Departamento de Física
URI permanente desta comunidadehttps://repositorio.fei.edu.br/handle/FEI/785
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13 resultados
Resultados da Pesquisa
- The NUMEN project @ LNS: Status and perspectives(2019-09-03) CAPPUZZELLO, F.; AGODI, C.; ACOSTA, L.; AMADOR-VALENZUELA, P.; AUERBACH, N.; BAREA, J.; BELLONE, J. I.; BELMONT, D.; BIJKER, R.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRANCHINA, V.; BRASOLI, S.; BRISCHETTO, G.; BRUNASSO, O.; BURRELLO, S.; CALABRESE, S.; CALABRETTA, L.; CALVO, D.; CAPIROSSI, V.; CARBONE, D.; CAVALLARO, M.; CHEN, R.; CIRALDO, I.; LOMELI, E. R. C.; COLONNA, M.; D'AGOSTINO, G.; DJAPO, H.; DE GERONIMO, G.; DELAUNAY, F.; DESHMUKN, N.; DE FARIA, P. N.; ESPEJEL, R.; FERRARESI, C.; FERREIRA, J. L.; FERRETTI, J.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FLORES, A.; FOTI, A.; GALLO, G.; GARCIA-TECOCOATZI, H.; GONGORA, B.; HACISALIHOGLU, A.; HAZAR, S.; HUERTA, A.; KOTILA, J.; KUCUK, Y.; IAZZI, F.; LANZALONE, G.; LA VIA, F.; LAY, J. A.; LENSKE, H.; LINARES, R.; LONGHITANO, F.; LO PRESTI, D.; LUBIAN, J.; MA, J.; MARIN-LAMBARRI, D.; MARTINEZ, S.; MAS, J.; MEDINA, N. H.; MENDES, D. R.; MEREU, P.; MORALLES, M.; OLIVEIRA, J. R. B.; ORDONEZ, C.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PIETRALLA, N.; PINNA, F.; REITO, S.; REZA, G.; RIES, P.; RIFUGGIATO, D.; RODRIGUES, M. R. D.; RUSSO, A. D.; RUSSO, G.; SANDOVAL, S.; SANTOPINTO, E.; Roberto Santos; SGOUROS, O.; Marcilei Aparecida Guazzelli; SOLAKCI, S. O.; SOULIOTIS, G.; SOUKERA, V.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; VSEVOLODOVNA, R. I. M.; VARGAS, H.; VEGA, G.; WANG, J. S.; WERNER, V.; YANG, Y. Y.; YILDIRIN, A.; ZAGATTO, V. A. B.© 2019 Author(s).The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0υββ), by high-accuracy measurements of the cross sections of Heavy Ion (HI) induced Double Charge Exchange (DCE) reactions. Particular interest is given to the (18O,18Ne) and (20Ne,20O) reactions as tools for β+ β+ and β-β- decays, respectively. First evidence about the possibility to get quantitative information about NME from experiments is found for both kind of reactions. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction products are detected by the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to significantly increase the experimental yield, thus making feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are developed aiming at extracting the nuclear structure information from the measured cross sections.
