Application of the Reduced-Fitting Method to determine neutron scattering
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2021
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Radiation Physics and Chemistry
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As the number of techniques using neutron radiation has grown, the number of neutrons detectors has increased
along with need for their calibration. In Brazil this substantial demand for neutron detector calibration falls on a
single laboratory located in Rio de Janeiro. One of the major problems in the calibration of neutron detectors is
neutron scattering, which varies depending on the size and configuration of the laboratory. This is due to the
neutrons that interact with the experimental setup and the surrounding, walls, floor and ceiling. This scatter
influences the reading of the instrument to be calibrated and causes systematic errors in the calibration of
neutron detectors. ISO 8529-2 recommends the following methods to correct these effects: The Semi-Empirical
Method (SEM), the Reduced-Fitting Method (RFM), the Shadow-Cone Method (SCM) and the Generalized Fit
Method (GFM). In this study, the neutron scattering characterization was performed in the Neutron Calibration
Laboratory (LCN) of IPEN/CNEN, using the RFM method. The neutron source used was 241AmBe, which was
positioned in the center of the calibration room. Neutron spectra were obtained using a scintillation detector
based on 6Lil(Eu) in combination with a Bonner sphere spectrometer (BSS) at source-detector distances from
30 cm to 258 cm.
Como referenciar
ALVARENGA, TALLYSON S.; POLO, IVON O.; PEREIRA, WALSAN W.; MAYHUGH, MICHAEL R.; CALDAS, LINDA V.E. Application of the Reduced-Fitting Method to determine neutron scattering. Radiation Physics and Chemistry, v. 179, p. 1-8, 2021. DOI: 10.1016/j.radphyschem.2020.109207. Disponível em: http://200.136.52.105/handle/123456789/31588. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.