A5075953158- X-ray Spectroscopy and Fluorescence Analysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Nuclear Physics and Applications
- Cultural Heritage Materials Analysis
- Ion-surface interactions and analysis
- Diamond and Carbon-based Materials Research
- Geological and Geochemical Analysis
- Electron and X-Ray Spectroscopy Techniques
- Conservation Techniques and Studies
- High-pressure geophysics and materials
- Mineralogy and Gemology Studies
- Geochemistry and Geologic Mapping
- Building materials and conservation
- Metal and Thin Film Mechanics
- Advanced Surface Polishing Techniques
- Laser Material Processing Techniques
- Crystallography and molecular interactions
- Advanced Fiber Laser Technologies
- Advanced X-ray and CT Imaging
- Geomagnetism and Paleomagnetism Studies
- Archaeology and ancient environmental studies
- Hydrocarbon exploration and reservoir analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Organic Light-Emitting Diodes Research
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2012-2024
University of Florence
2006-2021
Istituto Nazionale di Fisica Nucleare
2007-2011
The problem of finite-size effects in s=1/2 Ising systems showing slow dynamics the magnetization is investigated introducing diamagnetic impurities a Co2+-radical chain. static magnetic properties have been measured and analyzed considering peculiarities induced by ferrimagnetic character compound. dynamic susceptibility shows that an Arrhenius law observed with same energy barrier for pure doped compounds while prefactor decreases, as theoretically predicted. Multiple spin reversal has...
The LABEC laboratory, the INFN ion beam laboratory of nuclear techniques for environment and cultural heritage, located in Scientific Technological Campus University Florence Sesto Fiorentino, started its operational activities 2004, after decided 2001 to provide our applied physics group with a large dedicated applications accelerator-related analytical techniques, based on new 3 MV Tandetron accelerator. accelerator greatly improved performance existing Ion Beam Analysis (IBA) (for which...
Detectors are a key feature of the contemporary scientific approach to cultural heritage (CH), both for diagnostics and conservation. INFN-CHNet is network Italian National Institute Nuclear Physics that develops applies new instrumentation study CH. This process results in optimized traditional state-of-the-art highly innovative detection setups spectrometric techniques. Examples former X-rays, gamma-rays, visible-light particles spectrometers tailored CH applications, with performances,...
We study the role of defects in ``single-chain magnet'' CoPhOMe by inserting a controlled number diamagnetic impurities. The samples are analyzed with unprecedented accuracy particle induced x-ray emission technique, and ac dc magnetic measurements. In an external applied field system shows unexpected behavior, giving rise to double peak susceptibility. static thermodynamic properties randomly diluted Ising chain alternating $g$ values then exactly obtained via transfer matrix approach....
Silicon-vacancy (SiV) centers in diamond are gaining an increased interest for application, such as quantum technologies and sensing. Due to the strong luminescence concentrated its sharp zero-phonon line at room temperature, SiV being investigated single-photon sources communication, also temperature probes Here, we discussed strategies fabrication of based on Si-ion implantation followed by thermal activation. color high-quality single crystals have best optical properties, but...
We demonstrate the feasibility of fabricating light-waveguiding microstructures in bulk single-crystal diamond by means direct ion implantation with a scanning microbeam, resulting modulation refractive index ion-beam damaged crystal. Direct evidence waveguiding through such buried microchannels is obtained phase-shift micro-interferometric method allowing study multimodal structure propagating electromagnetic field. The possibility defining optical and photonic structures writing opens...
We performed high-temperature luminescence studies of silicon-vacancy color centers obtained by ion implantation in single crystal diamond. observed reduction the integrated fluorescence upon increasing temperature, ascribable to a transition channel with an activation energy 180 meV that populates shelving state. Nonetheless, signal decreased only 50% and 75% respect room temperature at 500 K 700 K, respectively. In addition, center is found highly photostable temperatures exceeding 800 K....
Abstract Over the years, transportable instrumentation for cultural heritage (CH) in situ measurements has noticeably widespread, due to logistic, economical and safety reasons. Ion beam analysis, a powerful set of analytical techniques, great importance CH, is instead carried out by using fixed instrumentation. To overcome this limit, Italian national Institute Nuclear Physics (INFN), CERN (European Centre Research) Opificio delle Pietre Dure (OPD), started MACHINA, “Movable Accelerator CH...
An accurate control of the optical properties single crystal diamond during microfabrication processes such as ion implantation plays a crucial role in engineering integrated photonic devices. In this work we present systematic study variation both real and imaginary parts refractive index diamond, when damaged with 2 3 MeV protons at low-medium fluences (range: 10^15 - 10^17 cm^-2). After implanting 125x125 um^2 areas scanning microbeam, pathlength implanted regions was measured laser...
At present, the use of non-destructive, non-invasive X-ray-based techniques is well established in heritage science for analysis and conservation works art. X-ray fluorescence (XRF) plays a fundamental role since it provides information on elemental composition, contributing to identification materials present superficial layers an artwork. Whenever XRF combined with capability scanning area provide distribution surface, technique referred as macro (MA-XRF). The field, which extensively...
Analytical techniques play a fundamental role in heritage science. Among them, Particle Induced X-ray Emission (PIXE) and Fluorescence (XRF) are widely used many laboratories for elemental composition analysis. Although they well-established, strong effort is put on their upgrade, making them suitable more applications. Over the years, at INFN-LABEC (the laboratory of nuclear environment cultural Italian National Institute Nuclear Physics), INFN-CHNet group, network devoted to heritage, has...