Results 11 to 20 of about 55,721 (192)
Positron scattering and annihilation on noble-gas atoms [PDF]
, 2014 Positron scattering and annihilation on noble gas atoms below the positronium formation threshold is studied ab initio using many-body theory methods. The many-body theory provides a near-complete understanding of the positron-noble-gas-atom system at ...
D. G. Green +2 more
openalex +4 more sources
New physics searches at the ILC positron and electron beam dumps
Journal of High Energy Physics, 2021 We study capability of the ILC beam dump experiment to search for new physics, comparing the performance of the electron and positron beam dumps. The dark photon, axion-like particles, and light scalar bosons are considered as new physics scenarios ...
Kento Asai +3 more
doaj +1 more source
Myocardial Perfusion Defects in Hypertrophic Cardiomyopathy Mutation Carriers
Journal of the American Heart Association, EarlyView., 2021 Background Impaired myocardial blood flow (MBF) in the absence of epicardial coronary disease is a feature of hypertrophic cardiomyopathy (HCM). Although most evident in hypertrophied or scarred segments, reduced MBF can occur in apparently normal segments.
Rebecca K. Hughes +14 more
wiley +1 more source
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
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
Mode coupling and multiquantum vibrational excitations in Feshbach-resonant positron annihilation in molecules [PDF]
, 2017 The dominant mechanism of low-energy positron annihilation in polyatomic molecules is through positron capture in vibrational Feshbach resonances (VFR).
Danielson, J. R. +4 more
core +2 more sources
Nanoscale Research Letters, 2017 The objective of the study was the structural analysis of the 70TeO2-5XO-10P2O5-10ZnO-5PbF2 (X = Mg, Bi2, Ti) tellurite glasses doped with ions of the rare-earth elements Er3+, based on the PALS (positron annihilation lifetime spectroscopy) method of ...
K. Pach +4 more
doaj +1 more source
Dark sector studies with the PADME experiment
SciPost Physics Proceedings, 2023 The Positron Annihilation to Dark Matter Experiment (PADME) uses the positron beam of the DA$\Phi$NE Beam-Test Facility, at the Laboratori Nazionali di Frascati (LNF) to search for a Dark Photon $A'$.
Anna Paola Caricato, Maurizio Martino, Isabella Oceano, Federica Oliva, Stefania Spagnolo, Gabriele Chiodini, Fabio Bossi, Riccardo De Sangro, Claudio Di Giulio, Danilo Domenici, Giuseppe Finocchiaro, Luca Gennaro Foggetta, Marco Garattini, Andrea Ghigo, Federica Giacchino, Paola Gianotti, Tommaso Spadaro, Eleuterio Spiriti, Clara Taruggi, Elisabetta Vilucchi, Venelin Kozhuharov, Simeon Ivanov, Sevtoslav Ivanov, Radoslav Simeonov, Georgi Georgiev, Fabio Ferrarotto, Emanuele Leonardi, Paolo Valente, Elizabeth Long, Giovanni Organtini, Gabriele Piperno, Mauro Raggi, Salvatore Fiore, Paolo Branchini, Diego Tagnani, Vittoria Capirossi, Federico Pinna, Andre Frankenthal
doaj +1 more source
Identifying vacancy complexes in compound semiconductors with positron annihilation spectroscopy: a case study of InN [PDF]
, 2011 We present a comprehensive study of vacancy and vacancy-impurity complexes in InN combining positron annihilation spectroscopy and ab-initio calculations.
Christian Rauch +4 more
core +2 more sources
Vibrational Feshbach Resonances Mediated by Nondipole Positron-Molecule Interactions [PDF]
, 2017 Measurements of energy-resolved positron-molecule annihilation show the existence of positron binding and vibrational Feshbach resonances. The existing theory describes this phenomenon successfully for the case of infrared-active vibrational modes which ...
Danielson, J. R. +4 more
core +2 more sources