Efficient and surface site-selective ion desorption by positron annihilation
Scientific Reports, 2018 We compared positron- and electron-stimulated desorption (e+SD and ESD) of positive ions from a TiO2(110) surface. Although desorption of O+ ions was observed in both experiments, the desorption efficiency caused by positron bombardment was larger by one
Takayuki Tachibana +4 more
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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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Advancements in Targeted Radiopharmaceuticals: Innovations in Diagnosis and Therapy for Enhanced Cancer Management. [PDF]
ChembiochemRadiopharmaceuticals enable precise cancer diagnosis and targeted therapy by combining radioactive isotopes with carrier molecules. This review summarizes advances from 2014 to 2025, emphasizing probe design, click chemistry, novel targets, and nanodelivery systems.
Shaikh MS +7 more
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Testing entanglement of annihilation photons
Scientific Reports, 2023 We present a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest. Each annihilation photon has an energy that is five orders of magnitude higher than the energy of photons in optical ...
Alexander Ivashkin +7 more
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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
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Atomic ionization at annihilation of positrons emitted at β+-decay [PDF]
Ядерна фізика та енергетика, 2011 Atomic ionization at annihilation of positron with another electron of daughter's atom at +-decay is studied. Processes of the different atomic shells ionization at annihilation of positron, emitted at +-decay, with K-electron of daughter's atom are ...
S. N. Fedotkin
doaj
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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State-selective high-energy excitation of nuclei by resonant positron annihilation
Physics Letters B, 2015 In the annihilation of a positron with a bound atomic electron, the virtual γ photon created may excite the atomic nucleus. We put forward this effect as a spectroscopic tool for an energy-selective excitation of nuclear transitions.
Nikolay A. Belov, Zoltán Harman
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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
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Electron–positron annihilation into hadrons at the higher-loop levels
European Physical Journal C: Particles and Fields, 2017 The strong corrections to the R-ratio of electron–positron annihilation into hadrons are studied at the higher-loop levels. Specifically, the derivation of a general form of the commonly employed approximate expression for the R-ratio (which constitutes ...
A. V. Nesterenko
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