SUZANA BOTELHO
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Artigo IPEN-doc 23996 Measurement of the first Townsend ionization coefficient in a methane-based tissue-equivalent gas2017 - PETRI, A.R.; GONÇALVES, J.A.C.; MANGIAROTTI, A.; BOTELHO, S.; BUENO, C.C.Tissue-equivalent gases (TEGs), often made of a hydrocarbon, nitrogen, and carbon dioxide, have been employed in microdosimetry for decades. However, data on the first Townsend ionization coefficient (α) in such mixtures are scarce, regardless of the chosen hydrocarbon. In this context, measurements of α in a methanebased tissue-equivalent gas (CH4 – 64.4%, CO2 – 32.4%, and N2 – 3.2%) were performed in a uniform field configuration for density-normalized electric fields (E/N) up to 290 Td. The setup adopted in our previous works was improved for operating at low pressures. The modifications introduced in the apparatus and the experimental technique were validated by comparing our results of the first Townsend ionization coefficient in nitrogen, carbon dioxide, and methane with those from the literature and Magboltz simulations. The behavior of α in the methane-based TEG was consistent with that observed for pure methane. All the experimental results are included in tabular form in the Supplementary material.Artigo IPEN-doc 10682 Uso de uma camara de ionizacao de poco para medidas de atividade de fontes solidas de sup(192)Ir2005 - GONCALVES, J.A.C.; PASCHOLATI, P.R.; TRIDAPALLI, D.; RIDENTI, M.A.; BOTELHO, S.; BUENO, C.C.Artigo IPEN-doc 15092 Measurements of electron drift velocity in pure isobutane2009 - VIVALDINI, TULIO C.; LIMA, IARA B.; GONCALVES, JOSEMARY A.C.; BOTELHO, SUZANA; RIDENTI, MARCO A.; FONTE, PAULO; MANGIAROTTI, ALESSIO; PASCHOLATI, PAULO R.; TOBIAS, CARMEN C.B.Artigo IPEN-doc 15091 Measurements of the gaseous multiplication coefficient in pure isobutane2009 - LIMA, IARA B.; VIVALDINI, TULIO C.; GONCALVES, JOSEMARY A.C.; BOTELHO, SUZANA; RIDENTI, MARCO A.; FONTE, PAULO; MANGIAROTTI, ALESSIO; PASCHOLATI, PAULO R.; TOBIAS, CARMEN C.B.Artigo IPEN-doc 17009 Technique of measuring the first ionization coefficient in gases2011 - LIMA, I.B.; VIVALDINI, T.C.; MANGIAROTTI, A.; PETRI, A.R.; GONCALVES, J.A.C.; BOTELHO, S.; FONTE, P.; BUENO, C.C.Artigo IPEN-doc 15333 Automation and instrument control applied to an experimental study of electron transport dynamics in an avalanche mode resistive plate chamber2009 - RIDENTI, MARCO A.; PASCHOLATI, PAULO R.; LIMA, IARA B.; VIVALDINI, TULIO C.; BOTELHO, SUZANA; GONCALVES, JOSEMARY A.C.; BUENO, CARMEN C.Artigo IPEN-doc 17466 Determination of the first townsend coefficient in pure isobutane2010 - LIMA, IARA B.; VIVALDINI, TULIO C.; GONCALVES, JOSEMARY A.C.; BOTELHO, SUZANA; RIDENTI, MARCO A.; MANGIAROTTI, ALESSIO; FONTE, PAULO; PASCHOLATI, PAULO R.; TOBIAS, CARMEN C.B.Artigo IPEN-doc 17469 Measurements of electron drift velocity in isobutane using the pulsed townsend technique2010 - VIVALDINI, TULIO C.; LIMA, IARA B.; GONCALVES, JOSEMARY A.C.; BOTELHO, SUZANA; RIDENTI, MARCO A.; FONTE, PAULO; MANGIAROTTI, ALESSIO; PASCHOLATI, PAULO R.; TOBIAS, CARMEN C.B.Artigo IPEN-doc 12830 Activity measurements of sup(192)Ir solid sources using a well-type ionization chamber2007 - GONCALVES, J.A.C.; BOTELHO, S.; PASCHOLATI, P.R.; RIDENTI, M.A.; FRAGA, M.M.F.R.; CAMARA, J.R.; CALVO, W.A.; BUENO, C.C.Artigo IPEN-doc 14856 A dedicated setup for the measurement of the electron transport parameters in gases at large electric fields2010 - FONTE, P.; MANGIAROTTI, A.; BOTELHO, S.; GONCALVES, J.A.C.; RIDENTI, M.A.; BUENO, C.C.