Charge exchange
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Free and Bound States of Ions in Ionic Liquids, Conductivity, and Underscreening Paradox Open
See Supplemental Material at http://link.aps.org/supplemental/10.1103/PhysRevX.9.021024 for (1) comparison of results for the temperature-dependent percentage of free ions obtained by three different methods; \n(2) detailed study of the ki…
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Heavy-ion double-charge-exchange and its relation to neutrinoless double- decay Open
We introduce the formalism to describe heavy-ion Double-Charge-Exchange (DCE) processes in the eikonal approximation. We focus on the low-momentum-transfer limit -- corresponding to the differential cross section at $\theta=0^\circ$ -- and…
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Improved edge charge exchange recombination spectroscopy in DIII-D Open
The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a > 0.8). The additional views are diagnosed with…
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Plasma code for astrophysical charge exchange emission at X-ray wavelengths Open
Charge exchange X-ray emission provides unique insights into the interactions\nbetween cold and hot astrophysical plasmas. Besides its own profound science,\nthis emission is also technically crucial to all observations in the X-ray\nband,…
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Theory of single-charge exchange heavy-ion reactions Open
The theory of heavy ion single charge exchange reactions is reformulated. In\nmomentum space the reaction amplitude factorizes into a product of projectile\nand target transition form factors, folded with the nucleon-nucleon isovector\nint…
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Charge exchange recombination spectroscopy at Wendelstein 7-X Open
The Charge Exchange Recombination Spectroscopy (CXRS) diagnostic has become a routine diagnostic on almost all major high temperature fusion experimental devices. For the optimized stellarator Wendelstein 7-X (W7-X), a highly flexible and …
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Line Ratios for Solar Wind Charge Exchange with Comets Open
Charge exchange (CX) has emerged in X-ray emission modeling as a significant process that must be considered in many astrophysical environments—particularly comets. Comets host an interaction between solar wind ions and cometary neutrals t…
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PyAtomDB: Extending the AtomDB Atomic Database to Model New Plasma Processes and Uncertainties Open
The AtomDB project provides models of X-ray and extreme ultraviolet emitting astrophysical spectra for optically thin, hot plasma. We present the new software package, PyAtomDB, which now underpins the entire project, providing access to t…
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Effectiveness of an RbF Post Deposition Treatment of CIGS Solar Cells in Dependence on the Cu Content of the Absorber Layer Open
In this contribution, the effectiveness of an RbF post deposition treatment (PDT) is evaluated in dependence on the Cu content of the absorber layer of Cu(In,Ga)Se 2 solar cells. It is shown that the PDT only acts beneficially on the open-…
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A Constrained Analysis of the 40Ca(18O,18F)40K Direct Charge Exchange Reaction Mechanism at 275 MeV Open
The 40 Ca( 18 O, 18 F) 40 K single charge exchange (SCE) reaction is explored at an incident energy of 275 MeV and analyzed consistently by collecting the elastic scattering and inelastic scattering data under the same experimental conditi…
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Direct Exchange Mechanism for Interlayer Ions in Non-Swelling Clays Open
The mobility of radiocesium in the environment is largely mediated by cation exchange in micaceous clays, in particular Illite-a non-swelling clay mineral that naturally contains interlayer K+ and has high affinity for Cs+. Although exchan…
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Two-step description of heavy ion double charge exchange reactions Open
Heavy ion double charge exchange reactions are described by sequential meson-exchange, corresponding to a double single charge exchange (DSCE) reaction mechanism. The theoretical formulation is discussed. The fully quantum mechanical disto…
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Precise determination of charge-dependent pion-nucleon-nucleon coupling constants Open
We undertake a covariance error analysis of the pion-nucleon-nucleon coupling constants from the Granada-2013 np and pp database comprising a total of 6720 scattering data below LAB energy of 350 MeV. Assuming a unique pion-nucleon couplin…
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The atmosphere of comet 67P/Churyumov-Gerasimenko diagnosed by charge-exchanged solar wind alpha particles Open
Context. The ESA/Rosetta mission has been orbiting comet 67P/Churyumov-Gerasimenko since August 2014, measuring its dayside plasma environment. The ion spectrometer onboard Rosetta has detected two ion populations, one energetic with a sol…
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Instrumentation for the upgrade to the JET core charge-exchange spectrometers Open
Charge-exchange spectroscopy on JET has become particularly challenging with the introduction of the ITER-like wall. The line intensities are weaker and contaminated by many nuisance lines. We have therefore upgraded the instrumentation to…
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Temperature Dependence of Charge and Spin Transfer in Azurin Open
