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Your search keyword '"Montereali R. M."' showing total 388 results
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388 results on '"Montereali R. M."'

58. SNOM images of X-rays radiographs at nano-scale stored in a thin layer of Lithium Fluoride

Author

Oliva C., Ustione A., Almaviva S., Baldacchini G., Bonfigli F., Flora F., Lai A., Montereali R. M., Faenov A.Ya., Pikuz T.A., Francucci M., Gaudio P., Martellucci S., Richetta M., Reale L., and Cricenti A.

Subjects
genetic structures, eye diseases
Abstract

In this work, we report a method to observe soft X-ray radiographs at nanoscale of various kind of samples, biological and metallic, stored in a thin layer of lithium fluoride, employing scanning near-field optical microscopy with an optical resolution that reaches 50 nm. lithium fluoride material works as a novel image detector for X-ray nano-radiographs, due to the fact that extreme ultraviolet radiation and soft X-rays efficiently produce stable point defects emitting optically stimulated visible luminescence in a thin surface layer. The bi-dimensional distribution of the so-created defects depends on the local nanostructure of the investigated sample.

Published
2008

63. Optical Nanospectroscopy Applications in Material Science

Author

Cricenti, A., Longo, G., Ustione, A., Mussi, Valentina, Generosi, R., Luce, M., Rinaldi, M., Perfetti, P., Vobornik, D., Margaritondo, G., Sanghera, J. S., Thielen, P., Aggarwal, I. D., Ivanov, B., Miller, J. K., Haglund, R., Tolk, N. H., CONGIU CASTELLANO, A., Rizzo, M. A., Piston, D. W., Somma, F., Baldacchini, G., Marolo, T., Flora, F., Montereali, R. M., Faenov, A., and Pikuz, T.

Published
2004

70. Direct writing of fluorescent patterns on lif films by x-ray microprobe

Author

Larciprete R., Gregoratti L., Danailov M., Montereali R. M., Bonfigli F., and Kiskinova M.

Abstract

Fluorescent patterns with submicron dimensions have been obtained by creating stable F-3(+) and F-2 color centers in LiF films using a focused x-ray beam provided at the ELETTRA synchrotron radiation facility. The patterns were written by scanning the LiF specimen with respect to the x- ray microprobe. In these attempts, using an x-ray microspot with a diameter of 100 nm and a flux density greater than or equal to10(9) photons/s, we generated similar to500-nm-wide lines efficiently emitting in the visible spectral region when excited by blue light at 458 nm. Preliminary results indicate that the spectral distribution of the emitted luminescence can be changed by varying the photon dose delivered to the sample.

Published
2002

71. Lithium fluoride films and crystals containing metallic colloids studied by scanning near-field optical microscopy

Author

Mussi, Valentina, Cricenti, A., Montereali, R. M., Nichelatti, E., Scaglione, S., Somma, F., V., Mussi, A., Cricenti, R. M., Montereali, E., Nichelatti, S., Scaglione, and Somma, Fabrizia

Subjects
Condensed Matter::Materials Science, Quantitative Biology::Neurons and Cognition, Physics::Medical Physics, Physics::Optics, Physics::Atomic Physics
Abstract

LiF films and crystals containing lithium colloids have been studied by Scanning Near-Field Optical Microscope (NSOM). Scattering phenomena and possible wave-guided modes have been observed studying the physical mechanism of the interaction between the LiF samples and an external laser source

Published
2002
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72. Fluorescence measurements of F2 color center nanostructures by an apertureless SNOM

Author

Sakina Benrezzak, Pierre-Michel Adam, Jean-Louis Bijeon, Pascal Royer, Guy, S., Jacquier, B., Paul Moretti, Piccinini, M., Menchini, F., Montereali, R. M., Christian Seassal, Hervé RIGNEAULT, Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Déchets Eaux Environnement Pollutions (DEEP), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), ENEA C.R. Frascati, Via E. Fermi, 45, 00044 Frascati, Roma, Italy, affiliation inconnue, Advanced Physical Technologies, Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), INL - Nanophotonique (INL - Photonique), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), and VU VAN, Jean-Baptiste

Subjects
[SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2000

79. Fine structure of the absorption and emission spectra of Ni2+-ions in BaLiF3

Author

Martins, E., Baldochi, S. L., Morato, S. P., Vieira Jr, N. D., Luci, A., Casalboni, M., Grassano, U. M., Baldacchini, G., Marco Cremona, Montereali, R. M., Krausz, E., and Riley, M.

Subjects
Radiation, Nuclear Energy and Engineering, Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin), Settore FIS/03 - Fisica della Materia
Published
1995

99. Calibration of GafChromic EBT3 for absorbed dose measurements in 5 MeV proton beam and 60Co γ-rays.

Author

Vadrucci, M., Esposito, G., Ronsivalle, C., Cherubini, R., Marracino, F., Montereali, R. M., Picardi, L., Piccinini, M., Pimpinella, M., Vincenti, M. A., and De Angelis, C.

Subjects
INTENSITY modulated radiotherapy, PROTON linear accelerator, RADIATION doses, EVIDENCE-based medicine, RADIATION dosimetry, SILICON surfaces
Abstract

Purpose: To study EBT3 GafChromic film in low-energy protons, and for comparison purposes, in a reference 60Co beam in order to use it as a calibrated dosimetry system in the proton irradiation facility under construction within the framework of the Oncological Therapy with Protons (TOP)-Intensity Modulated Proton Linear Accelerator for RadioTherapy (IMPLART) Project at ENEA-Frascati, Italy. Methods: EBT3 film samples were irradiated at the Istituto Nazionale di Fisica Nucleare--Laboratori Nazionali di Legnaro, Italy, with a 5 MeV proton beam generated by a 7 MV Van de Graaff CN accelerator. The nominal dose rates used were 2.1 Gy/min and 40 Gy/min. The delivered dose was determined by measuring the particle fluence and the energy spectrum in air with silicon surface barrier detector monitors. A preliminary study of the EBT3 film beam quality dependence in low-energy protons was conducted by passively degrading the beam energy. EBT3 films were also irradiated at ENEA-National Institute of Ionizing Radiation Metrology with gamma radiation produced by a 60Co source characterized by an absorbed dose to water rate of 0.26 Gy/min as measured by a calibrated Farmer type ionization chamber. EBT3 film calibration curves were determined by means of a set of 40 film pieces irradiated to various doses ranging from 0.5 Gy to 30 Gy absorbed dose to water. An EPSON Expression 11000XL color scanner in transmission mode was used for film analysis. Scanner response stability, intrafilm uniformity, and interfilm reproducibility were verified. Optical absorption spectra measurements were performed on unirradiated and irradiated EBT3 films to choose the most sensitive color channel to the dose range used. Results: EBT3 GafChromic films show an under response up to about 33% for low-energy protons with respect to 60Co gamma radiation, which is consistent with the linear energy transfer dependence already observed with higher energy protons, and a negligible dose-rate dependence in the 2-40 Gy/min range. Short- and long-term scanner stabilities were 0.5% and 1.5%, respectively; film uniformity and reproducibility were better than 0.5%. Conclusions: The main purpose of this study was to implement EBT3 dosimetry in the proton low-energy radiobiology line of the TOP-IMPLART accelerator, having a maximum energy of 7 MeV. Low-energy proton and 60Co calibrated sources were used to investigate the behavior of film response vs to be written in italicum dose. The calibration in 5 MeV protons is currently used for dose assessment in the radiobiological experiments at the TOP-IMPLART accelerator carried out at that energy value. [ABSTRACT FROM AUTHOR]

Published
2015
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