Results 31 to 40 of about 42,514 (244)
A single shot gamma-induced positron spectroscopy based on laser wakefield accelerator
AIP Advances, 2021 Single shot gamma-induced positron annihilation spectroscopy (GiPS) based on a laser wakefield accelerator is proposed. In this spectroscopy, a large number of gamma rays generated by laser-wakefield accelerated electrons are injected into a sample in a ...
Yonghong Yan +9 more
doaj +1 more source
Commissioning of the J-PET detector in view of the positron annihilation lifetime spectroscopy [PDF]
Hyperfine Interactions, 2018 The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It is a multi-purpose detector designed for medical imaging and for studies of properties of positronium atoms in porous matter and in living ...
K. Dulski +33 more
semanticscholar +1 more source
, 2021 Electron–matter coupling is a fascinating way to tune and modify the properties of materials. In this work, we present a study on the formation and nature of vacancy-like defects in α-Ag2WO4 sample...
M. Assis +10 more
semanticscholar +1 more source
Scientific Reports, 2020 Samples of healthy and neoplastic myometrial tissues were investigated using Positron Annihilation Lifetime Spectroscopy (PALS). Meaningful differences between normal and diseased tissues were observed for each patient.
B. Zgardzińska +7 more
semanticscholar +1 more source
Optical Materials: X, 2022 Gamma-ray-induced positron annihilation lifetime spectroscopy (GiPALS) was used to characterize pristine and codoped Lu3Al5O12 (LuAG) crystals grown using Czochralski (Cz) and micropulling-down (mPD) methods.
Mamoru Kitaura +2 more
doaj +1 more source
Au/GaAs interface annealing study by positron-lifetime spectroscopy [PDF]
Physical Review B, 1995 Structural changes of annealed Au contacts on semi-insulating GaAs have been observed by conventional positron lifetime-spectroscopy in which a significant fraction of positrons are drifted from a $^{22}\mathrm{Na}$ source to the contact by an electric field. For annealing temperatures below 200 \ifmmode^\circ\else\textdegree\fi{}C it is found that the
Wang, YY +4 more
openaire +4 more sources
DLTPulseGenerator: A library for the simulation of lifetime spectra based on detector-output pulses
SoftwareX, 2018 The quantitative analysis of lifetime spectra relevant in both life and materials sciences presents one of the ill-posed inverse problems and, hence, leads to most stringent requirements on the hardware specifications and the analysis algorithms. Here we
Danny Petschke, Torsten E.M. Staab
doaj +1 more source
FACILITIES FOR NANO MATERIALS EXAMINATION AT THE PULSTAR REACTOR [PDF]
EPJ Web of Conferences, 2021 The PULSTAR is a 1-MWth nuclear research reactor located at North Carolina State University. It is fueled by uranium dioxide assemblies enriched to 4% or 6% in U-235 and is currently under licensing for operation at 2-MWth power.
Hawari A. I., Liu M., Cai Q.
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Determining the positron lifetime of a material using Positron Annihilation Lifetime Spectroscopy
HNPS Proceedings, 2019 N ...
K. Triantou +4 more
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Positron Lifetime Spectroscopy of Nanocrystalline Copper
Acta Physica Polonica A, 1999 Positron lifetime spectroscopy was applied to investigate the thermal stability of nanocrystalline copper prepared by severe plastic torsion deformation. Positrons annihilating in as prepared specimens exhibited free positron component τ1 and two defect components r2 = 164 ps and r3 = 255 ps.
J. C̆ížek +4 more
openaire +1 more source