MATEUS RAMOS DE ALMEIDA
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Resumo IPEN-doc 30136 Application of the X-ray fluorescence analysis to determine the elemental composition of Brazilian Olympic coins2023 - SILVA, ANA C.K. de S.; ZAMBONI, CIBELE B.; ALMEIDA, MATEUS R. de; SILVA, DALTON G.N. daIn this investigation, the elemental composition of Brazilian Olympic coins was investigated using Energy Dispersive X-ray Fluorescence (EDXRF) analytic technique. From the release of Olympic albums (2014, 2015, and 2016) the demand for these coins has increased and some can be worth up to 7000% more than their normal value. The analysis was performed using a compact X-ray spectrometer model X-123 SDD with Ag target. The characteristic X-ray fluorescent intensity of Ka lines were measured with a Si Drift detector (25 mm² x 500 μm) with Be window (12.5 μm). For the spectrometer calibration, certified standard solutions from Z = 14 to Z = 51 were evaluated. The results were compared with coins in current circulation. All the spectral analysis was performed using WinQxas software. The spectral analysis of Olympic coins shows Cr, Mn, Fe and Cu as majorities and peaks of various elements as traces. The 2014 and 2015 Olympic coins groups exhibited similar surface compositions for majorities and trace elements (V, Ni, Mo, Ag, In, Sn, Ce, Nd, Ir and Pb), while the 2016 group coins exhibited Nb presence as a trace element. Some differences were also identified when the comparison was made with current coins. These data provide curators with information for cataloging as well as being used to identify forgeries (heritage appreciation), important for collectors.Resumo IPEN-doc 29293 Young Scientist Project2022 - GIOVANNI, D.N.S.; KOKA, A.C.S.S.; ALMEIDA, M.R.; ZAMBONI, C.B.The use of Information and Communication Technologies (ICT) has facilitated the dissemination of nuclear knowledge and, at the same time, improved relations between specialists working in different areas of science. The growing number of initiatives, on the part of Research Centers, Universities, and even on an individual basis has been positive through social networks, websites, and blogs. The Young Scientist Project was created in 2019, by the team of the Spectroscopy and Spectrometry of Radiation Laboratory at IPEN, with the proposal to implement nuclear knowledge. The aim is to present alternative proposals for knowledge, application, and dissemination of science, with an emphasis on demystifying the nuclear sciences. The website (www.jovemcientista.com.br) design involves four menus: REPORTS where researchers talk about their career, challenges, and perspectives in the field; NUCLEAR MINUTE: where nuclear physics concepts are covered in one-minute videos; CURIOSITIES: a space where various topics are presented, whose objective is to dialogue between the various areas of scientific knowledge. In addition, within this menu, scientific content from other media is available in GARIMPO, and the menu INTERVIEWS: conducted by students to discuss its work. All the content produced on this website is available in various social media, such as, the YouTube channel (Jovem Cientista), the profile on Instagram (@jovemcientista.com.br) associated with a Facebook page (@jovemcientista.com.br), the profile on TikTok (@jovemcientista.com.br) and by Linkedin and Twiter in the editors' profile. In addition, the site provides a communication channel with the entire team. Since its creation, content has been developed in the nuclear area from basic concepts to applications of radiation in different areas, such as, the environment, dosimetry, and health, among others. The possibility of using ICT has been positive, helping to demystify and disseminate nuclear physics.Resumo IPEN-doc 29162 Propostas alternativas para o conhecimento e uso da Energia Nuclear2022 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; KOKA, A.C.; ALMEIDA, M.R.; MEDEIROS, I.M.M.A.; LEAO, A.R.