MARIA DA CONCEICAO COSTA PEREIRA
Resumo
Possui graduação em Química Industrial pela Escola Superior de Química Oswaldo Cruz (1984), Mestrado pelo Instituto de Pesquisas Energéticas e Nucleares - USP (1997) e Doutorado pelo Instituto de Pesquisas Energéticas e Nucleares - USP (2006). Atualmente é pesquisadora do Instituto de Pesquisas Energéticas e Nucleares. Possui experiência na área de Química e Engenharia Nuclear, atuando principalmente nos seguintes temas: detectores de radiação, tempo de decaimento de luminescência, cintilação e crescimento de cristais cintiladores inorgânicos. Orientadora de Mestrado (Texto extraído do Currículo Lattes em 16 nov. 2021)
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Artigo IPEN-doc 29128 Zonal refining and Bridgman technique for CsI:Tl scintillation crystal growth2022 - SUZART, K.F.; PEREIRA, M.C.C.; HAMADA, M.M.; MESQUITA, C.H.This work describes the development of the crystal cesium iodide doped with thallium (CsI:Tl) for use as a radiation detector. For CsI salt purification the zonal refining methodology using a horizontal oven at a constant temperature of 700 °C was used. The high temperature region corresponds to approximately 10% of the salt bed containing (260 mm). This region moves at a speed of 50 mm/h. The crystal growth was carried out by Bridgman technique, using a vertical oven at speed of 1 mm/h.Artigo IPEN-doc 28297 Zonal refining and Bridgman technique for CsI:Tl scintillation crystal growth2021 - SUZART, K.F.; PEREIRA, M.C.C.; HAMADA, M.M.; MESQUITA, C.H.Artigo IPEN-doc 27921 Characterization of the CsI(Tl) crystalline scintillating detector produced at IPEN2021 - SUZART, K.F.; VELO, A.F.; HAMADA, M.M.; PEREIRA, M.C.C.; MESQUITA, C.H.Cesium iodide crystal activated with thallium (CsI(Tl)) is used as radiation sensor because of its favorable characteristics as scintillator, when excited by gamma radiation. This crystal has good mechanical strength and it is relatively little hygroscopic. In the present work, the CsI(Tl) crystal was grown in the Nuclear Energy Research Institute (IPEN/CNEN/SP) by Brigdman technique, in two different formats: (a) cylindric (∅ 20.1 mm x ↑ 11.9 mm) and (b) parallelepiped (12.3 mm x ↑ 19.5 mm). The scintillator spectrometry was studied through five gamma radiation sources: 99mTc (140 keV), 133Ba (355 keV) 22Na (511 keV) and 137Cs (662 keV). The crystals were coupled to a photomultiplier tube using 0.5 McStokes viscosity silicone grease as the optical interface. All electronics for signal measurements were developed at IPEN. Luminescence property of the CsI(Tl) crystal was excited by the radiation from a 137Cs source. The energy resolution of the crystalline detector was determined by the FWHM parameter, corresponding to the photopeak width at half of its height.Artigo IPEN-doc 26199 Development and characterization of CsI (Tl) crystal for use as a radiation detector2019 - SUZART, KAROLINE F.; HAMADA, MARGARIDA M.; PEREIRA, MARIA da C.C.; MESQUITA, CARLOS H. deCesium iodide crystal activated with thallium (CsI(Tl)) is used as radiation sensor because of its favorable characteristics as scintillator when excited by gamma radiation. This crystal has good mechanical strength and it is not hygroscopic. In the present work the CsI(Tl) crystal was growed in the Nuclear Energy Research Institute (IPEN/CNEN/SP) by Brigdman technique in different sizes. The scintillator response was studied through gamma radiation from 99mTc source with the energy of 140 keV. The crystals were coupled to a photomultiplier tube using 0.5 McStokes viscosity silicone grease as the optical interface. All electronics for signal measurements were developed at IPEN. Measurements of luminescence and gamma spectrometry of a 99mTc source were performed. The energy resolution of the crystals was determined by the spectrum photopeak considering its full width at half maximum (FWHM).Resumo IPEN-doc 07855 Characteristics of CsI(Tl) scintillators with different Tlsup(+) concentrations under electron and alpha particles excitation2000 - HAMADA, M.M.; COSTA, F.E.; PEREIRA, M.C.C.; KUBOTA, S.Artigo IPEN-doc 10578 Crescimento de cristais baseados em iodeto de cesio (Csl) para aplicacao como detectores de radiacao2005 - CORTESE, V.C.; PEREIRA, M.C.C.; HAMADA, M.M.Artigo IPEN-doc 10641 Estudo das caracteristicas de luminescencia dos cristais cintiladores CsI:Br e CsI:Pb crescidos pela tecnica de bridgman2005 - PEREIRA, M.C.C.; COSTA, F.E.; HAMADA, M.M.Artigo IPEN-doc 16989 Development of a Study of pure and Pbsup(2+)ions doped CsI crystals under alpha particles excitations2011 - PEREIRA, MARIA da C.C.; MADI FILHO, TUFIC; HAMADA, MARGARIDA M.Artigo IPEN-doc 16867 Study of pure and Pbsup(2+) ions doped CsI crystals under alpha particles excitations2011 - PEREIRA, MARIA da C.C.; MADI FILHO, TUFIC; HAMADA, MARGARIDA M.Artigo IPEN-doc 08296 Dependence of scintillation characteristics in the CsI(Tl) crystal on Tlsup(+) concentrations under electron and alpha particles excitations2000 - HAMADA, M.M.; COSTA, F.E.; PEREIRA, M.C.C.; KUBOTA, S.
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