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New thermal neutron calibration channel at LNMRI/IRD

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dc.contributor.author Astuto, Achilles
dc.contributor.author Patrão, Karla Cristina de Souza
dc.contributor.author Fonseca, Evaldo Simões da
dc.contributor.author Pereira, Walsan Wagner
dc.contributor.author Lopes, Ricardo Tadeu
dc.date.accessioned 2019-02-18T20:03:07Z
dc.date.available 2019-02-18T20:03:07Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/2050011876/974
dc.description.abstract A new standard thermal neutron flux unit was designed in the National Ionizing Radiation Metrology Laboratory (LNMRI) for calibration of neutron detectors. Fluence is achieved by moderation of four 241Am-Be sources with 596 GBq each, in a facility built with graphite and paraffin blocks. The study was divided into two stages. First, simulations were performed using MCNPX code in different geometric arrangements, seeking the best performance in terms of fluence and their uncertainties. Last, the system was assembled based on the results obtained on the simulations. The simulation results indicate quasi-homogeneous fluence (less than 1%) in the central chamber. pt_BR
dc.format.extent 4 f. pt_BR
dc.language.iso Inglês pt_BR
dc.subject.classification Metrologia científica e aplicada pt_BR
dc.subject.classification Calibração pt_BR
dc.subject.classification Metrologia e instrumentação em radiações ionizantes pt_BR
dc.title New thermal neutron calibration channel at LNMRI/IRD pt_BR
dc.type Artigo pt_BR
dc.rights.license É permitida a reprodução deste texto e os dados nele contidos, desde que citada a fonte. Reprodução para fins comerciais são proibidas. pt_BR
bom.learningResourceType Artigo científico pt_BR
dc.mediator Instituto Nacional de Metrologia Qualidade e Tecnologia (INMETRO) pt_BR
dc.mediator Sociedade Brasileira de Metrologia (SBM) pt_BR
dc.mediator Universidade Federal do Rio de Janeiro (UFRJ) pt_BR
dc.rights.type Termo de cessão SBM pt_BR
dc.subject.decs Metrologia pt_BR
dc.subject.decs Metrologia científica e aplicada pt_BR
dc.subject.decs Medição pt_BR
dc.subject.decs Calibração pt_BR
dc.subject.keyword Metrologia das radiações ionizantes pt_BR
dc.subject.keyword Metrologia de nêutrons pt_BR
dc.subject.keyword Americium-241/Beryllium pt_BR
dc.subject.keyword Americium-241/Berílio pt_BR
dc.subject.keyword Monte Carlo method pt_BR
dc.subject.keyword Método de Monte Carlo pt_BR
dc.subject.keyword Instituto de Radioproteção e Dosimetria (IRD) pt_BR
dc.subject.keyword Fundação Técnico Educacional Souza Marques (FTESM) pt_BR
dc.location.country Brasil pt_BR


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