Results 101 to 110 of about 9,908 (221)
Generation and characterization of point defects in SrTiO3 and Y3Al5O12
Results in Physics, 2015 Positron annihilation lifetime spectroscopy (PALS) was applied to characterize point defects in single crystals of Y3Al5O12 and SrTiO3 after populating different types of defects by relevant thermal treatments.
F.A. Selim +5 more
doaj +1 more source
Lifetime positron annihilation spectroscopy and photo-inactivated bacteria
, 2009 3 ...
openaire +2 more sources
From polymer to SiOC glass: structure, microstructure, mechanical, and thermal properties
Journal of the American Ceramic Society, Volume 108, Issue 12, December 2025.Abstract The transformation of a methyl‐siloxane into a SiOC glass in Ar and reactive CO2 atmosphere was studied through positron annihilation spectroscopy, infrared spectroscopy, density, and calorimetric measurements, whereas the mechanical properties were monitored by nanoindentation and the thermal diffusivity measured by the laser flash method ...
Mattia Biesuz +13 more
wiley +1 more source
ChemPhysChem, Volume 26, Issue 23, November 28, 2025.A polyimide sample, for which hyperpolarized 129Xe NMR spectroscopy failed to detect 129Xe embedded in the polymer (Inset A), is found to give a very broad peak, line width 11 kHz at 206.5 ppm, by applying the stopped‐flow hyper‐chemical exchange saturation transfer subtraction spectroscopy on the continuous‐flow recirculating hyper‐polarization system
Hideaki Fujiwara +2 more
wiley +1 more source
A spectroscopy approach to measure the gravitational mass of antihydrogen
, 2013 We study a method to induce resonant transitions between antihydrogen ($\bar{H}$) quantum states above a material surface in the gravitational field of the Earth.
Dalkarov, O. D. +8 more
core +3 more sources
Stable fourfold configurations for small vacancy clusters in silicon from ab initio calculations
, 2004 Using density-functional-theory calculations, we have identified new stable configurations for tri-, tetra-, and penta-vacancies in silicon. These new configurations consist of combinations of a ring-hexavacancy with three, two, or one interstitial atoms,
D. V. Makhov +8 more
core +1 more source
Positron annihilation spectroscopy with magnetically analyzed beams [PDF]
Lifetime measurements with magnetically analyzed positron beams were made in condensed media with uniform and non-uniform properties. As expected, the lifetime values with magnetically analyzed positron beams in uniform targets are similar to those ...
Holt, W. H., Mock, W., Jr., Singh, J. J.
core +1 more source
Performance of three-photon PET imaging: Monte Carlo simulations
, 2005 We have recently introduced the idea of making use of three-photon positron annihilations in positron emission tomography. In this paper the basic characteristics of the three-gamma imaging in PET are studied by means of Monte Carlo simulations and ...
Charlton M +6 more
core +1 more source
Vacancy complexes in nonequilibrium germanium-tin semiconductors
, 2019 Understanding the nature and behavior of vacancy-like defects in epitaxial GeSn metastable alloys is crucial to elucidate the structural and optoelectronic properties of these emerging semiconductors.
A. Wagner +10 more
core +1 more source
Defect Imaging and Detection of Precipitates Using a New Scanning Positron Microbeam
, 2017 We report on a newly developed scanning positron microbeam based on threefold moderation of positrons provided by the high intensity positron source NEPOMUC.
Beddrich, Lukas +6 more
core +1 more source