Results 71 to 80 of about 12,068,996 (359)
Isotope effects and Alfvén eigenmode stability in JET H, D, T, DT, and He plasmas
Nuclear FusionWhile much about Alfvén eigenmode (AE) stability has been explored in previous and current tokamaks, open questions remain for future burning plasma experiments, especially regarding exact stability threshold conditions and related isotope effects; the ...
R.A. Tinguely +9 more
doaj +1 more source
Unusual temperature dependence of the oxygen-isotope effect on the exchange-energy of $La_{1-x}Ca_xMnO_3$ at high temperatures [PDF]
, 2008 We report magnetic susceptibility $\chi(T)$ measurements on oxygen-isotope exchanged La$_{1-x}$Ca$_{x}$MnO$_{3+y}$ up to 700 K. The $1/\chi(T)$ data show that the ferromagnetic exchange-energy $J$ depends strongly on the oxygen-isotope mass. The isotope effect on $J$ decreases with temperature up to 400 K and then increases again with temperature above
arxiv +1 more source
Deformation effects on the surface neutron densities of stable S and Ni isotopes probed by proton elastic scattering via isotopic analysis [PDF]
arXiv, 2022 To extract structure information from proton elastic scattering off S isotopes at 320 MeV and Ni isotopes at $E_p=180$ MeV, this study proposes isotopic analyses combining nuclear structure and reaction calculations. The isotonic analysis was repeated on $^{48}$Ca and $^{50}$Ti.
arxiv
On the frequency and isotope effect in sonochemistry
Ultrasonics Sonochemistry, 1997 In the first part of the work, it was observed, by a relative method, that the Weissler reaction and the Br2-catalysed isomerisation of maleic acid into fumaric acid are faster at 20 kHz than at 1.7 MHz. The difference between the relative reaction rates can be considered as small when the two order magnitude difference between the two frequencies is ...
Dekerckheer, Catherine +2 more
openaire +3 more sources
Designing of Self‐Dispersing Soft Dendritic Microcleaners for Microplastics Capture and Recovery
Advanced Functional Materials, EarlyView.The capture and recovery of microplastics from open aquatic systems is a complex problem, which necessitates nontrivial solutions. The principles of a comprehensive multistage process based on sustainably sourced microcleaners with hierarchical morphology are demonstrated.
Haeleen Hong +3 more
wiley +1 more source
Dependence between the photochemical age of light aromatic hydrocarbons and the carbon isotope ratios of atmospheric nitrophenols [PDF]
Atmospheric Chemistry and Physics, 2019 Concepts were developed to establish relationships between the stable carbon isotope ratios of nitrophenols in the atmosphere and the photochemical processing of their precursors, light aromatic volatile organic compounds.
M. Saccon +3 more
doaj +1 more source
Yankuang ceshi, 2021 BACKGROUND Tracing the source of polycyclic aromatic hydrocarbons (PAHs) by the compound-specific carbon isotope is becoming increasingly popular. For precise carbon isotope analysis, a pretreatment process is required to reduce co-outflow and unresolved
XIE Man-man +4 more
doaj +1 more source
Isotope effect in superconductors with coexisting interactions of phonon and nonphonon mechanisms [PDF]
J. Phys. Soc. Jpn. Vol.72, No.8 (2003) pp.1851-1854., 2003 We examine the isotope effect of superconductivity in systems with coexisting interactions of phonon and nonphonon mechanisms in addition to the direct Coulomb interaction. The interaction mediated by the spin fluctuations is discussed as an example of the nonphonon interaction. Extended formulas for the transition temperature Tc and the isotope-effect
arxiv +1 more source
Advanced Functional Materials, EarlyView.EuSc₂Te₄, an antiferromagnetic semiconductor, exhibits a nonlinear Hall effect (NLHE) characterized by quadratic current–voltage behavior. Combined experimental and theoretical studies reveal that this NLHE is linked to its antiferromagnetism and involves contributions from the quantum metric.
Seng Huat Lee +15 more
wiley +1 more source
Catalysis Communications, 2023 Isotopes are indispensable tools for elucidating catalytic reaction mechanisms. Yet, computational isotopic studies in heterogeneous catalysis remain scarce, especially when compared with other subfields of chemistry.
Benjamin W.J. Chen
doaj