Results 41 to 50 of about 42,514 (244)
Review on Steel Enhancement for Nuclear RPVs
Metals, 2021 The reactor pressure vessel (RPV) is one of the most important elements of a nuclear power plant (NPP). The RPV determines the plant operational lifetime since it is not replaceable economically.
Ferenc Gillemot
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Positron annihilation lifetime spectroscopy study of roller burnished magnesium alloy
Nukleonika, 2015 The effect of roller burnishing on Vickers’ hardness and positron lifetimes in the AZ91HP magnesium alloy was studied. The microhardness increases with an increase in the burnishing force and with a decrease in the feed. The comparison of various methods
Zaleski Radosław +2 more
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Monte Carlo simulation of positronium thermalization in gases [PDF]
Hemijska Industrija, 2010 In this paper we present the results of Monte Carlo simulations of positronium (Ps) swarm thermalization in helium (He) and water vapour. We have investigated the temporal evolution of energy and spatial parameters of the swarm and their sensitivity to ...
Marjanović Srđan D., Šuvakov Milovan
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Surfaces of colloidal PbSe nanocrystals probed by thin-film positron annihilation spectroscopy
APL Materials, 2013 Positron annihilation lifetime spectroscopy and positron-electron momentum density (PEMD) studies on multilayers of PbSe nanocrystals (NCs), supported by transmission electron microscopy, show that positrons are strongly trapped at NC surfaces, where ...
L. Chai +13 more
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Principles of positron porosimetry
Nukleonika, 2015 The paper deals with positron porosimetry (PP), which is based on positron annihilation lifetime spectroscopy (PALS). The numerical analysis of positron lifetime spectra for PP is more demanding than in most of other applications of PALS.
Zaleski Radosław
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Nuclear Materials and Energy, 2023 First-principles calculations related to defect complexes formed from a monovacancy and multiple interstitial impurity atoms (hydrogen, carbon, nitrogen, and oxygen atoms) in tungsten were performed.
Atsushi Yabuuchi
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Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects
Nuclear Materials and EnergyPolycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to three different damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K.
B. Wieluńska-Kuś +4 more
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Positron Annihilation Spectroscopy in Materials and Technical Details of Measurement Systems [PDF]
فصلنامه علوم و فناوری فضایی, 2013 Being a very powerful method, Positron Annihilation Spectroscopy (PAS) has been widely used for investigation of defects type and concentration in materials in recent years.
A. A. Mehmandoost-Khajeh-Dad +2 more
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Characterization of vacancy defects in Cu(In,Ga)Se2 by positron annihilation spectroscopy
AIP Advances, 2016 The photovoltaic performance of Cu(In1-x,Gax)Se2 (CIGS) materials is commonly assumed to be degraded by the presence of vacancy-related defects. However, experimental identification of specific vacancy defects remains challenging.
M. R. M. Elsharkawy +4 more
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Microstructure and luminescent properties of Eu3+-activated MgGa2O4:Mn2+ ceramic phosphors
Journal of Advanced Ceramics, 2020 Mn2+ and the trivalent europium (Eu3+)-doped MgGa2O4 ceramics are characterized using a multi-experimental approach. The formation of spinel-structured ceramics is ascertained from X-ray diffraction (XRD) analysis.
A. Luchechko +8 more
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