- The NUMEN project @ LNS: Status and perspectives(2019-09-03) CAPPUZZELLO, F.; AGODI, C.; ACOSTA, L.; ALTANA, C.; AMADOR-VALENZUELA, P.; AUERBACH, N.; BAREA, J.; BELLONE, J.; BIJKER, R.; BONANNO, D.; BORELLO-LEWIN, T.; BOZTOSUN, I.; BRANCHINA, V.; BRASOLIN, S.; BRISCHETTO, G.; BRUNASSO, O.; BURRELLO, S.; CALABRESE, S.; CALABRETTA, L.; CALVO, D.; CAPIROSSI, V.; CARBONE, D.; CAVALLARO, M.; GARCIA,L. E. C.; LOMELI, E. R. C.; CHEN, R.; CIRALDO, I.; COLONNA, M.; D'AGOSTINO, G.; DELAUNAY, F.; DESHMUKH, N.; DJAPO, H.; DE GERONIMO, G.; DE LOS RIOS, K.; FERRARESI, C.; FERREIRA, J. L.; FERRETTI, J.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; GALLO, G.; GARCIA-TECOCOATZI, H.; HACISALIHOGLU, A.; HUERTA-HERNANDEZ, A.; KOTILA, Z. J.; KUCUK, Y.; IAZZI, F.; LANZALONE, G.; LAY, J. A.; LA FAUCI, L.; LA VIA, F.; LENSKE, H.; LINARES, R.; LO PRESTI, D.; LUBIAN, J.; MA. J.; MARIN-LAMBARRI, D.; RUIZ, J. M.; MEDINA, N. H.; MENDES, D. R.; MEREU, P.; MORALLES, M.; NERI, L.; OLIVEIRA, J. R. B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PIETRALLA, N.; PINNA, F.; REITO, S.; RIES, P.; RODRIGUES, M. R. D.; RUSSO, A. D.; RUSSO, G.; SANTOPINTO, E.; Roberto Santos; SERBINA, L.; SGOUROS, O.; Marcilei Aparecida Guazzelli; SOLAKCL, S. O.; SOULIOTIS, G.; SOUKERAS, V.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; HERNANDEZ, H. V.; VSEVOLODOVNA, R. I. M.; WANG, J. S.; WERNER, V.; YANG, Y. Y.; YILDIRIN, A.; ZAGATTO, V. A. B.© 2019 Author(s).The NUMEN project aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of Heavy Ion (HI) induced Double Charge Exchange (DCE) reaction cross sections. In particular, the (18O,18Ne) and (20Ne,20O) reactions are used as tools for β+β+ and β-β- decays, respectively. In the experiments, performed at INFN - Laboratory Nazionali del Sud (LNS) in Catania, the beams are accelerated by the Superconducting Cyclotron (CS) and the reaction ejectiles are detected the MAGNEX magnetic spectrometer. The measured cross sections are challengingly low (a few nb), being the total reaction cross section much larger (a few b), thus a high sensitivity and a large rejection capability are demanded to the experimental set-up. This limits the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. A major upgrade of the LNS facility is foreseen in order to increase the experimental yield of at least two orders of magnitude, still keeping the high sensitivity of the present set-up, making it feasible a systematic study of all the cases of interest. Frontiers technologies are going to be developed, to this purpose, for the accelerator and the detection systems. In parallel, advanced theoretical models are being developed in order to extract the nuclear structure information from the measured cross sections.
Artigo de evento 3 Citação(ões) na Scopus Radiation effect mechanisms in electronic devices(2013-12-01) Marcilei Aparecida Guazzelli; Roberto Santos; LEITE, F.; CUNHA, F.; CIRNE, K. H.; MEDINA, N. H.; ADDED, N.; AGUIAR, V. A. P.© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.In this work, P- and N-MOSFETs (Metal Oxide Semiconductor Field Effect Transistor) were submitted to X-ray and ion beams. CD 4007, a commercial off-the-shelf integrated circuit composed of six transistors, three P-type and three N-type, in a single package, was used. The integrated circuits were exposed to 60 MeV 35Cl ion beams using the São Paulo 8UD Pelletron Accelerator and 10 keV X-ray radiation, using a Shimadzu XRD-7000 X-ray diffractometer. The total dose effects due to ionizing radiation in MOSFET were analyzed. The results indicate Vth depends on the absorbed dose and dose rate. The deviation of Vth is higher for P-MOS, while the change in slope is higher for N-MOS. TID (Total Ionizing Dose) caused by heavy ion does not seem to affect mobility. After heat treatment, the device establishes a different equilibrium state compared to that achieved at room temperature. The heat treatment worsens the P-type characteristics and improves the N-type.Artigo de evento 1 Citação(ões) na Scopus Titanium extraction from waste NORM(2013-12-01) PEREIRA, B. R.; Marcilei Aparecida Guazzelli; FONTANA, G.; Roberto Santos; RIZZUTTO, M. A.; MEDINA, N. H.© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.The constantly growing of global agricultural production depends on the development of a whole production to be lasting and sustainable. The phosphoric acid production is directly related to the production of fertilizers, but its process of obtaining requires numerous steps and generates a lot of waste. There are several elements in some of these wastes that are very valuable and important for economy and for technological development. An example is a residue derived from a step of physical handling of the phosphate rock, containing about 30% of titanium in its composition. Titanium can be used in various applications, such as a component in high-tech metallic alloys, or, in the form of titanium dioxide, which is the form that presents the greatest value in industry. This study focus at the concentration of titanium oxide present in a residue from the phosphoric acid production, by attacking the material chemically and doing its characterization by analytical methods. This would contribute to the national titanium concentrated production increased and enhance the economic yield of the phosphoric acid production process, by transforming an unused waste in a high value product. The methodology for the concentration of titanium oxide was based in industrial extraction of titanium ores and consists of solubilizing the impurities present in the sample by means of chemical attack. It has been determined experimentally that at temperatures around 70°C, hydrochloric acid provides a better solubilization of impurities, without extracting titanium, and it is possible to obtain a residual solid phase with about 58.5% of titanium on it. The results were determined by using the Energy Dispersive X-Ray Fluorescence (EDXRF) technique. As the original sample is a Normal Occurring Radioactive Material (NORM), an analysis of Gamma Ray Spectroscopy and EDXRF were realized to determine how the radionuclides form the U and Th series were affected by the chemical treatment.- New experimental campaign of NUMEN project(2019-09-05) AGODI, C.; CAPPUZZELLO, F.; ACOSTA, L.; AMADOR-VALENZUELA, P.; AUERBACH, N.; BAREA, J.; BELLONE, J. I.; BELMONT, D.; BIJKER, R.; BONANNO, D.; BORELLO-LEWIN, T.; BOSTOZUN, I.; BRANCHINA, V.; BRASOLIN, S.; BRISCHETTO, G.; BRUNASSO, O.; BURRELLO, S.; CALABRESE, S.; CALABRETTA, L.; CALVO, D.; CAPIROSSI, V.; CARBONE, D.; CAVALLARO, M.; CHEN, R.; CIRALDO, I.; LOMELI, E. R. C.; COLONNA, M.; D' AGOSTINO, G.; DJAPO, H.; DE GERONIMO, G.; DELAUNAY, F.; DESHMUKH, N.; DE FARIA, P. N.; ESPEJEL, R.; FERRARESI, C.; FERREIRA, J. L.; FERRETTI, J.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA M.; FLORES A.; FOTI A.; GALLO G.; GARCIA-TECOCOATZI H.; GONGORA B.; HACISALIHOGLU A.; HAZAR S.; HUERTA A.; KOTIJA J.; KUCUK Y.; IAZZI F.; LANZALONE G.; LA VIA F.; LAY J. A.; LENSKE H.; LINARES R.; LONGHITANO F.; LO PRESTI D.; LUBIAN J.; MA J.; MARIN-LAMBARRI D.; MATINEZ S.; MEDINA N. H.; MENDES D. R.; MEREU P.; MORALLES M.; OLIVEIRA J. R. B.; ORDONEZ C.; PAKOU A.; PANDOLA L.; PETRASCU H.; PIETRALLA N.; PINNA F.; REITO S.; REZA G.; RIES P.; RIFUGGIATO D.; RODRIGUES M. R. D.; RUSSO A. D.; RUSSO G.; SANDOVAL S.; SANTOPINTO E.; Roberto Santos; SGOUROS O.; Marcilei Aparecida Guazzelli; SOLAKCI S. O.; SOULIOTIS G.; SOUKERAS V.; SPATAFORA A.; TORRESI D.; TUDISCO S.; VSEVOLODOVNA R. I. M.; VARGA H.; VEGA G.; WANG J. S.; WERNER V.; YANG Y. Y.; YILDIRIN A.; ZAGATTO V. A. B.© 2019 Author(s).The NUMEN main goal is the extraction from measured cross-sections of "data-driven" information on Nuclear Matrix Elements for all the systems candidate for 0νββ. The idea is to use as experimental tool Heavy Ions -Double Charge Exchange (HI-DCE) reactions. Crucial for the experimental challanges is the INFN Laboratori Nazionali del Sud (LNS) facility, made by the Superconducting Cyclotron (CS) and the MAGNEX magnetic spectrometer. The experimental measurements of HI-DCE reactions present a number of challenging aspects, since they are characterized by very low cross sections. Here it is reported the new experimental campaign of NUMEN Project.
