Results 31 to 40 of about 442,874 (245)
Relativistic Ionization of Hydrogen Atoms by Positron Impact
Atoms, 2016 Relativistic triple differential cross-sections (TDCS) for ionization of hydrogen atoms by positron impact have been calculated in the symmetric coplanar geometry. We have used Dirac wave functions to describe free electron’s and positron’s sates.
Amal Chahboune +3 more
doaj +1 more source
Universe, 2020 We investigated the effects that occur during the circulation of ultrarelativistic electrons and positrons in the field of an X-ray pulsar. A resonant process in annihilation and the subsequent production of the electron–positron pairs were studied ...
Dmitriy V. Doroshenko +2 more
doaj +1 more source
A Method to Measure Positron Beam Polarization Using Optically Polarized Atoms
Atoms, 2023 We outline an experimental technique for measuring the degree of polarization of a positron beam using an optically pumped, spin-polarized Rb target. The technique is based on the production and measurement of the ortho- and para-positronium fractions ...
Joshua R. Machacek +3 more
doaj +1 more source
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
openaire +3 more sources
Frontiers in Physics, 2019 The fast-paced development of laser-wakefield electron acceleration has recently culminated in the generation of electron beams with extreme characteristics, including femtosecond-scale duration, mrad divergence, and high-energy.
Aaron Alejo +3 more
doaj +1 more source
European Journal of Neurology, 2018 Recommendations for using fluorodeoxyglucose positron emission tomography (FDG‐PET) to support the diagnosis of dementing neurodegenerative disorders are sparse and poorly structured.
F. Nobili +11 more
semanticscholar +1 more source
Two-zone Diffusion of Electrons and Positrons from Geminga Explains the Positron Anomaly [PDF]
Astrophysical Journal, 2018 The recent HAWC observations of a very-high-energy γ-ray halo around Geminga and Monogem indicate a very slow diffusion of cosmic rays that results in a tiny contribution of positrons from these two pulsars to the local flux.
K. Fang, X. Bi, P. Yin, Q. Yuan
semanticscholar +1 more source
Frontiers in Physics, 2021 Background: Increased throughput in small animal preclinical studies using positron emission tomography leads to reduced costs and improved efficiency of experimental design, however the presence of multiple off-centre subjects, as opposed to a single ...
Nikos Efthimiou +10 more
doaj +1 more source
Higgs physics at the CLIC electron–positron linear collider [PDF]
The European Physical Journal C, 2016 The Compact Linear Collider (CLIC) is an option for a future e+e-\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\
H. Abramowicz +123 more
semanticscholar +1 more source
Hypoxia Imaging in Lung Cancer: A PET-Based Narrative Review for Clinicians and Researchers
PharmaceuticalsBackground: Hypoxia plays a critical role in lung cancer progression and treatment resistance by contributing to aggressive tumor behavior and poor therapeutic response.
Ahmad Alenezi +3 more
doaj +1 more source