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Integral Benchmark Experiments on a Large Copper Block Using the GELINA Accelerator to Validate natCu Neutron Cross Sections from Different Neutron Cross-Sectional Databases

TitoloIntegral Benchmark Experiments on a Large Copper Block Using the GELINA Accelerator to Validate natCu Neutron Cross Sections from Different Neutron Cross-Sectional Databases
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2019
AutoriPillon, M., Angelone Massimo, Moro F., Kim D.H.D., Nyman M., and Plompen A.J.M.
RivistaIEEE Transactions on Plasma Science
Volume47
Paginazione2943-2949
ISSN00933813
Parole chiaveBenchmark experiments, Chemical activation, Copper, Database systems, Electron linear accelerator, Fluxes, Integral experiments, Libraries, Monte Carlo methods, Neutron cross sections, Neutron energy range, Neutron flux, neutron scattering, Neutron shielding, Neutron sources, Neutron spectrometers, Neutrons, Nuclear data library, Radiation detectors, Radiation shielding, Sources of uncertainty
Abstract

A neutronics integral benchmark experiment on a pure copper block, aimed at testing and validating recent copper nuclear data libraries, has been performed at Geel Electron LINear Accelerator Facility (GELINA). GELINA is a powerful photoneutron source using a 75-μA, 110-MeV electron beam impinging on a depleted U rotating target, producing a white neutron spectrum ranging from the epithermal region up to about 20 MeV with a mean energy of about 1.4 MeV and intensity up to 3.2 × 1013n/s. A large natCu block (dimensions 60 × 60 × 60 cm3) has been positioned at 100 cm from the target. Thin activation foils were used as neutron flux probes and located inside the block in six positions at different depths with respect to the main neutron propagation direction. Materials whose activation cross section are sensitive to different neutron energy ranges were used, and the measured fluxes were compared with calculations performed using the MCNP6 neutron transport code coupled to different neutron cross-sectional databases (FENDL3.1, JEFF33T2, and ENDF 7.1). The MCNP6 calculation also used the neutron spectrum produced by the GELINA accelerator. This is the first time that a neutronics integral experiment on copper is performed using such a white neutron spectrum and the results of our comparison could be used to validate the neutron copper cross sections in the neutron energy range covered by GELINA. The C/E results, taking into account the sources of uncertainties, are satisfactory: no large differences are observed among the result obtained using the three cross-sectional databases; however, the JEFF-3.3 seems, slightly, better predict the results. © 1973-2012 IEEE.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85067096033&doi=10.1109%2fTPS.2019.2911706&partnerID=40&md5=a4c508df830b5725ec170c676353c621
DOI10.1109/TPS.2019.2911706
Citation KeyPillon20192943