Calibration of the short irradiation facility for K0 − NAA implementation at the IEA-R1 Reactor
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2019
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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The short irradiation facility of the IEA-R1 nuclear research reactor at IPEN, S~ao 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 and f were obtained using the bare triple method. In this method, a set of three neutron
ux monitors were irradiated without Cd-cover. The e ciency curve of the gamma-ray spectrometer used
were determined by measuring calibrated radioactive sources at the usually utilized counting geometries.
The results obtained for the parameters and f were respectively 0:0384 0:0016 and 35:67 0:26. The
obtained value of f shows that the neutrons in the irradiation position are well thermalized, in other
words, the value of f, means that thermal neutron
ux is 35 times higher than epithermal neutron
ux.
It means that this irradiation position is well thermalized. The variation of these parameters was studied
with time and the reproducibility was veri ed.
Como referenciar
OLIVEIRA, J.P.; SILVA, P.S.C.; SEMMLER, R. Calibration of the short irradiation facility for K0 − NAA implementation at the IEA-R1 Reactor. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 454-458. Disponível em: http://repositorio.ipen.br/handle/123456789/30367. Acesso em: 30 Dec 2025.
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.