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. 2023 Apr:194:110694.
doi: 10.1016/j.apradiso.2023.110694. Epub 2023 Jan 25.

Estimation with Monte Carlo of thermal neutrons in the FANT, using 252Cf and 241Am/9Be neutron source

Lenin E Cevallos-Robalino  1 , Gonzalo García-Fernández  2 , Eduardo Gallego  2 , Hector Rene Vega-Carrillo  3 , Roberto García-Baonza  2 , Orlando Barcia-Ayala  4 , Bremnen Veliz  4
Affiliations

Estimation with Monte Carlo of thermal neutrons in the FANT, using 252Cf and 241Am/9Be neutron source

Lenin E Cevallos-Robalino et al. Appl Radiat Isot. 2023 Apr.

Abstract

The thermal neutron irradiation device (FANT), developed at the Neutron Measurements Laboratory of the Energy Engineering Department at Universidad Politécnica de Madrid, is a high-density polyethylene regular parallelepiped, with a rather uniform neutron fluence inside its irradiation chamber. It uses a Am95241/Be49 neutron source aiming to provide thermal neutron fluence rates. Neutron spectra and neutron fluences were estimated with Monte Carlo methods in the FANT irradiation chamber when a Cf98252 neutron source is used and were compared with the results obtained with the Am95241/Be49 source. Regardless of the neutron source, the largest contribution is due to thermal neutrons, producing also epithermal and fast neutrons. Per neutron emitted by the source, the use of Cf98252 produces a larger amount of neutrons.

Keywords: FANT; Monte Carlo; Neutron spectra.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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