Chi-Nu experiment ends, bolsters nuclear security and energy reactors

📆 9/26/2023 6:39 PM
📰 physorg_com

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The results of the Chi-Nu physics experiment at Los Alamos National Laboratory have contributed essential, never-before-observed data for enhancing nuclear security applications, understanding criticality safety and designing fast-neutron energy reactors. The Chi-Nu project, a years-long experiment measuring the energy spectrum of neutrons emitted from neutron-induced fission, recently concluded the most detailed and extensive uncertainty analysis of the three major actinide elements—uranium-238, uranium-235 and plutonium-239.

. The probability of subsequent reactions in the chain depends on the energy of the fission neutrons.

Neutrons emitted from the fission event are then measured in either the liquid scintillator or lithium-glass detector arrays, depending on the experiment's energy range, with both detectors recording flashes of light induced within the detectors by the neutrons.

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