Design and validation of a photon insensitive multidetector neutron spectrometer based on dysprosium activation foils

J.M. Gómez-Ros, R. Bedogni, I. Palermo, A. Esposito, A. Delgado, M. Angelone, M. Pillon

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Abstract

This communication describes a photon insensitive passive neutron spectrometer consisting of Dysprosium (Dy) activation foils located along three perpendicular axes within a single moderating polyethylene sphere. The Monte Carlo code MCNPX 2.6 was used to optimize the spatial arrangement of the detectors and to derive the spectrometer response matrix. Nearly isotropic response in terms of neutron fluence for energies up to 20 MeV was obtained by combining the readings of the detectors located at the same radius value. The spectrometer was calibrated using a previously characterized 14 MeV neutron beam produced in the ENEA Frascati Neutron Generator (FNG). The overall uncertainty of the spectrometer response matrix at 14 MeV, assessed on the basis of this experiment, was ±3%. © 2011 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)1712 - 1715
Number of pages4
JournalRadiation Measurements
Volume46
Issue number12
DOIs
Publication statusPublished - Dec 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Radiation
  • Instrumentation

Cite this

Gómez-Ros, J. M., Bedogni, R., Palermo, I., Esposito, A., Delgado, A., Angelone, M., & Pillon, M. (2011). Design and validation of a photon insensitive multidetector neutron spectrometer based on dysprosium activation foils. Radiation Measurements, 46(12), 1712 - 1715. https://doi.org/10.1016/j.radmeas.2011.06.037