Article
Nuclear Science & Technology
Abrar Hussain, Lihao Yang, Shifeng Mao, Bo Da, Karoly Tokesi, Z. J. Ding
Summary: An up-to-date Monte Carlo simulation was conducted to derive theoretical values of electron backscattering coefficient of beryllium, which were found to be significantly smaller than previously published experimental data. The simulation also confirmed that Auger electrons have negligible contribution to backscattering coefficient.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Geochemistry & Geophysics
Eric N. Carlson, Richard L. Hervig
Summary: Trace element analyses of silicate materials using SIMS normalize the ion count rate based on silicon isotopes, with Si+ being the most commonly used. However, using Si2+ or Si3+ as normalizing species may lead to larger matrix effects and inaccurate analyses. Calibrations using different normalizing species on synthetic basaltic glass and soda-lime silicate glass standards showed minimal matrix effects when using Si+, while larger effects were observed with Si2+ or Si3+. Normalizing the ion intensities to Al3+ showed smaller matrix effects than multiply-charged Si ions, and normalizing to O-16(+) resulted in distinct calibration curves, indicating a potential role of sputter yields in producing multiply charged silicon ions.
AMERICAN MINERALOGIST
(2023)
Article
Chemistry, Physical
Xiang Li, Jia-Cheng Huang, Guang-Ze Zhang, Hao-En Li, Chang-Su Cao, Dingshun Lv, Han-Shi Hu
Summary: This article introduces a general nonstochastic optimization algorithm for neural-network quantum states (NQS) in chemical systems. The algorithm accelerates the optimization process by bypassing the need for Markov-chain Monte Carlo within the variational Monte Carlo (VMC) framework, and it offers comparable or superior accuracy and convergence compared to its stochastic counterpart.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Engineering, Geological
Chao Zhao, Wenping Gong, Tianzheng Li, C. Hsein Juang, Huiming Tang, Hui Wang
Summary: Accurate characterization of subsurface stratigraphic configuration is crucial to geotechnical engineering work, but uncertainty can be significant due to complexity and limited data availability. This paper presents a method for characterizing subsurface stratigraphy with limited borehole data, demonstrating its effectiveness and advantages through comparative analyses and a case study in Western Australia.
ENGINEERING GEOLOGY
(2021)
Article
Biochemical Research Methods
Marisol Ibarra-Rodriguez, Mario Sanchez
Summary: In this study, the adsorption properties of boron, beryllium, and lithium clusters on graphitic carbon nitride were investigated using density functional theory calculations. The results show that these clusters exhibit characteristics of adsorbing styrene molecules, with the Be-4/g-C3N4 system showing better adsorption due to strong interactions with the aromatic ring of the styrene molecule.Natural bond orbital studies revealed a donation process from styrene molecules and the g-C3N4 sheet to boron, beryllium, and lithium clusters, with back donation observed in boron and beryllium clusters.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2021)
Article
Physics, Fluids & Plasmas
S. Dujko, J. Atic, D. Bosnjakovic, R. D. White, P. Stokes, K. R. Hamilton, O. Zatsarinny, K. Bartschat, M. S. Rabasovic, D. Sevic, B. P. Marinkovic, D. Fursa, I Bray, R. P. McEachran, F. Blanco, G. Garcia, D. B. Jones, L. Campbell, M. J. Brunger
Summary: The study investigates the transport of electrons and propagation of negative ionisation fronts in indium vapour, revealing that the spatial relaxation of electrons is sensitive to the indium vapor temperature and initial conditions. The presence of indium atoms significantly affects the characteristics of the negative ionisation fronts in the vapor.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Review
Geochemistry & Geophysics
Chen Liu, Ru-Cheng Wang, Robert L. Linnen, Fu-Yuan Wu, Lei Xie, Xiao-Chi Liu
Summary: Continuous beryl mineralization was discovered in the leucogranite pluton of the Himalayas, with significantly higher beryllium concentrations compared to typical granites worldwide. The gneisses of the Greater Himalayan System also contain higher beryllium abundance. This study suggests that the enrichment of critical elements is not only influenced by fractional crystallization, but also by the saturation phase, such as beryl, which buffers the concentration of critical elements in the melt.
