A short description of the muon tomography demonstrator at the INFN Laboratori Nazionali di Legnaro near Padua, Italy, is given and the principal achievements owing to the data collected at that ...experimental facility are presented. In particular, the feasibility studies for several applications based on the muon-tomographic technology, within national and European projects, are discussed. The experimental problems and the procedures used to improve the performance are underlined. In addition, new activities and the related detector optimization are illustrated.This article is part of the Theo Murphy meeting issue 'Cosmic-ray muography'.
Light output of EJ228 scintillation neutron detectors Stevanato, L.; Fabris, D.; Hao, Xin ...
Applied radiation and isotopes,
February 2011, 2011-Feb, 2011-02-00, 20110201, Letnik:
69, Številka:
2
Journal Article
Recenzirano
The light output of neutron detectors based on the plastic scintillator EJ228 is studied as a function of neutron energy using a time tagged 252Cf source. Calibration of the light output scale is ...performed by fitting the experimental distribution of Compton scattering events of photons from a 22Na source with a response function obtained by Gaussian smearing of the predicted line-shape. The light output curve as well as the pulse height resolution for the EJ228 scintillators is very close (within 5%) to those recently reported for NE213 type organic liquid scintillators.
A new laboratory facility for non-destructive analysis (NDA) using a time-tagged 252Cf source is presented. The system is designed to analyze samples having maximum size of about 20×25cm2, the ...material recognition being obtained by measuring simultaneously total and energy dependent transmission of neutrons and gamma rays. The equipment technical characteristics and performances of the NDA system are presented, exploring also limits due to the sample thickness. Some recent applications in the field of cultural heritage are presented.
► Tagged 252Cf source setup. ► Material recognition and sample imaging with measurements of gamma ray and neutron transmission. ► Material identification via energy dependent neutron and gamma ray transmission measurements. ► Identification of layered material. ► Effects due to the sample thickness on the above identification techniques.
Clustering in alpha conjugate nuclei Schmidt, K.; Kim, E. J.; Wuenschel, S. ...
EPJ Web of Conferences,
01/2015, Letnik:
88
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
Characteristics of the decay of alpha like nuclei produced in various reactions with alpha conjugate nuclei are discussed. We observe a significant number of events in which a large fraction of the ...system breaks up into alpha-conjugate nuclei. Lighter fragments in the various decay channels appear to originate from a neck-like region between 4 and 7 cm/ns whereas the heavier fragments appear to originate from velocities near the beam velocity. This behavior is consistent with a hierarchy effect that cannot be explained by statistical processes.
A portable sealed neutron generator has been modified to produce 14MeV tagged neutron beams with an embedded YAP:Ce scintillation detector. The system has been tested by detecting the coincident ...gamma-rays produced in the irradiation of a graphite sample by means of a standard NaI(Tl) scintillator. Time resolution of about δt=4–5ns (FWHM) has been measured. The sealed neutron tube has been operated up to 107neutron/s. Possible applications in non-destructive assays and future developments of the Tagged Neutron Inspection System concept are discussed.
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