Results 31 to 40 of about 245,057 (208)
Annihilation of positrons, emitted at β+-decay with electrons of the daughter's atom [PDF]
Ядерна фізика та енергетика, 2010 The processes of photon creation or atom ionization during annihilation of positron with other electron of daughter’s atom at β+-decay are considered.
S. M. Fedotkin
doaj
Positron annihilation in boron nitride
Condensed Matter Physics, 2006 Electron and positron charge densities are calculated as a function of position in the unit cell for boron nitride. Wave functions are derived from pseudopotential band structure calculations and the independent particle approximation (IPM), respectively,
N.Amrane
doaj +1 more source
In-flight annihilation correction for 511 keV photon spectrometry
EPJ Web of Conferences, 2017 Spectrometry based on the 511 keV annihilation photopeak requires the positron source to be surrounded by a suitable absorber material. While this method is well established in the literature, correction for in-flight annihilation losses from the 511 keV
Steyn G.F. +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida +16 more
wiley +1 more source
Defect Analysis of the β– to γ–Ga2O3 Phase Transition
Advanced Functional Materials, EarlyView.The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas +9 more
wiley +1 more source
Radiationless and inelastic processes contribution to the nuclear excitation at the positron-atomic electron annihilation [PDF]
Ядерна фізика та енергетика, 2007 The process of nuclear excitation at the positron-atomic electron annihilation was considered. It is offered a new definition for the part of positrons, which excite nuclei at the annihilation.
S. N. Fedotkin, V. A. Zheltonozhskii
doaj
Positron-Hydrogen Scattering, Annihilation, and Positronium Formation
Atoms, 2016 In previous papers (Bhatia A.K. 2007, 2012) a hybrid theory for the scattering of electrons from a hydrogenic system was developed and applied to calculate scattering phase shifts, Feshbach resonances, and photoabsorption processes.
Anand K. Bhatia
doaj +1 more source
, 2017 A series of Zn and Co-substituted nickel ferrite nanoparticles of nominal composition Ni1−xZnxFe2−xCoxO4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) have been synthesized by the PVA assisted sol–gel method.
H. Nikmanesh +8 more
semanticscholar +1 more source
Advanced Functional Materials, EarlyView.A scalable one‐step copolymerization strategy is developed to produce low‐cost microporous ion exchange membranes that boost both the efficiency and lifespan of flow batteries. When combined with organic electrolytes in aqueous systems, these membranes enable safe and cheap flow battery energy storage, supporting the widespread integration of renewable
Jiaye Liu +7 more
wiley +1 more source
Detectors in positron emission tomography
Zeitschrift für Medizinische Physik, 2023 Positron emission tomography is a highly sensitive molecular imaging modality, based on the coincident detection of annihilation photons after positron decay.
Artem Zatcepin, Sibylle I. Ziegler
doaj +1 more source