Measurements of the Prompt Fission Neutron Spectrum at LANSCE: The Chi-Nu Experiment

Kelly, Keegan John; Devlin, Matthew James; Gomez, Jaime A.; O'Donnell, John M.; Taddeucci, Terry Nicholas; Haight, Robert Cameron; Lee, Hye Young; Mosby, Shea Morgan; Fotiadis, Nikolaos; Neudecker, Denise; Talou, Patrick; Rising, Michael Evan; White, Morgan Curtis; Solomon, Clell Jeffrey Jr.; Wu, Ching-Yen; Bucher, Brian Michael; Buckner, Matthew Quinn; Henderson, Roger Alan

doi:10.1051/epjconf/201819303003

Measurements of the Prompt Fission Neutron Spectrum at LANSCE: The Chi-Nu Experiment

Journal Article · Wed Nov 14 00:00:00 EST 2018 · EPJ Web of Conferences (Online)

DOI:https://doi.org/10.1051/epjconf/201819303003· OSTI ID:1485387

^[1]; ^[1]; ^[1]; O'Donnell, John M. ^[1]; Taddeucci, Terry Nicholas ^[1]; Haight, Robert Cameron ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; ^[1]; Solomon, Clell Jeffrey Jr. ^[1]; Wu, Ching-Yen ^[2]; Bucher, Brian Michael ^[2]; Buckner, Matthew Quinn ^[2]; Henderson, Roger Alan ^[2]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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.

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1485387

Alternate ID(s):: OSTI ID: 22771965

Report Number(s):: LA-UR--17-24604

Journal Information:: EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 193; ISSN 2100-014X

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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