Zeolite‐Based Catalysts for Conversion of Oxygenated Polymer Waste by Positron Annihilation
Sign Up to like & getrecommendations! Published in 2024 at "ChemCatChem"
DOI: 10.1002/cctc.202301282
Abstract: Positron Annihilation Lifetime Spectroscopy (PALS) has been employed to investigate the catalysts HZSM‐5 and MESO−Y, which play a pivotal role in catalyzing and upgrading plastics, with a primary focus on oxygenated polymers, thereby transforming existing… read more here.
Keywords: positron; catalysts conversion; based catalysts; zeolite based ... See more keywords
Polarized hyperon production in single-inclusive electron-positron annihilation at next-to-leading order
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2019)111
Abstract: A bstractWe study the production of polarized Λ-hyperons in electron-positron annihilation. We are particularly interested in the transverse-spin dependence of the cross section for unpolarized incident electron-positron pairs. At high energies this process may be… read more here.
Keywords: polarized hyperon; leading order; electron positron; positron annihilation ... See more keywords
Electron-positron annihilation into heavy leptons at two loops
Sign Up to like & getrecommendations! Published in 2025 at "Journal of High Energy Physics"
DOI: 10.1007/jhep08(2025)118
Abstract: We calculate the NNLO QED corrections to the C-even part of differential cross section of e+e− → μ+μ− process. We neglect power corrections in the electron mass and obtain the result in terms of Goncharov’s… read more here.
Keywords: leptons two; electron positron; heavy leptons; two loops ... See more keywords
Defect structure transformation during substitution in quadruple perovskite CaCu3-Ti4-Fe2O12 studied by positron annihilation spectroscopy
Sign Up to like & getrecommendations! Published in 2019 at "Ceramics International"
DOI: 10.1016/j.ceramint.2019.06.083
Abstract: Abstract Positron annihilation spectroscopic studies have been performed to investigate the defect structural evolution in polycrystalline CaCu3-xTi4-xFe2xO12 (x = 0.0, 0.1, 0.3, 0.5 and 0.7) cubic perovskite samples. The positron lifetimes, relative intensities and Doppler-broadened annihilation lineshape… read more here.
Keywords: annihilation; spectroscopy; cacu3; structure ... See more keywords
Investigation of the interaction between hydrogen and irradiation defects in titanium by using positron annihilation spectroscopy
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Hydrogen Energy"
DOI: 10.1016/j.ijhydene.2021.01.128
Abstract: Abstract The formation of mono-vacancy, vacancy clusters and hydrogen-vacancy complexes with 30 keV H ion-irradiated pure titanium at different doses and temperatures was measured using by Positron annihilation spectroscopy (PAS). Results show a large number of HmVn… read more here.
Keywords: spectroscopy; hydrogen; titanium; vacancy ... See more keywords
Positron annihilation exploration of voids in zinc zirconium borate glass ceramics entrenched with ZnZrO3 perovskite crystal phases
Sign Up to like & getrecommendations! Published in 2017 at "Journal of The European Ceramic Society"
DOI: 10.1016/j.jeurceramsoc.2017.11.012
Abstract: Abstract Origin of atomic-deficient free-volume structure in ZnO–ZrO2–B2O3 glass ceramic versus ZrO2 concentration was explored by positron annihilation lifetime spectroscopy (PAL) technique. XRD and SEM studies, on the titled samples indicated that the samples consist… read more here.
Keywords: annihilation; positron annihilation; znzro3 perovskite; crystal phases ... See more keywords
Characterization of helium-vacancy complexes in He-ions implanted Fe9Cr by using positron annihilation spectroscopy
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Nuclear Materials"
DOI: 10.1016/j.jnucmat.2018.03.048
Abstract: The formation of helium bubble precursors, i.e., helium-vacancy complexes, was investigated for Fe9Cr alloy, which was uniformly irradiated by using 100 keV helium ions with fluences up to 5x10(16) ions/cm(2) at RT, 523, 623, 723,… read more here.
Keywords: positron annihilation; helium vacancy; vacancy complexes; spectroscopy ... See more keywords
Structural defects characterization of silver-phosphate glass nanocomposites by positron annihilation and related experimental studies
Sign Up to like & getrecommendations! Published in 2019 at "Materials Characterization"
DOI: 10.1016/j.matchar.2019.109928
Abstract: Abstract The structural defects and their role in the formation and properties of the metal oxide glass nanocomposite xAgI–(1-x) (0.65Ag2O–0.35P2O5) have been studied using several sensitive spectroscopic techniques. The nanocomposite samples have been prepared by… read more here.
Keywords: positron annihilation; glass; formation; structural defects ... See more keywords
Investigations on variation of defects in fused silica with different annealing atmospheres using positron annihilation spectroscopy
Sign Up to like & getrecommendations! Published in 2017 at "Optical Materials"
DOI: 10.1016/j.optmat.2017.06.047
Abstract: Abstract The laser damage resistance properties of the fused silica can be influenced by the microstructure variation of the atom-size intrinsic defects and voids in bulk silica. Two positron annihilation spectroscopy techniques have been used… read more here.
Keywords: positron annihilation; fused silica; variation; annihilation spectroscopy ... See more keywords
Detection of tribolayer in pure iron using positron annihilation and EBSD techniques
Sign Up to like & getrecommendations! Published in 2020 at "Tribology International"
DOI: 10.1016/j.triboint.2019.106133
Abstract: Abstract The subsurface zone induced by a dry sliding test performed on work-hardened iron has been studied using: positron annihilation spectroscopy, electron backscatter diffraction (EBSD), scanning electron microscopy (SEM) and crystallographic texture analysis. The total… read more here.
Keywords: detection tribolayer; positron annihilation; tribolayer pure; pure iron ... See more keywords
Evolution of Nitrogen-Related Defects in Graphitic Carbon Nitride Nanosheets Probed by Positron Annihilation and Photoluminescence Spectroscopy
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.8b01388
Abstract: Defects play a pivotal role in the device performance of a photocatalytic, light-emitting, or photovoltaic system. Herein, graphitic carbon nitride (g-C3N4) nanosheets are prepared at different calcination temperatures, and the evolution of defects in the… read more here.
Keywords: positron annihilation; photoluminescence spectroscopy; graphitic carbon; carbon nitride ... See more keywords