A5101521320- Cultural Heritage Materials Analysis
- Astrophysics and Cosmic Phenomena
- Building materials and conservation
- Gamma-ray bursts and supernovae
- Spectroscopy and Quantum Chemical Studies
- Conservation Techniques and Studies
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Radio Astronomy Observations and Technology
- NMR spectroscopy and applications
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- X-ray Spectroscopy and Fluorescence Analysis
- Material Dynamics and Properties
- Advanced NMR Techniques and Applications
- Maritime and Coastal Archaeology
- Mineralogy and Gemology Studies
- Archaeology and ancient environmental studies
- Thermodynamic properties of mixtures
- Ancient Mediterranean Archaeology and History
- Particle Detector Development and Performance
- X-ray Diffraction in Crystallography
- Astro and Planetary Science
- Particle Accelerators and Free-Electron Lasers
- Zeolite Catalysis and Synthesis
University of Trieste
2009-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2003-2024
Institute for Fundamental Physics of the Universe
2023
Agostino Gemelli University Polyclinic
2020
Istituti di Ricovero e Cura a Carattere Scientifico
2020
Università Cattolica del Sacro Cuore
2012-2020
University of Udine
2009-2019
University of Messina
2005-2016
Terra
2014
Fondazione Bruno Kessler
2008
Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with large acceptance exceeding 2 m;{2} sr at 300 GeV. Building on analysis, we have developed efficient detection strategy which provides sufficient background rejection for measurement of steeply falling spectrum up to 1 TeV. Our high precision data show that falls energy E-3.0 and does not exhibit prominent spectral features. Interpretations in terms conventional diffusive...
Cosmic rays are particles (mostly protons) accelerated to relativistic speeds. Despite wide agreement that supernova remnants (SNRs) the sources of galactic cosmic rays, unequivocal evidence for acceleration protons in these objects is still lacking. When encounter interstellar material, they produce neutral pions, which turn decay into gamma rays. This offers a compelling way detect sites protons. The identification pion-decay has been difficult because high-energy electrons also via...
Microquasar Spotted Microquasars are binary star systems where a normal sheds matter onto neutron or black hole, generating x-ray radiation and jets of material moving at relativistic speeds. have proved difficult to detect in high-energy gamma rays (> 100 megaelectron volts). Using the Fermi Large Area Telescope, Abdo et al. (p. 1512 , published online 26 November; see Perspective by Bignami ) now report detection variable gamma-ray emission from microquasar Cygnus X-3. The flux is...
Based on the experience gained during four and a half years of mission, Fermi -LAT collaboration has undertaken comprehensive revision event-level analysis going under name Pass 8. Although it is not yet finalized, we can test improvements in new event reconstruction with special case prompt phase bright Gamma-Ray Bursts (GRBs), where signal to noise ratio large enough that loose selection cuts are sufficient identify gamma- rays associated source. Using reconstruction, have re-analyzed ten...
Abstract Water adsorbed in nanoporous silica glass has been investigated by Raman spectroscopy. The analysis was performed as a function of temperature (from + 5 to 75 °C), pore diameter (25 and Å) changing the nature substrate hydrophilic hydrophobic) order understand role played on dynamic peculiarities water arrangements both bare geometrical confinement specific interaction with surface. experimental spectra, collected intra‐molecular OH stretching vibrational region, have decomposed...
The Large Area Telescope (LAT) instrument on the Fermi mission will reveal rich spectral and temporal gamma-ray burst (GRB) phenomena in >100 MeV band. synergy with Fermi's Gamma-ray Burst Monitor detectors link these observations to those well explored 10–1000 keV range; addition of band resolve theoretical uncertainties about emission both prompt afterglow phases. Trigger algorithms be applied LAT data onboard spacecraft ground. sensitivity triggers differ because available computing...
In order to explore the influence of cation substitution on vibrational dynamics water molecules in zeolites, evolution structural properties O–H stretching band fully hydrated Na–A and Mg-exchanged A zeolites has been studied, for different percentages induced ion exchange, by Fourier transform infrared attenuated total reflection spectroscopy as a function temperature. The differences revealed shapes have accounted fitting spectra sum four components, corresponding exhibiting types...
