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Ion
About: Ion is a research topic. Over the lifetime, 107590 publications have been published within this topic receiving 2004746 citations.
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TL;DR: In this article, a nonperturbative many electron theory of atom resonance ionization and ion resonance neutralization at a metal surface is presented and the problem of the ion yield in SIMS experiments is dealt with.
48 citations
TL;DR: In this article, the nature of ion diffusivity in the vitreous conductor 2Ca NO3 2? 3KNO3 (CKN) was studied by nonresonant dielectric hole burning.
Abstract: The nature of ion diffusivity in the vitreous conductor 2Ca NO3 2 ? 3KNO3 (CKN) was studied by nonresonant dielectric hole burning. Spectral holes in the electric field relaxation are probed subsequent to a high electric sinusoidal burn field. For sufficiently high pump frequencies we are able to induce spectrally selective modifications in the relaxation of the electric modulus, indicating that ionic diffusivity is a spatially varying quantity in glassy CKN. Homogeneous behavior occurs in the regime of low pump frequencies, in which the resistivity approaches its steady state value. Thus, longer-ranged ionic motions lead to a spatial averaging over the heterogeneity of local ion diffusivities.
48 citations
TL;DR: In this article, a first-order difference method with chlorine isotopes substitution was used to derive the Cl−−dependent partial structure factors and radial distribution functions and oscillation patterns of all Cl−related structure factors normalized by the concentration persist up to the high momentum transfer region (∼10 A−1), suggesting the presence of the short-range ordering around chloride ion in the three solvent systems.
Abstract: Pulsed neutron diffraction measurements have been carried out on 8.6, 5.8, and 1.7 molar lithium chloride (LiCl) solutions in deuterated water (D2O), methanol‐d4 (MeOD), and N,N‐dimethylformamide‐d7 (DMF), respectively. A first‐order difference method with chlorine isotopes substitution was used to derive the Cl−‐dependent partial structure factors and radial distribution functions. The oscillation patterns of all Cl−‐related structure factors normalized by the concentration persist up to the high momentum transfer region (∼10 A−1), suggesting the presence of the short‐range ordering around chloride ion in the three solvent systems. The normalized radial distribution functions have revealed that methanol molecules are hydrogen bonded to a chloride ion with almost linear orientation of Cl⋅⋅⋅D–O, as in the case of chloride hydration. The nearest‐neighbor Cl–D distance and the solvation number for Cl− in the methanol solutions were determined as 2.21±0.03 A and 3.6±0.5, respectively, compared with 2.29±0.01 ...
48 citations
48 citations
TL;DR: Guo et al. as discussed by the authors studied the power absorption of high-frequency electromagnetic waves in a uniformly magnetized plasma layer covering a highly conducting surface under atmosphere conditions, and showed that the existence of negative ions greatly reduces the total power absorption, while the magnetization of the plasma can, however, partially enhance it.
Abstract: Power absorption of high-frequency electromagnetic waves in a uniformly magnetized plasma layer covering a highly conducting surface is studied under atmosphere conditions. It is assumed that the system consists of not only electrons and positive ions but negative ions as well. By a general formula derived in our previous work [B. Guo and X. G. Wang, Plasma Sci. Tech. 7, 2645 (2005)], the total power absorption in the plasma layer with multiple reflections between an air-plasma interface and the conducting surface is computed. The results show that although the existence of negative ions greatly reduces the total power absorption, the magnetization of the plasma can, however, partially enhance it. Parameter dependence of the effects is calculated and discussed.
48 citations