A5009391118- X-ray Spectroscopy and Fluorescence Analysis
- Cultural Heritage Materials Analysis
- Conservation Techniques and Studies
- Building materials and conservation
- Nuclear Physics and Applications
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced X-ray and CT Imaging
- Advanced X-ray Imaging Techniques
- Radiation Effects in Electronics
- Archaeology and ancient environmental studies
- Pharmaceutical Practices and Patient Outcomes
- Pacific and Southeast Asian Studies
- Advanced Electrical Measurement Techniques
- Sensor Technology and Measurement Systems
- Advancements in Semiconductor Devices and Circuit Design
- Cultural, Media, and Literary Studies
- Geology and Paleoclimatology Research
- Nuclear physics research studies
- Archaeological and Geological Studies
- Scientific Measurement and Uncertainty Evaluation
- Youth, Drugs, and Violence
- Psychology and Mental Health
- Education and Digital Technologies
- Metallurgy and Cultural Artifacts
Universidade de São Paulo
2009-2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2015-2018
Universidade Cidade de São Paulo
2018
Universidade Federal Fluminense
2012-2017
A novel mobile XRF scanner combining MA-XRF and micro-XRF techniques allowing near real-time elemental imaging of macroscopic paintings.
A full field-X-ray camera (FF-XRC) was developed for performing the simultaneous mapping of chemical elements with a high lateral resolution. The device is based on conventional CCD detector coupled to straight shaped polycapillary. Samples are illuminated at once broad primary beam that can consist X-rays or charged particles in two different analytical setups. characteristic photons induced samples guided by polycapillary allowing elemental imaging without need scanning. single photon...
Abstract In this work we explore the radiocarbon ( 14 C) signal as an independent tool to assess year of formation individual tree rings tropical species in northern Brazil. Three different were analyzed work: Dipteryx magnifica , Enterolobium maximum and Hymenolobium petraeum . The studied samples are from stem only one each species, all cut down 2008 Porto Trombetas, Pará, Individual identified based on wood anatomy they counted bark pith. Several selected for C analysis order cover...
This work describes the new facility for applied nuclear physics at University of Sao Paulo, mainly irradiation electronic devices. It is a setup composed quadrupole doublet beam focusing/defocusing plus multiple scattering through gold foils to produce low intensity, large-area, and high-uniformity heavy-ion beams from 1H 107Ag. Beam intensities can be easily adjusted 102 particles cm2/s hundreds nA an area as large 2.0 cm2 uniformity better than 90%. Its chamber has high-precision...
We report a proof of concept constructing an experimental setup to explore the imaging capability single X-ray detector, simulating pixelated measure EDXRF (Energy Dispersive Fluorescence) and EDXRD Diffraction) image spectra simultaneously. Combining conventional rotating anode Cu source assembling detector (Si-PIN Amptek, 139 eV at 5.98 keV) on computer controlled XY stage, proxy was constructed for measurement simultaneous same spot sample. The main advantages this are virtual need sample...
The chemical characterization of the black gloss on ancient pottery is, since several years, object different scientific investigations. Among typologies gloss, Attic one is most refined, because it prepared by using a fine suspension an illitic clay applied surface body so that, after oxiding‐reducing‐oxiding firing cycle at high temperature (800–950 °C), reaches typical shiny aspect. Red figure vases were largely produced in South Italy often reaching artistic level. This case Sicilian red...
This work describes new developments in the external beam setup of Laboratory Material Analysis with Ion Beams University São Paulo (LAMFI-USP). was designed to be a versatile analytical station analyze broad range samples. In recent developments, we seek Rutherford Backscattering Spectroscopy (RBS) analysis complement Particle Induced X-ray Emission (PIXE) measurements. presents initial results RBS as well improve energy resolution measurements, particular tests for sources degradation....
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Hellen C. Santos, Márcia Rizzutto, Nemitala Added, Fernando Espinoza‐Quiñones; A PIXE Study of Trace Elements in Sediments Toledo River, Paraná, Brazil. AIP Conf. Proc. 3 June 2009; 1139 (1): 147–150. https://doi.org/10.1063/1.3157798 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends...
Abstract The study of thin and thick materials every time is a challenge in X-ray analysis. calculation the sensitivity curve Energy Dispersive Fluorescence (ED-XRF) Particle Induced Emission (PIXE) systems allows for better quantitative analysis also determination concentration chemical element given sample from its intensity. can be found through elemental standards, samples with well-defined superficial densities ( μg / cm 2 ) that allow system to elements present standards. From these...
We present the results of 8Li(p,α)5He and 8Li(p,p)8Li reactions measured at RIBRAS (Radioactive Ion Beams in Brazil) system. The experiment was realized inverse kinematics using a thick [CH2]n polyethylene target an incident 8Li beam, produced by RIBRAS. Using method, complete excitation function could be between Ecm = 0.2 − 2.1 MeV, which includes Gamow peak energy region. reaction, populating resonances 16.888 19.0 MeV 9Be, obtained[1] were fitted R-matrix calculations. This study shed...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation C. L. Rodrigues, T. F. Silva, N. Added, H. Santos, M. Tabacniks; Production characterization of a nitrogen-implanted Fe standard to calibrate PIGE measurements. AIP Conference Proceedings 11 November 2014; 1625 (1): 151–154. https://doi.org/10.1063/1.4901782 Download citation file: Ris (Zotero) Reference...
Neste artigo pretendemos contribuir para a fundamentação do trabalho professor no ensino de leitura e produção texto. Apresentamos análise dados, com qual se testa hipótese da oposição semântica como recurso expressivo humor em Comédias Vida Privada – Edição Especial Escolas, Verissimo. O objetivo é demonstrar aplicação uma ferramenta textos longos, já que os trabalhos acadêmicos versam sobre o fazem relação principalmente í s piadas. Partimos tese há um princípio cooperação próprio dos não...
Since 2012, a compact 250 kV Single Stage accelerator (250 kV-SSAMS) has been installed at Instituto de Física, Universidade Federal Fluminense, for radiocarbon analysis of natural samples. The system presents two magnets, mass selection prior and post the gas stripper, an electrostatic spherical analyzer (ESA). overall performance machine makes it suitable experimental researches in atomic collisions, particular studies stopping power projectiles energies below 25 keV/u. Here we report on...