EPJ Web Conf.
Volume 193, 20186th Workshop on Nuclear Fission and Spectroscopy of Neutron-Rich Nuclei (FISSION 2017)
|Number of page(s)||6|
|Section||Prompt and Delayed Gamma and Neutron Emission in Fission|
|Published online||14 November 2018|
First Results on 238U(n,f) Prompt Fission Neutron Spectra from 1 to 200 MeV incident neutron energy
CEA, DAM, DIF, F-91297 Arpajon, France
2 LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen, France
3 P-27, Los Alamos National Laboratory, Los Alamos, NM - 87544, USA
* e-mail: firstname.lastname@example.org
Published online: 14 November 2018
A new 238U(n,f) prompt fission neutron spectra (PFNS) measurement has been recently performed at the WNR facility of the Los Alamos National Laboratory. The measurement allows one to explore the dependence of the prompt fission neutron energy spectra on the incident neutron energy. The experimental setup couples the Chi-Nu scintillator array to a newly developed fission chamber, characterized by an improved alphafission discrimination and time resolution, a reduced amount of matter in the neutron beam and a higher actinide mass. The dedicated setup and the high statistics collected allow us to obtain a good precision on the measured fission neutron energy, as well as to explore the low energy region, down to 650keV, and the high energy region, above 5 MeV, of the emitted neutron spectrum. These are indeed the regions where discrepancies in the evaluated PFNS data are found. We present here the first preliminary results of the experiment.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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