Calibration Of The Short Irradiation Facility For k0 - NAA Implementation At The IEA-R1 Reactor

João Pedro Oliveira Flores; Paulo Sérgio Cardoso Silva; Mauro Silva Dias; Marina Fallone Koskinas; Denise Simões Moreira; Ione Makiko Yamazaki

doi:10.15392/bjrs.v9i1A.1570

Calibration Of The Short Irradiation Facility For k0 - NAA Implementation At The IEA-R1 Reactor

Authors

João Pedro Oliveira Flores Universidade de São Paulo
Paulo Sérgio Cardoso Silva Universidade de São Paulo
Mauro Silva Dias Universidade de São Paulo
Marina Fallone Koskinas Universidade de São Paulo
Denise Simões Moreira Universidade de São Paulo
Ione Makiko Yamazaki Universidade de São Paulo

DOI:

https://doi.org/10.15392/bjrs.v9i1A.1570

Keywords:

k0 method

Abstract

The short irradiation facility of the IEA-R1 nuclear research reactor at IPEN, São Paulo, Brazil, has been used for short irradiation of samples for the purpose of determining the concentration of elements of these samples through the use of the instrumental neutron activation analysis technique. With the aim of implementing the k0-NAA method at the Neutron Activation Analysis Laboratory (LAN), the reactor parameters a and f were obtained using the bare triple method. In this method, a set of three neutron flux monitors were irradiated without Cd-cover. The efficiency curve of the gamma-ray spectrometer used was determined by measuring calibrated radioactive sources at the commonly used counting geometries. The results for the parameters a and f were respectively 0.0384±0.0016 and 35.67±0.26. This value of f shows that the neutrons in the irradiation position are well thermalized.The variation of these parameters was studied with time and the reproducibility was verified.

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Author Biography

João Pedro Oliveira Flores, Universidade de São Paulo

Física Nuclear/Tecnologia Nuclear

References

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Published

2021-04-30

Issue

Vol. 9 No. 1A (2021)

Section

The Meeting on Nuclear Applications (ENAN) 2019

License

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How to Cite

Calibration Of The Short Irradiation Facility For k0 - NAA Implementation At The IEA-R1 Reactor. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 9, n. 1A, 2021. DOI: 10.15392/bjrs.v9i1A.1570. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/1570. Acesso em: 22 dec. 2024.