing that external flows from different regions impact the network. Our work only requires primary data and verifies the enhancement of the functional network.
Article
Mathematics, Interdisciplinary Applications
Jiang-Hai Qian, Qi-Jia Liao, Jing Xu, Han-Yun Chang, Ding-Ding Han, Yu-Gang Ma
Summary: We study a network model in which the spatial constraint changes with the network growth and find that the dynamic constraint generally leads to a non-stationary multiple scaling law in degree distribution. Specifically, we demonstrate the successive emergence of different power-law segments during the network evolution, from a single power law at the beginning to a double one and to more scaling laws due to the model setting. Our findings suggest a plausible geometric origin of the double power-law distribution and predict its non-stationary nature accompanied by its emergence, which are supported by our empirical study on the Chinese airline network.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Nuclear Science & Technology
Kai-Jie Chen, Long-Xiang Liu, Zi-Rui Hao, Yu-Gang Ma, Hong-Wei Wang, Gong-Tao Fan, Xi-Guang Cao, Hang-Hua Xu, Yi-Fei Niu, Xin-Xiang Li, Xin-Rong Hu, Yu-Xuan Yang, Sheng Jin, Pan Kuang
Summary: The Shanghai laser electron gamma source (SLEGS) is used to study photonuclear physics, particularly giant dipole resonance (GDR) and pygmy dipole resonance. The SLEGS neutron time-of-flight (TOF) spectrometer aims to measure GDR and specific nuclear structures above the neutron threshold. Geant4 simulation was used to determine detector efficiency and layout for the TOF spectrometer. Offline experiments evaluated the performance, with a time resolution of approximately 0.9 ns.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Review
Nuclear Science & Technology
Wan-Bing He, Yu-Gang Ma, Long-Gang Pang, Hui-Chao Song, Kai Zhou
Summary: Although seemingly unrelated, high-energy nuclear physics (HENP) and machine learning (ML) have recently started to merge, leading to interesting outcomes. The application of ML in HENP can offer a novel approach and broaden the understanding of this interdisciplinary field. This mini-review aims to inform the community about the current status and provide an overview of ML's application in HENP.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Physics, Multidisciplinary
T. Pohl, Y. L. Sun, A. Obertelli, J. Lee, M. Gomez-Ramos, K. Ogata, K. Yoshida, B. S. Cai, C. X. Yuan, B. A. Brown, H. Baba, D. Beaumel, A. Corsi, J. Gibelin, A. Gillibert, K. I. Hahn, T. Isobe, Y. Kondo, T. Kobayashi, Y. Kubota, P. Li, P. Liang, H. N. Liu, J. Liu, T. Lokotko, F. M. Marques, Y. Matsuda, T. Motobayashi, T. Nakamura, N. A. Orr, H. Otsu, V. Panin, S. Y. Park, S. Sakaguchi, M. Sasano, H. Sato, H. Sakurai, Y. Shimizu, A. I. Stefanescu, L. Stuhl, D. Suzuki, T. Uesaka, H. Wang, X. Xu, Z. H. Yang, K. Yoneda, J. Zenihiro
Summary: We report on the first proton-induced single proton- and neutron-removal reactions from the neutron-deficient 14O nucleus with large Fermi-surface asymmetry Sn - Sp 1/4 18.6 MeV at similar to 100 MeV/nucleon, a widely used energy regime for rare-isotope studies. The measured inclusive cross sections and parallel momentum distributions of the 13N and 13O residues are compared to the state-of-the-art reaction models, with nuclear structure inputs from many-body shell-model calculations. Our results provide the first quantitative contributions of multiple reaction mechanisms including the quasifree knockout, inelastic scattering, and nucleon transfer processes. It is shown that the inelastic scattering and nucleon transfer are important tools for investigating single-particle strengths and correlations in atomic nuclei.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Rurie Mizuno, Megumi Niikura, Tokihiro Ikeda, Teiichiro Matsuzaki, Shintaro Go, Takeshi Y. Saito, Shin'ichiro Michimasa, Hiroyoshi Sakurai
Summary: The performance of germanium detectors for high-energy gamma-rays was evaluated. A 992-keV resonance in the Al-27(p, gamma)Si-28 reaction was used for the measurement at the RIKEN tandem accelerator. The energy of the excited state from the resonance was determined as 12540.7(2) keV. An energy calibration function and photo peak efficiency for Ge detectors up to 10.8-MeV photons were deduced using the newly determined excitation energy. The overall energy region achieved an energy accuracy of 0.3 keV. This reaction provides reliable energy and efficiency standards for high-energy gamma-rays.
