Neutron activation and prompt gamma intensity in Ar/CO$_{2}$-filled neutron detectors at the European Spallation Source

2; (2) European Spallation Source ESS ERIC; 3); (3) Budapest University of Technology; 4); (4) Mid-Sweden University; Budapest; Centre for Energy Research; Economics; E. Dian (1

arxiv: 1701.08117 · v2 · pith:NE2FEJ4Hnew · submitted 2017-01-27 · ⚛️ physics.ins-det

Neutron activation and prompt gamma intensity in Ar/CO₂-filled neutron detectors at the European Spallation Source

E. Dian (1 , 2 , 3) , K. Kanaki (2) , R. J. Hall-Wilton (2 , 4) , P. Zagyvai (1 , Sz. Czifrus (3) ((1) Hungarian Academy of Sciences

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Centre for Energy Research Budapest Hungary (2) European Spallation Source ESS ERIC Lund Sweden (3) Budapest University of Technology Economics Institute of Nuclear Techniques (4) Mid-Sweden University Sundsvall Sweden)

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keywords neutronactivationgammacalculationsdetectoreffectintensityprompt

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Monte Carlo simulations using MCNP6.1 were performed to study the effect of neutron activation in Ar/CO$_{2}$ neutron detector counting gas. A general MCNP model was built and validated with simple analytical calculations. Simulations and calculations agree that only the $^{40}$Ar activation can have a considerable effect. It was shown that neither the prompt gamma intensity from the $^{40}$Ar neutron capture nor the produced $^{41}$Ar activity have an impact in terms of gamma dose rate around the detector and background level.

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Neutron activation and prompt gamma intensity in Ar/CO₂-filled neutron detectors at the European Spallation Source

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