Determination of the Scattered Radiation at the Neutron Calibration Laboratory of IPEN using the Shadow Cone Method

Autores/as

  • Tallyson Sarmento Alvarenga INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES- IPEN
  • Bruno Mendes Freitas Universidade Federal do Rio de Janeiro image/svg+xml
  • Evaldo S Fonseca Instituto de Radioproteção e Dosimetria - IRD/CNEN - RJ
  • Walsan W Pereira Instituto de Radioproteção e Dosimetria - IRD/CNEN - RJ
  • Linda V.E Caldas INSTITUTO DE PESQUISAS ENERGÉTICAS E NUCLEARES- IPEN

DOI:

https://doi.org/10.15392/bjrs.v7i2B.386

Palabras clave:

Neutron, Scattered radiation, Shadow Cone Method

Resumen

Because of the increase in the demand for the calibration of neutron detectors, there is a need for new calibration      services. In this context, the Calibration Laboratory of Instituto de Pesquisas Energéticas e Nucleares (IPEN), São Paulo, which already offers calibration services of radiation detectors with standard X, gamma, beta and alpha beams, has recently projected a new test laboratory for neutron detectors. This work evaluated the contribution of dispersed neutron radiation in this laboratory, using the Cone Shadow Method and a Bonner Sphere Spectrometer to take the measurements at a distance of 100 cm from the neutron source. The dosimetric quantities Ambient Dose Equivalent Rate (Ḣ*(10)) and Ambient Dose Equivalent Conversion Coefficient (h*(10)) were obtained at the laboratory, allowing the calibration of detectors.

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Referencias

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ALVARENGA , T. S., Installation and basic characterization of a laboratory for testing of portable monitors with neutron radiation. MSc. Dissertation, Instituto de Pesquisas Energéticas e Nucleares, University of São Paulo (2014). (In Portuguese).

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MIRZAJANI, N.; CIOLINI, R.; CURZIO, G. Analysis of the application of the shadow cone technique for the determination of the neutron spectrum with Bonner sphere spectrometer. Nuclear Instruments and Methods in Physics Research Section A, v. 722, p. 24-28, 2013.

FREITAS, M. F.; MARTINS, M. M.; PATRÃO, C. S. K.; FONSECA, S. E.; PERREIRA, W. W.; MAURICIO, P. L. C. Scattering correction for 241Am-Be calibration of an individual Albedo neutron dosemeter. In: Proceedings of the INAC-International Nuclear Atlantic Conference, Nov 24-29, 2013, Recife-PE, Brasil.

Publicado

2019-06-25

Número

Sección

XX Meeting on Nuclear Reactor Physics and Thermal Hydraulics (XX ENFIR)

Cómo citar

Determination of the Scattered Radiation at the Neutron Calibration Laboratory of IPEN using the Shadow Cone Method. Brazilian Journal of Radiation Sciences (BJRS), Rio de Janeiro, Brazil, v. 7, n. 2B (Suppl.), 2019. DOI: 10.15392/bjrs.v7i2B.386. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/386. Acesso em: 17 jul. 2025.