1,721,184 research outputs found
Primi risultati di spettroscopia e decadimento di ipernuclei Lambda dell'esperimento FINUDA a DAPHNE
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Historical building stability monitoring by means of a cosmic ray tracking system
No full textCosmic ray radiation is mostly composed, at sea level, by high energy muons, which are highly penetrating particles capable of crossing kilometers of rock. The ubiquitous and steady presence at the Earth's surface and the high penetration capability have motivated the use of cosmic ray radiation also in fields beyond particle physics, from geology, archeology, speleology to industrial applications and homeland security. In particular, in recent years, the novel technique of muon tomography has been proposed, with the aim of performing non invasive inspection of large non accessible volumes, material atomic number Z and density discrimination, and three dimension image reconstruction of the inspected volume. In the present paper, after a short recall of the physical principles and mathematical formalism on which muon tomography is based, a number of examples of application of the novel technique in industry and homeland security issues is given. Moreover, a new application of cosmic rays detection techniques in the field of civil engineering is proposed. The aim is the monitoring of the stability of large structures, in particular the static monitoring of historical buildings, where conservation constraints are more severe and the time evolution of the deformation phenomena under study may be of the order of months or years. The new technique may be seen, in some way, as the reverse problem of muon tomography. As a significant case study, the monitoring of the wooden vaulted roof of the Palazzo della Loggia in the town of Brescia, in Italy, has been considered. The feasibility as well as the performances and limitations of a monitoring system based on cosmic ray tracking have been studied by Monte Carlo simulation and discussed in comparison with more traditional monitoring systems
Remarks on an experimental study of the formation and decay of the pbarHe+ atomcule
No full textRecently, data on p ̄ annihilation at rest on gaseous 4He at 3 bar, collected by the Obelix Experiment at LEAR, were used to infer information on the formation and decay of the p ̄He+ atomcule. The straightforward interpretation of these data in terms of significant physical signals does not seem justified in the light of previous experimental information published by the Obelix Collaboration
Real-to-imaginary ratio for the pbar-nucleon forward amplitude from low-energy pbar-nucleus data and applicability of the Glauber theory data and applicability of the Glauber theory
No full textDetermination of the PbarN scattering amplitude from Pbar-Nucleus elastic scattering data
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