Determination of the Scattered Radiation at the Neutron Calibration Laboratory of IPEN using the Shadow Cone Method
DOI:
https://doi.org/10.15392/bjrs.v7i2B.386Keywords:
Neutron, Scattered radiation, Shadow Cone MethodAbstract
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.- Views: 140
- PDF Downloads: 149
Downloads
References
CNEN, COMISSÃO NACIONAL DE ENERGIA NUCLEAR, Radioprotection Services, Standard NE 3.02, Rio de Janeiro, 1988. (In Portuguese).
ISO, INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. Reference Neu-tron Radiations. Characteristics and Methods of Production, ISO 8529, Part 2, 2000.
AMERSHAM. Amersham Products Catalog. UK, 1986.
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).
BRAMBLETT, R. L., EWING, R. I., BONNER, T. W . A new type of neutron spectrometer. Nuclear Instruments and Methods, v. 9, pp. 1-12, 1960.
LEMOS Jr, R. M., Neutron spectra unfolding using Monte Carlo method and artificial neural networks. PhD. Thesis. Instituto de Radioproteção e Dosimetria (2009). (In Portuguese).
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.
Published
How to Cite
Issue
Section
License
Copyright (c) 2019 Brazilian Journal of Radiation Sciences
This work is licensed under a Creative Commons Attribution 4.0 International License.
Licensing: The BJRS articles are licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
