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Distribution of Positron Annihilation Lifetime Components
مجلة بغداد للعلوم, 2008 The intensities of the positron annihilation lifetime components are shown to be related to the free volume model, and the theoretical value of the ratio between the singlet to the triplet state intensities, described by the ratio η, is shown to follow ...
Ahmed Abdul-Razzaq Selman +1 more
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Anomalous Positron Lifetime in Single Crystal of Weyl Semimetal CoSi
Crystals, 2023 The positron annihilation lifetimes were measured using a 48V positron source in noncentrosymmetric cubic single crystals of CoSi, FeSi and MnSi. The following lifetimes were determined from the positron annihilation time spectra: 168(1) ps for CoSi, 114(
D. A. Salamatin +10 more
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Comment on the Positron Surface-State Lifetime [PDF]
Physical Review Letters, 1984 Quand on calcule de facon coherente de l'energie de correlation des positons et la vitesse d'annihilation, la theorie explique au moins de facon qualitative la duree de vie de l'etat de surface des ...
R. M. Nieminen, M. J. Puska, M. Manninen
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Condensed matter investigation by positron lifetime technique [PDF]
AIP AdvancesPositron lifetime spectroscopy (PLS) was used to investigate various condensed matter samples, both pure and after certain treatments. The positron lifetime spectrum was measured for four pure alkali halides (NaCl, KCl, KBr, and KI).
Aziz Mouzali, Noureddine Bendjedda
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Positron Spectroscopy of Nanodiamonds after Hydrogen Sorption
Nanomaterials, 2018 The structure and defects of nanodiamonds influence the hydrogen sorption capacity. Positronium can be used as a sensor for detecting places with the most efficient capture of hydrogen atoms.
Lyudmila Nikitina +4 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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Investigation on Electrical Properties and Microdefects of Nb5+-Doped BaTiO3 Based Ceramics by Positron Annihilation Techniques [PDF]
Materials Research, 2019 The influence of the Nb5+-doped content and the doping CaCO3 on the electrical properties and the microdefects of BSTN ceramics by Positron Annihilation Techniques were studied, which were fired at 1350 ºC for 2 hours in air.
Xuxin Cheng +3 more
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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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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
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source