Abstract Numerous samples of archaic transport Corinthian B type amphorae coming from the archaeological excavations Gela (Sicily, South Italy) were analysed using non‐destructive X‐ray fluorescence (portable InnovX‐Systems ‘Alpha 4000’). Between 6th and 5th century BC diffused throughout Western Mediterranean regions Greece. Some researchers assigned these to different production areas, both in Southern Italy Greece, although, up now, exact attribution centres is still under discussion. In...
In the last decade, Raman spectroscopy has been used for routine investigation gemmological purposes, being non‐destructive and non‐invasive. addition, this technique grants short measurement times without any sample preparation. context, work is focused on spectroscopic characterization of different kinds blue gems, including sapphires, by comparing performance a handheld instrumentation along with micro‐Raman spectrometer, aim to provide certification get information provenance gems. The...
ABSTRACT Extreme high-energy-peaked BL Lac objects (EHBLs) are an emerging class of blazars. Their typical two-hump-structured spectral energy distribution (SED) peaks at higher energies with respect to conventional Multiwavelength (MWL) observations constrain their synchrotron peak in the medium hard X-ray band. gamma-ray SED above GeV band, and some it extends up several TeV. Up now, only a few EHBLs have been detected TeV range. In this paper, we report detection EHBL 2WHSP...
The perturbation of water 'sorbed' in samples zeolites different structural type, genesis, and cation composition (K-, Na-, Mg- Ca-rich zeolites), namely the CHA framework a synthetic K-chabazite, LTA Na-A Mg50-A zeolites, NAT natural scolecite, has been studied by FTIR-ATR spectroscopy, −10 to +80 °C temperature range. aim was show how differences chemical and/or topology zeolite and, particular, possibility for guest molecules develop guest–guest host–guest interactions, lead substantial...
The aim of this study was to evaluate the antibacterial properties graphene oxide (GO) against
The present work reports a detailed investigation on the speciation of iron in pigments decorated pottery fragments cultural heritage relevance. come from Gioiosa Guardia archaeological site area `Strait Messina' (Sicily, Southern Italy), and date back to VI–V century BC. purpose this study is characterize main pigmenting agents responsible for dark-red coloration specimens using non-destructive analytical techniques such as synchrotron radiation X-ray absorption spectroscopy (SR-XAS), well...
The preciousness of historical artifacts leads to the performance nondestructive and/or microdestructive analyses, especially when archeological finds are stored in museums. PXRF spectrometry represents a powerful technique for chemometric study materials, alternative more usual destructive X‐ray‐based methods. A large set limestones belonging several formations cropping out Hyblean area (south‐eastern Sicily, Italy) was analyzed by means instrument. main goal test potentiality...
The aim of this work is to throw light on the archaic production ‘Corinthian B’ amphorae, which are widely diffused in Western Mediterranean basin and also present Greece, but whose geographical provenance still under discussion. We analysed a group 37 samples belonging different ceramic classes dated sixth fifth centuries bc . In particular, there were 19 sherds trade amphorae so‐called type, from archaeological excavations Gela (Sicily, Italy). As comparison, we investigated 18 tiles local...
A population of globular clusters (GCs) has been recently established by the Fermi-LAT telescope as a new class GeV $\gamma$-ray sources. Leptons accelerated to TeV energies, in inner magnetospheres MSPs or their wind regions, should produce $\gamma$-rays through inverse Compton scattering dense radiation field from huge stars. We have conducted deep observations cluster M15 with MAGIC telescopes and used 165 hrs order search for emission. strong upper limit on flux $<3.2\times...
The Middle Bronze Age in Sicily (15th-13th century BC) represents a crucial moment the evolution of Prehistoric pottery production. However, scarcity specific petrographic and chemical studies has represented until now serious interpretative handicap for archaeologists. recent study an important complex from site Grotte di Marineo (Licodia Eubea, Catania), offers possibility to add new significant data this field. analyses, carried out on group diagnostic samples represent 13% whole complex....