The steady-state charge and spin transfer yields were measured for three different Ru-modified azurin derivatives in protein films on silver electrodes. While the charge-transfer yields exhibit weak temperature dependences, consistent with…
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Unraveling energy loss processes of low energy heavy ions in 2D materials Open
Structuring of 2D materials and their heterostructures with ion beams is a challenging task, because typically low ion energies are needed to avoid damage to a substrate. In addition, at the very first monolayers of a material, ions are no…
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Unveiling the Physics Behind Hybrid Functionals Open
We show that accurate exchange-correlation hybrid functionals give very physically optimized effective-correlation potentials, capable of correctly describing the quantum oscillations of atoms and molecules. Based on this analysis and on u…
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Machine Learning‐Aided Design of Highly Conductive Anion Exchange Membranes for Fuel Cells and Water Electrolyzers Open
Alkaline anion exchange membrane (AEM)‐based fuel cells (AEMFCs) and water electrolyzers (AEMWEs) are vital for enabling the efficient and large‐scale utilization of hydrogen energy. However, the performance of such energy devices is imped…
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Coupling charge-exchange vibrations to nucleons in a relativistic framework: Effect on Gamow-Teller transitions and β-decay half-lives Open
The nuclear response theory for isospin-transfer modes in the relativistic\nparticle-vibration coupling framework is extended to include coupling of single\nnucleons to isospin-flip (charge-exchange) phonons, in addition to the usual\nneut…
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Directional Bonding in Decaniobate Inorganic Frameworks Open
Metal–oxo clusters offer an opportunity to assemble inorganic and metal–organic frameworks (MOFs) by a controlled building‐block approach, which led to the revolutionary discoveries of zeolites and MOFs. Polyoxometalate clusters are solubl…
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Solar wind charge exchange in cometary atmospheres Open
Context. Solar wind charge-changing reactions are of paramount importance to the physico-chemistry of the atmosphere of a comet. The ESA/Rosetta mission to comet 67P/Churyumov-Gerasimenko (67P) provides a unique opportunity to study charge…
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Dynamic Response of an Electron Gas: Towards the Exact Exchange-Correlation Kernel Open
Precise calculations of dynamics in the homogeneous electron gas (jellium model) are of fundamental importance for design and characterization of new materials. We introduce a diagrammatic Monte Carlo technique based on algorithmic Matsuba…
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Can long-range nuclear properties Be influenced by short range interactions? A chiral dynamics estimate Open
Recent experiments and many-body calculations indicate that approximately 20% of the nucleons in medium and heavy nuclei (A ≥12) are part of short-range correlated (SRC) primarily neutron-proton (np) pairs. We find that using chiral dynami…
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Simulation of Spectra Code (SOS) for ITER Active Beam Spectroscopy Open
The concept and structure of the Simulation of Spectra (SOS) code is described starting with an introduction to the physics background of the project and the development of a simulation tool enabling the modeling of charge-exchange recombi…
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Fully self-consistent study of charge-exchange resonances and the impact on the symmetry energy parameters Open
We have examined within a fully self-consistent theoretical framework the energy difference between the anti-analog giant dipole resonance (AGDR) and the isobaric analog state (IAS), ${E}_{\mathrm{AGDR}}\ensuremath{-}{E}_{\mathrm{IAS}}$, a…
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Measurement of the double charge exchange reaction for the 20Ne + 130Te system at 306 MeV Open
The 130Te(20Ne,20O)130Xe double charge exchange reaction was measured for the first time at very forward angles with the MAGNEX magnetic spectrometer at INFN-LNS. The study, performed at beam energy of 306 MeV, is part of a systematic expl…
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The influence of blobs on neutral particles in the scrape-off layer Open
Interactions between plasma and neutrals are investigated with particular attention to the influence of large amplitude blob structures that mediate a significant particle and energy transport through the scrape-off layer (SOL). We perform…
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Ne x X-ray emission due to charge exchange in M82 Open
Recent X-ray observations of star-forming galaxies such as M82 have shown the\nLy beta/Ly alpha line ratio of Ne X to be in excess of predictions for thermal\nelectron impact excitation. Here we demonstrate that the observed line ratio\nma…
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Measurement of n-resolved State-selective Charge Exchange in Ne<sup>(8,9)+</sup> Collision with He and H<sub>2</sub> Open
Charge exchange between highly charged ions and neutral atoms and molecules has been considered as one of the important mechanisms controlling soft X-ray emissions in many astrophysical objects and environments. However, for modeling charg…