Results 21 to 30 of about 260,823 (197)
18F-fluorodeoxyglucose positron emission tomography / computed tomography in primary Ewing sarcoma of the lung [PDF]
Srpski Arhiv za Celokupno Lekarstvo, 2022 Introduction. Ewing sarcoma is rare in medical practice, and evaluating positron emission tomography / computed tomography (PET/CT) imaging of soft tissue Ewing sarcoma is a challenge. Primary Ewing sarcoma of the lung is an infrequent diagnosis.
Zivgarević Ljiljana, Žunić Svetlana
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Positrons at Jefferson Lab [PDF]
AIP Conference Proceedings, 2009 We review the compelling case for establishing a capability to accelerate positrons at Jefferson Lab. The potential appplications range from the study of two-photon exchange and deeply-virtual Compton scattering to exploiting the charge current weak interaction to probe the flavor structure of hadrons and nuclei.
Anthony W. Thomas +5 more
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High Efficiency Cyclotron Trap Assisted Positron Moderator
Instruments, 2018 We report on the realisation of a cyclotron trap assisted positron tungsten moderator for the conversion of positrons with a broad keV–few MeV energy spectrum to a mono-energetic eV beam with an efficiency of 1.8(2)% defined as the ratio of the ...
Lars Gerchow +11 more
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Alternative Positron-Target Design for Electron-Positron Colliders [PDF]
, 1991 Current electron-positron linear colliders are limited in luminosity by the number of positrons which can be generated from targets presently used. This paper examines the possibility of using an alternate wire-target geometry for the production of positrons via an electron-induced electromagnetic cascade shower. 39 refs., 38 figs., 5 tabs.
Donahue, R.J., Nelson, W.R.
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Research Progress of Melanoma Imaging with Radionuclide Agents
Journal of Isotopes, 2015 In comparison with CT, ultrasonography, MRI et al, scintigraphic imaging have the advantages of high specificity and recognizes lesions and structure-function of the receptor and metabolism in molecular level, which could diagnose melanoma and its ...
YOU Qiang +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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Deep Minimum and a Vortex for Positronium Formation in Low-Energy Positron-Helium Collisions
Atoms, 2021 We find a zero in the positronium formation scattering amplitude and a deep minimum in the logarithm of the corresponding differential cross section for positron–helium collisions for an energy just above the positronium formation threshold ...
Albandari W. Alrowaily +2 more
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Positron trapping in semiconductors [PDF]
Physical Review B, 1990 Positron trapping into vacancies in semiconductors is studied on the basis of Fermi's golden-rule calculations. The emphasis is put on the comparison of the trapping properties into defects in different charge states. In particular, the temperature dependences are investigated.
Puska, M. J. +2 more
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ELECTRON-POSITRON- COLLIDERS [PDF]
International Journal of Modern Physics A, 2002 An electron-positron linear collider in the energy range between 500 and 1000 GeV is of crucial importance to precisely test the Standard Model and to explore the physics beyond it. The physics program is complementary to that of the Large Hadron Collider.
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Positron Emulator for Commisioning ILC Positron Source [PDF]
Proceedings of the 2005 Particle Accelerator Conference, 2006 The gamma-ray based positron source [1] is an attractive option for the International Linear Collider (ILC) positron option because of the less stringent target requirement and the possibility to provide polarization. The drawback is the fact that the positron accelerator system including positron linac and damping ring can not be fully commissioned ...
K-J. Kim +3 more
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