Results 41 to 50 of about 1,787,488 (253)
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
doaj +1 more source
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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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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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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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
doaj
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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Advanced Functional Materials, EarlyView.A 3D‐printable breast phantom is developed using patient‐derived MRI data and hydrogels that replicate the dielectric properties of healthy and cancerous tissues. Mechanical and dielectric characterization confirm its suitability for microwave imaging.
Carlos M. Andreu +5 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
A study of vacancy defects related to gray tracks in KTiOPO4 (KTP) using positron annihilation
AIP Advances, 2014 For the first time to our knowledge, positron annihilation spectroscopy (PAS) was used to study vacancy defects in KTiOPO4 (KTP) single crystals. Positron annihilation lifetime spectroscopy combined with dielectric measurements identified the existence ...
Yang Zhang +5 more
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