AMERICAN MINERALOGIST
(2023)
Article
Energy & Fuels
Christian Castagna, Erez Gilad
Summary: This paper presents an in-depth uncertainty analysis on the nuclide inventory calculations, considering the nonlinear feedback due to deviation from the critical boron concentration during calculation. The results indicate that deviation from the critical boron concentration may lead to significant discrepancies in nuclide densities during the irradiation cycle.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Biomedical
M. McManus, F. Romano, G. Royle, D. Botnariuc, D. Shipley, H. Palmans, A. Subiel
Summary: A detailed characterization of the Roos secondary standard plane-parallel ionization chamber was conducted in a novel 200 MeV Very High Energy Electron (VHEE) beam, with reference to the standard 12 MeV electron calibration beam used in experimental work. Stopping-power ratios, perturbation factors, and beam quality correction factor were determined and calculated using the Geant4 MC code. The results showed good agreement between the 12 MeV electron calibration beam and current dosimetry protocols, while the VHEE beam had lower variations. The beam quality correction factors were found to reduce the calculated dose by approximately 10%.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Geochemistry & Geophysics
Martin Kutzschbach, Bernd Wunder, Iris Wannhoff, Franziska D. H. Wilke, Frederic Couffignal, Alexander Rocholl
Summary: Raman spectroscopy analysis of synthesized tourmalines revealed a correlation between tetrahedral boron content and OH-stretching band intensity, demonstrating its utility as a tool for quantifying tetrahedral boron in tourmaline. This knowledge is crucial for understanding B-isotope fractionation processes between tourmaline and fluid/melt, commonly used as a tracer for mass transfer processes.
AMERICAN MINERALOGIST
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Henry J. Meyer, Uwe Titt, Radhe Mohan
Summary: Monte Carlo simulations showed that the dose delivered by alpha particles from the p + B-11 -> 3 alpha reaction was much lower than the dose delivered by protons directly. Therefore, it is concluded that the enhanced biological effectiveness of proton-boron fusion therapy is not due to an alpha particle-based mechanism.
Article
Nuclear Science & Technology
Bo-Wi Cheon, Dohyeon Yoo, Hyojun Park, Hyun Cheol Lee, Wook-Geun Shin, Hyun Joon Choi, Bong Hwan Hong, Heejun Chung, Chul Hee Min
Summary: This study optimized the target, moderator, and collimator in a neutron beam generator for the A-BNCT system using MCNP simulation. The optimized TMC met IAEA recommendations and can be used as a reference for shielding designs in treatment rooms.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Physics, Applied
A. Longo, B. Notebaert, A. Chevillot, M. Gaceur, R. Messina, A. Durnez, T. Baptiste, C. Dupuis, A. Madouri, N. Battaglini, S. Ammar
Summary: By exploiting the configuration of an alternate-current thin-film electroluminescent device, we achieved light emission through a mechanism of local charge creation and transport, paving the way for cost-effective deposition methods for the active layer and providing insights for the development of non-toxic quantum-dot-based displays.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Environmental Sciences
Elham Ramin, Xavier Flores-Alsina, Chris Gaszynski, Theo Harding, David Ikumi, Chris Brouckaert, Barbara Brouckaert, David Modiri, Resul Al, Gurkan Sin, Krist Gernaey
Summary: This study evaluated four different wastewater treatment system configurations based on a model, finding that UCT and UCTM are more suitable for phosphorus removal, but denitrification is incomplete. Different configurations affect how influent uncertainty is reflected in effluent quality and cost performance model predictions, as well as the parameter rankings for effluent phosphate, sludge disposal, and methane production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Mechanical
Wenxin Zhang, Bao Zhu
Summary: This study focuses on the hydrophobic surface sliding bearing, utilizing a nonlinear limiting shear stress model and efficient Monte Carlo search for simulation and optimization. Results validate the method and examine the impact of aspect ratios on optimal configuration.
TRIBOLOGY INTERNATIONAL
(2023)