Results 31 to 40 of about 144,387 (227)
Neutron irradiated tungsten bulk defect characterization by positron annihilation spectroscopy
Nuclear Materials and Energy, 2021 Positron annihilation spectroscopy was used to evaluate the defects in neutron irradiated tungsten exposed at five different irradiation conditions. The variables in neutron irradiation included temperature, displacements per atom (dpa), and neutron ...
Chase N. Taylor +4 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Hydrophilic PEO‐copolymers and hydrophobic PDMS are physically integrated via a compatibilizing solvent into an amphipathic dual‐polymer network with versatile interfacial affinity and completely amorphized PEO segments for hyper‐permeable CO2 transport.
Ji Wu +9 more
wiley +1 more source
Annihilation of positrons, emitted at β+-decay with electrons of the daughter's atom [PDF]
Ядерна фізика та енергетика, 2010 The processes of photon creation or atom ionization during annihilation of positron with other electron of daughter’s atom at β+-decay are considered.
S. M. Fedotkin
doaj
Positron annihilation in liquid crystals
Nukleonika, 2015 Positron annihilation studies of liquid crystals are reviewed with particular reference to thermotropic liquid crystals with rod-like molecules. The studies of compounds exhibiting smectic A or smectic E phases indicate that local arrangement of dipole ...
Dryzek Ewa, Juszyńska-Gałązka Ewa
doaj +1 more source
Advanced Materials, EarlyView.The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo +7 more
wiley +1 more source
In-flight annihilation correction for 511 keV photon spectrometry
EPJ Web of Conferences, 2017 Spectrometry based on the 511 keV annihilation photopeak requires the positron source to be surrounded by a suitable absorber material. While this method is well established in the literature, correction for in-flight annihilation losses from the 511 keV
Steyn G.F. +5 more
doaj +1 more source
Ion Concentration and Voltage Imaging With Fluorescent Nanodiamonds
Advanced Materials, EarlyView.We demonstrate reversible switching between the fluorescent NV0 and the dark NV+ state, in sub‐30 nm FNDs via surface oxidation and hydrogenation, respectively. In an electrochemical cell, we show that the fluorescence from hydrogenated particles enables all‐optical imaging of voltages and ion concentrations at the micrometer scale.
Patrick Voorhoeve +8 more
wiley +1 more source
Positronium Annihilation Lifetime Spectroscopy Study of SBA-15 [PDF]
, 2010 Positronium annihilation lifetime spectroscopy (PALS) is a technique used in the characterization of porosity in nanostructured materials. Positrons, the antiparticle to the electron, enter a sample and either immediately annihilate with an electron or ...
Tracy K. Steinbach, Steinbach, Tracy K
core
Vacancy creation in electron irradiated Ni3Al
, 2004 We study the defect creation in electron irradiated Ni3Al. The complete irradiation experiment was simulated using Monte Carlo and molecular dynamics techniques.
Segers, D. (author) +3 more
core +1 more source
Calculation of Low-Energy Positron-Atom Scattering with Square-Integrable Wavefunctions
Atoms, 2022 The variational method is applied to the low-energy positron scattering and annihilation problem. The ultimate aim of the investigation is to find a computationally economical way of accounting for strong electron–positron correlations, including the ...
Sarah Gregg, Gleb Gribakin
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