- A focus on selected perspectives of the NUMEN project(2022-11-09) CAVALLARO, M.; AGODI, C.; BELLONE, J. I.; BRASOLIN, S.; BRISCHETTO, G. A.; BUSSA, M. P.; CALABRESE, S.; CALVO, D.; CAMPAJOLA, L.; CAPIROSSI, V.; CAPPUZZELLO, F.; CARBONE, D.; CIRALDO, I.; COLONNA, M.; DE BENEDICTIS, C.; DE GREGORIO, G.; DELAUNAY, F.; DUMITRACHE, F.; FERRARESI, C.; FINOCCHIARO, P.; FISICHELLA, M.; GALLIAN, S.; GAMBACURTA, D.; GANDOLFO, E. M.; GARGANO, A.; GIOVANNINI, M.; IAZZI, F.; LANZALONE, G.; LAVAGNO, A.; MEREU, P.; NERI, L.; PANDOLA, L.; PANERO, R.; PERSIANI, R.; PINNA, F.; RUSSO, A. D.; RUSSO, G.; SANTOPINTO, E.; SARTIRANA, D.; SGOUROS, O.; SHAR,A, V. R.; SOUKERAS, V.; SPATAFORA, A.; TORRESI, D.; TUDISCO, S.; AVANZI, L. H.; CARDOZO, E. N.; CHINAGLIA, E. F.; COSTA, K. M.; FERREIRA, J. L.; LINARES, R.; LUBIAN, J.; MASUNAGA, S. H.; MEDINA, N. H.; MORALLES, M.; OLIVEIRA, J. R. B.; SANTARELLI, T. M.; Roberto Santos; Marcilei Aparecida Guazzelli; ZAGATTO, V. A. B.; KOULOURIS, S.; PAKOU, A.; SOULIOTIS, G.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BIJKER, R.; CHAVEZ LOMELI, E. R.; GARCIA-TECOCOATZI, H.; HUERTA HERNANDEZ, A.; MARIN-LAMBARRI, D. J.; VARGA HERNANDEZ, H.; VILLAGRAN, R. G.; BOZTOSUN, I.; DAPO, H.; EKE, C.; FIRAT, S.; HACISALIHOGU, A.; KUCUK, Y.; SOLAKCI, S. O.; YILDIRIM, A.; AUERBACH, N.; BURRELLO, S.; LENSKE, H.; ISSAK, J.; PIETRALLA, N.; WERNER, V.; LAY, J. A.; PETRASCU, H.; FERRETTI, J.; KOTILA, J.; DONALDSON, L. M.; KHUMALO, T.; NEVELING. R.; PELLEGRI, L.© 2022 Institute of Physics Publishing. All rights reserved.The use of double charge exchange reactions is discussed in view of their application to extract information that may be helpful to determinate the nuclear matrix elements entering in the expression of neutrinoless double beta decay half-life. The strategy adopted in the experimental campaigns performed at INFN - Laboratori Nazionali del Sud and in the analysis methods within the NUMEN project is briefly described, emphasizing the advantages of the multi-channel approach to nuclear reaction data analysis. An overview on the research and development activities on the MAGNEX magnetic spectrometer is also given, with a focus on the chosen technological solutions for the focal plane detector which will guarantee the performances at high-rate conditions.
