V. Bonvicini
A5037007607- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Solar and Space Plasma Dynamics
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- CCD and CMOS Imaging Sensors
- Ionosphere and magnetosphere dynamics
- Medical Imaging Techniques and Applications
- Muon and positron interactions and applications
- Advanced X-ray and CT Imaging
- Geomagnetism and Paleomagnetism Studies
- Atomic and Molecular Physics
- Atmospheric Ozone and Climate
- Advanced X-ray Imaging Techniques
- Scientific Research and Discoveries
- X-ray Spectroscopy and Fluorescence Analysis
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2015-2024
University of Trieste
2015-2024
Istituto Nazionale di Fisica Nucleare
2005-2024
University of Tübingen
2024
Institute of Space Sciences
2024
Consejo Superior de Investigaciones Científicas
2024
University of Pavia
2024
Consorzio Roma Ricerche
2024
Georgi Nadjakov Institute of Solid State Physics
2024
Bulgarian Academy of Sciences
2024
Protons and helium nuclei are the most abundant components of cosmic radiation. Precise measurements their fluxes needed to understand acceleration subsequent propagation rays in our Galaxy. We report precision proton spectra rigidity range 1 gigavolt 1.2 teravolts performed by satellite-borne experiment PAMELA (payload for antimatter matter exploration light-nuclei astrophysics). find that spectral shapes these two species different cannot be described well a single power law. These data...
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and antiproton-to-proton ratio which extends previously published measurements down 60 MeV up 180 GeV in kinetic energy. During 850 days data acquisition approximately 1500 antiprotons were observed. are consistent with purely secondary production Galaxy. More precise models required for complete interpretation results.
A new measurement of the cosmic-ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with PAMELA experiment, which was launched into low-Earth orbit on-board Resurs-DK1 satellite on June 15th 2006. During 500 days data collection a total about 1000 antiprotons have been identified, including above an energy 20 GeV. high-energy are tenfold improvement in statistics respect to all previously published data. follow trend expected from secondary...
Precision measurements of the electron component in cosmic radiation provide important information about origin and propagation rays Galaxy. Here we present new results regarding negatively charged electrons between 1 625 GeV performed by satellite-borne experiment PAMELA. This is first time that cosmic-ray have been identified above 50 GeV. The spectrum can be described with a single power law energy dependence spectral index -3.18 +- 0.05 region influenced solar wind (> 30 GeV). No...
Precision measurements of the positron component in cosmic radiation provide important information about propagation rays and nature particle sources our Galaxy. The satellite-borne experiment PAMELA has been used to make a new measurement cosmic-ray flux fraction that extends previously published up 300 GeV kinetic energy. combined energy spectrum unique tool constrain interpretation models. During recent solar minimum activity period from July 2006 December 2009 approximately 24500...
The energy spectra of galactic cosmic rays carry fundamental information regarding their origin and propagation. These spectra, when measured near Earth, are significantly affected by the solar magnetic field. A comprehensive description radiation must therefore include transport modulation inside heliosphere. During end last decade Sun underwent a peculiarly long quiet phase well suited to study processes. In this paper we present proton from July 2006 December 2009 PAMELA. large collected...
The authors evaluated the effect on mammographic examinations of use synchrotron radiation to detect phase-perturbation effects, which are higher than absorption effects for soft tissue in energy range 15–25 keV. Detection was possible because high degree coherence sources. Synchrotron images were obtained a phantom and vitro breast specimens compared with conventional studies. On basis grades assigned by three reviewers, image quality former considerably higher, delivered dose fully compatible.
Phase contrast x-ray imaging is a powerful technique for the detection of low-contrast details in weakly absorbing objects. This method possible relevance field diagnostic radiology. In fact, within soft tissue does not give satisfactory results conventional absorption radiology, mammography being typical example. Nevertheless, up to now all applications phase technique, carried out on thin samples, have required radiation doses substantially higher than those delivered radiological...
Precision measurements of the electron component in cosmic radiation provide important information about origin and propagation rays Galaxy not accessible from study cosmic-ray nuclear components due to their differing diffusion energy-loss processes. However, when measured near Earth, effects modulation galactic heliosphere, particularly significant for energies up at least 30 GeV, must be properly taken into account. In this paper (e^-) spectra by PAMELA down 70 MeV July 2006 December 2009...
The propagation of cosmic rays inside our galaxy plays a fundamental role in shaping their injection spectra into those observed at Earth. One the best tools to investigate this issue is ratio fluxes for secondary and primary species. boron-to-carbon (B/C) ratio, particular, sensitive probe mechanisms. This paper presents new measurements absolute boron carbon nuclei, as well B/C from PAMELA space experiment. results span range 0.44 - 129 GeV/n kinetic energy data taken period July 2006 March 2008.
Precise measurements of the time-dependent intensity low energy ($<50$ GeV) galactic cosmic rays are fundamental to test and improve models which describe their propagation inside heliosphere. Especially, data spanning different solar activity periods, i.e. from minimum maximum, needed achieve comprehensive understanding such physical phenomenon. The phase between 23$^{rd}$ 24$^{th}$ cycles was peculiarly long, extending up beginning 2010 followed by maximum phase, reached during early 2014....
We report on a new measurement of the cosmic ray antiproton spectrum. The data were collected by balloon-borne experiment CAPRICE98, which was flown 1998 May 28-29 from Fort Sumner, New Mexico. used NMSU-WiZard/CAPRICE98 magnet spectrometer equipped with gas Ring Imaging Cherenkov (RICH) detector, time-of-flight system, tracking device consisting drift chambers and superconducting magnet, silicon-tungsten calorimeter. RICH detector first ever capable mass-resolving charge-one particles at...
Using 13.5 inverse fb of e+e- annihilation data collected with the CLEO II detector we have observed a narrow resonance in Ds*+pi0 final state, mass near 2.46 GeV. The search for such state was motivated by recent discovery BaBar Collaboration at 2.32 GeV, DsJ*(2317)+ that decays to Ds+pi0. Reconstructing Ds+pi0 and states data, observe peaks both corresponding reconstructed difference distributions, dM(Dspi0)=M(Dspi0)-M(Ds) dM(Ds*pi0)=M(Ds*pi0)-M(Ds*), them values 350 MeV. We interpret...