Results 11 to 20 of about 260,823 (197)
Positron-Induced Luminescence [PDF]
Physical Review Letters, 2018 We report on the observation that low-energy positrons incident on a phosphor screen produce significantly more luminescence than electrons do. For two different wide-band-gap semiconductor phosphors (ZnS:Ag and ZnO:Zn), we compare the luminescent response to a positron beam with the response to an electron beam.
E. V. Stenson +6 more
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On the Nature of the Positronic Bond [PDF]
ChemPhysChem, 2019 AbstractRecently it has been proposed that the positron, the anti‐particle analog of the electron, is capable of forming an anti‐matter bond in a composite system consists of two hydride anions and a positron [Angew. Chem. Int. Ed. 57, 8859–8864 (2018)].
Mohammad Goli, Shant Shahbazian
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Universe, 2022 Lepton-flavor violation (LFV) has been discovered in the neutrino sector by neutrino oscillation experiments. The minimal extension of the Standard Model (SM) to include neutrino masses allows LFV in the charged sector (CLFV) at the loop level, but at rates that are too small to be experimentally observed.
MyeongJae Lee, Michael MacKenzie
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Astrophysics and Space Science, 2023 AbstractThe Positron Puzzle is a half-century old conundrum about the origin of the Galactic $\gamma $ γ -ray emission line at photon energies of 511 keV, and the shape of its morphology, showing a bulge-to-disk luminosity ratio of $\sim 1$ ∼ 1 – unlike any ...
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Resonance, 1949 The problem of the behavior of positrons and electrons in given external potentials, neglecting their mutual interaction, is analyzed by replacing the theory of holes by a reinterpretation of the solutions of the Dirac equation. It is possible to write down a complete solution of the problem in terms of boundary conditions on the wave function, and ...
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What aspects of solar flares can be clarified with mm/submm observations?
Frontiers in Astronomy and Space Sciences, 2022 This paper identifies several unsolved questions about solar flares, which can potentially be answered or at least clarified with mm/submm observations with ALMA.
Gregory D. Fleishman +3 more
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Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study
Atoms, 2021 The vibrational excitation cross-section of a diatomic molecule by positron impact is obtained using wave-packet propagation techniques. The dynamics study was carried on a two-dimensional potential energy surface, which couples a hydrogenlike harmonic ...
Luis A. Poveda +2 more
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Positron-electron annihilation momentum transfer to trapped deuterons
AIP Advances, 2019 The probability of positron annihilation momentum transfer to a trapped deuteron is calculated based on neutron measurements from 2H(d,n)3He reactions in deuterated palladium thin films. Deuterium gas loading in Pd thin films creates a high D/Pd fraction
Ryan Weed +4 more
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Few Body Effects in the Electron and Positron Impact Ionization of Atoms
Atoms, 2021 Triple differential cross sections (TDCS) are presented for the electron and positron impact ionization of inert gas atoms in a range of energy sharing geometries where a number of significant few body effects compete to define the shape of the TDCS ...
R.I. Campeanu, Colm T. Whelan
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Calculation of Low-Energy Positron-Atom Scattering with Square-Integrable Wavefunctions
Atoms, 2022 The variational method is applied to the low-energy positron scattering and annihilation problem. The ultimate aim of the investigation is to find a computationally economical way of accounting for strong electron–positron correlations, including the ...
Sarah Gregg, Gleb Gribakin
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