- Heavy-Ion-Induced Avalanche Multiplication in Low-Voltage Power VDMosfet(2021-09-13) ALBERTON. S. G.; MEDINA, N. H.; ADDED, N.; AGUIAR, V. A. P.; Marcilei Aparecida Guazzelli; Roberto Santos© 2021 IEEE.Lackner's theory for avalanche multiplication in semiconductor devices provides physical interpretation for the model parameters and obtaining them through experimental methods is necessary. In this work, the charge collection mechanisms of heavy-ion-induced avalanche multiplication in power MOSFETs are studied based on Lackner's impact ionization model. The heavy-ion-induced impact ionization coefficients were estimated by comparing collected charge values obtained from computational simulations and experimental measurements.
- COTS Tolerant to Total Ionizing Dose (TID): AlGaN/GaNbased transistor 10 KeV X-ray Analysis(2022-11-09) BOAS, A. C.V.; ALBERTON, S. G.; DE MELO, M. A. A.; Roberto Santos; Renato Giacomini; MEDINA, N. H.; SEIXAS, L. E.; FINCO, S.; PALOMO, F. R.; Marcilei Aparecida Guazzelli© 2022 Institute of Physics Publishing. All rights reserved.Gallium nitride commercial transistors (GaN FET) are great candidates as power devices tolerant to the effects of Total ionizing dose (TID). Therefore, we have evaluated its robustness by analysing parameters in its characteristic parameters. Devices were exposed to a 10 keV X-ray source accumulating a total of 350 krad(Si). However, results indicate that the tested components are more tolerant to the effects of TID when in on-state mode rather than the off-mode, that is, when the device is working, which is good news for COTS applications in environments subject to the effects of ionizing radiation.
- Charge deposition analysis of heavy-ion-induced single-event burnout in low-voltage power VDMOSFET(2022-10-05) ALBERTON, S. G.; AGUIAR, V. A. P.; MEDINA, N. H.; ADDED, N.; MACCHIONE, E. L. A.; MENEGASSO, R.; CESARIO. G. J.; SANTOS, H. C.; SCARDUELLI, V. B.; ALCANTARA-NUNEZ, J. A.; Marcilei Aparecida Guazzelli; Roberto Santos; FLECHAS, D.© 2022 Elsevier LtdThe heavy-ion-induced single-event burnout (SEB) risk in power MOSFETs (metal-oxide-semiconductor field-effect transistors) can be assessed in ground facilities, although it is costly and time-demanding. For this reason, there have been few experimental studies dedicated to investigate the relevant parameter related to the description of ion-induced SEB phenomenon. In this work the heavy-ion-induced SEB in a low-voltage power VDMOSFET (vertical double-diffused MOSFET) is studied using several ion-energy combinations. A self-consistent statistical analysis is carried out in order to elucidate the relationship between charge deposition and SEB triggering. Experimental data is compared to a predictive model from the literature for SEE (single-event effect) worst-case prediction in power MOSFETs, supporting for the first time its relevance to the worst-case prediction in the SEB mechanism.
- X-ray radiation effects in overlapping circular-gate MOSFET's(2011-09-23) DE LIMA, J. A.; Marcilei Aparecida Guazzelli; CIRNE, K. H.; Roberto Santos; MEDINA, N. H.IV-characteristics from ELT Overlapping Circular-Gate Transistors (O-CGT's) and rectangular-gate transistors are cross-checked after X-ray exposure. No degradation on O-CGT subthreshold behavior observed for doses up to 2.3 Grad. Devices were prototyped on standard 0.35 μm CMOS process. © 2011 IEEE.