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

Autor:	Adolfo Esposito, Roberto Bedogni, Mario Pillon, Maurizio Angelone, Antonio Domínguez Delgado, I. Palermo, J.M. Gómez-Ros
Rok vydání:	2011
Předmět:	Bonner sphere Radiation Materials science Spectrometer Physics::Instrumentation and Detectors Radiochemistry chemistry.chemical_element Neutron radiation Nuclear physics Neutron generator chemistry Neutron flux Neutron cross section Dysprosium Neutron Nuclear Experiment Instrumentation
Zdroj:	Radiation Measurements. 46:1712-1715
ISSN:	1350-4487
DOI:	10.1016/j.radmeas.2011.06.037
Popis:	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%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2770649626025d37e67f4ceda6ecf573 https://doi.org/10.1016/j.radmeas.2011.06.037 Zobrazit plný text záznamu Full Text from ScienceDirect