Results 1 to 10 of about 558,215 (330)
Usefulness of respiratory-gated PET acquisition during delayed 18F-FDG PET/CT scanning for patients with liver metastases [PDF]
Asia Oceania Journal of Nuclear Medicine and Biology, 2021 Objective(s): To assess respiratory-gated (RG) positron emission tomography (PET) acquisition for patients with liver metastases during delayed PET/computed tomography (CT) scanning with fluorine-18-fluorodeoxyglucose (18F-FDG).Methods: Nineteen patients
Shota Watanabe +6 more
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Preliminary study on characteristic X-ray yields of the thick-targe impacted by low-energy positron
He jishu, 2021 BackgroundX-ray emission from solid samples exposed to positron beams in the low-energy region is the basis of some material analysis techniques.PurposeThis study aims to measure the K-shell characteristic X-ray yields of Ti (Z=22) target collided by 10 ...
TIAN Lixia +3 more
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The Vortex Surface in a Three-Body Quantum System
Atoms, 2023 Vortices are structures known in our daily lives and observed in a wide variety of systems, from cosmic to microscopic scales. Relatively recent studies showed that vortices could also appear in simple quantum systems.
Tamara A. Guarda +2 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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Erdheim-Chester Disease: Utility of 18F-FDG Positron Emission Tomography [PDF]
Journal of Clinical and Diagnostic Research, 2018 Erdheim-Chester Disease (ECD) is a rare non Langerhans cell histiocytosis of unknown origin with multiorgan involvement. We report a case of a man who presented to us with haematuria, asthenia, fever, nausea and malleolar oedema.
Angelina Cistaro +4 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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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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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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Frontiers in Physics, 2023 Scattering phase shifts and annihilation rates for low-energy positrons interacting with noble gas atoms are calculated ab initio using many-body theory implemented in the Gaussian-orbital code EXCITON+.
J. Hofierka +5 more
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Mechanisms of positron annihilation on molecules [PDF]
, 1999 The aim of this work is to identify the mechanisms responsible for very large rates and other peculiarities observed in low-energy positron annihilation on molecules.
Gribakin, G. F.
core +3 more sources