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2023)
Editorial Material
Nuclear Science & Technology
Yu-Gang Ma
Summary: Directed flow (v(1)) of hypernuclei H-3 (Lambda) and H-4 (Lambda) is observed in mid-central Au+Au collisions at root s (NN) = 3 GeV at RHIC, providing a new possibility for studying hyperon-nucleon (Y-N) interaction under finite pressure. Additionally, multi-strangeness hypernuclei offer a venue to investigate hyperon-nucleon-nucleon (Y-N-N) and even hyperon-hyperon-nucleon (Y-Y-N) interactions. Hypernuclei play a crucial role in connecting nuclear collisions with the equation of state governing the inner structure of compact stars.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Physics, Multidisciplinary
S. M. Wang, W. Nazarewicz, A. Volya, Y. G. Ma
Summary: The most important law of radioactivity is the exponential decay law, which is, however, neither rigorous nor fundamental in the realm of quantum mechanics. While deviations from exponential decay have been observed experimentally at the early stage of decay, there is little evidence for nonexponential behavior at long times. Nonetheless, theoretically, long-term nonexponentiality is expected to reveal the nonresonant background components of the initial wave function and provide information about interference and memory. This paper proposes new observables for experimental investigations of the post-exponential decay regime, with examples in atomic nuclei, but applicable to other many-body open quantum systems.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Nuclear
Ling -Meng Fang, Yu -Gang Ma, Song Zhang
Summary: In this study, the collective flows of protons and deuterons in Au + Au collisions were simulated using an isospin-dependent quantum molecular dynamics model. The effects of naive coalescence and dynamical coalescence models on deuteron formation were compared. After achieving a reasonable agreement between the proton and deuteron rapidity spectra and the high acceptance dielectron spectrometer data, an event-plane method was used to calculate the first four order collective flow coefficients and the ratios of (v4)/(v2)2 and (v3)/((v1)(v2)), as well as studying the scaling of the number of constituent nucleons between protons and deuterons. Additionally, the dependence of en versus (vn) and the ratio (vn)/en on centrality was obtained. Finally, the Pearson coefficients corr(vn, vm) between the first four harmonic flows for protons and deuterons were investigated as a function of rapidity and centrality.
Article
Physics, Nuclear
Yu-Xuan Zhang, Song Zhang, Yu-Gang Ma
Summary: The study examines light nuclei to understand both the production mechanism and the interactions between nucleons and other particles in the medium. The ALICE Collaboration recently presented data on the transverse momentum spectra of deuterons in p-p collisions at vs = 13 TeV and p-Pb collisions at vs(NN) = 5.02 TeV. Using a multiphase transport model with a string melting mechanism and a coalescence afterburner, the study successfully reproduces the transverse momentum spectra of deuterons and obtains the conditional yields of deuterons and protons. According to the coalescence model, it is predicted that there is a scaling relationship between the conditional yield ratios of deuterons to protons and the inclusive yield ratios, similar to the constituent nucleon number scaling for elliptic flow. The study also foresees the possibility of near-side suppression in the correlation function, similar to two-baryon azimuthal correlations.
EUROPEAN PHYSICAL JOURNAL A
(2023)
Article
Physics, Nuclear
Ting -Ting Wang, Yu-Gang Ma, Song Zhang
Summary: In this study, momentum correlation functions of light (anti)nuclei in several central heavy-ion collision systems are calculated using the AMPT model and the Lednick and Lyuboshitz method. It is found that the emission source of light (anti)nuclei has a smaller space extent in more peripheral collisions. The correlation between the emission source size and the system size is also explored, and it is found to be self-consistent. Furthermore, the average emission sequence of nonidentical light nuclei pairs is inferred using momentum correlation functions gated on velocity, and it is observed that protons are emitted on average on a timescale similar to neutrons but earlier than deuterons or tritons, with a larger interval of the average emission order observed for smaller collision systems or more peripheral collisions.
Article
Physics, Nuclear
Rui Wang, Yu-Gang Ma, Lie-Wen Chen, Che Ming Ko, Kai-Jia Sun, Zhen Zhang
Summary: We develop a kinetic approach to study the production of light nuclei in intermediate-energy heavy-ion collisions. The conversions between nucleons and light nuclei and the Mott effect on light nuclei are included dynamically in our approach. Our study provides a reasonable description of the measured yields of light nuclei in central Au + Au collisions and indicates that the observed enhancement of alpha-particle yield at low incident energies can be attributed to a weaker Mott effect.
Article
Physics, Nuclear
Y. T. Cao, X. G. Deng, Y. G. Ma
Summary: Different alpha-cluster configurations in Ca-40 + O-16 collisions lead to different yields of light nuclei, and the magnitude hierarchy of geometric fluctuations is determined by the structure of O-16.
