Measurements of the Prompt Fission Neutron Spectrum at LANSCE: The Chi-Nu Experiment
Los Alamos National Laboratory, Los Alamos, NM, 87544, USA
2 Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
* e-mail: email@example.com
Published online: 14 November 2018
The goal of the Chi-Nu experiment at the Los Alamos Neutron Science Center is to measure the prompt fission neutron spectra from major actinides using a double time-of-flight method with a pulsed, white incoming neutron source. Fission events are detected with a parallel-plate avalanche counter and outgoing neutrons are detected with either a 6Li-glass or liquid scintillator detector array for low- or high-energy neutrons, respectively. A detector response matrix for the interaction of neutrons with the experimental environment for neutrons measured with the Chi-Nu 6Li-glass detector array has been calculated to obtain a full understanding of the measured Chi-Nu data and also to allow for nearly instantaneous production of simulated Chi-Nu data spectra. Prompt fission neutron spectra corresponding to 19 incoming neutron energy ranges from 0.7-20 MeV have been extracted using the ratio-of-ratios method with Chi-Nu 6Li-glass data on the neutron-induced fission of 235U.
© The Authors, published by EDP Sciences, 2018
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