Results 11 to 20 of about 1,414,987 (211)
Applications of Positron Annihilation Spectroscopy [PDF]
Le Journal de Physique IV, 1995 We describe the application of Positron Annihilation Spectroscopy (PAS) to some selected technologically important systems. The method involves a nondestructive probe to detect low levels of open-volume defects. The discussion shows the application of PAS to a wide range of advanced material systems.
Asoka-Kumar, P., Lynn, K.
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Single-shot positron annihilation lifetime spectroscopy using a liquid scintillator [PDF]
AIP Advances, 2021 Liquid scintillators provide a fast, single component response. However, they traditionally have a low flashpoint and high vapor pressure. We demonstrate the use of an EJ-309 scintillator (high flashpoint and low vapor pressure variant) to acquire single-
Joshua R. Machacek +2 more
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Positron annihilation spectroscopy on a beam of positrons the LEPTA facility [PDF]
EPJ Web of Conferences, 2017 The results and possibilities of the samples surfaces research by the Doppler method of positron annihilation spectroscopy (PAS) for a monochromatic beam of positrons at the LEPTA facility are presented in this paper.
Ahmanova E.V. +7 more
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Positron-Annihilation Lifetime Spectroscopy using Electron Bremsstrahlung [PDF]
Journal of Physics: Conference Series, 2015 A new type of an intense source of positrons for materials research has been set up at the superconducting electron linear. The source employs hard X-rays from electron- bremsstrahlung production generating energetic electron-positron pairs inside the sample under investigation. CW-operation allows performing experiments with significantly reduced pile-
Wagner, A. +7 more
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Positron annihilation spectroscopy in materials science
Bulletin of Materials Science, 1994 The application of positron annihilation spectroscopy to the study of defects in materials is illustrated through several examples drawn from our work. These include the study of vacancy clustering in metals, clustering of He atoms to form bubbles, and solute clustering in alloys.
Sundar, C. S.
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Defects in metals. [Positron annihilation spectroscopy] [PDF]
, 1982 The application of positron annihilation spectroscopy (PAS) to the study of defects in metals has led to increased knowledge on lattice-defect properties during the past decade in two areas: the determination of atomic defect properties, particularly those of monovacancies, and the monitoring and characterization of vacancy-like microstructure ...
Siegel, R. W.
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Positron annihilation lifetime spectroscopy at a superconducting electron accelerator [PDF]
Journal of Physics: Conference Series, 2017 The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA. The electron beam is employed for production of several secondary beams including X-rays from bremsstrahlung production, neutrons, and positrons.
Wagner, A. +10 more
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Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy
Physical Review Accelerators and Beams, 2021 Submicron defects represent a well-known fundamental problem in manufacturing since they can significantly affect performance and lifetime of virtually any high-value component. Positron annihilation lifetime spectroscopy is arguably the only established
Thomas L. Audet +12 more
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Neutron irradiated tungsten bulk defect characterization by positron annihilation spectroscopy
Nuclear Materials and Energy, 2021 Positron annihilation spectroscopy was used to evaluate the defects in neutron irradiated tungsten exposed at five different irradiation conditions. The variables in neutron irradiation included temperature, displacements per atom (dpa), and neutron ...
Chase N. Taylor +4 more
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Positron annihilation lifetime spectroscopy at a superconducting electron accelerator [PDF]
, 2023 The Helmholtz-Zentrum Dresden-Rossendorf operates a superconducting linear accelerator for electrons with energies up to 35 MeV and average beam currents up to 1.6 mA.
Wagner, A. +10 more
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