EPJ Web of Conf.
Volume 284, 202315th International Conference on Nuclear Data for Science and Technology (ND2022)
|Number of page(s)||5|
|Section||Thermal Neutron Scattering|
|Published online||26 May 2023|
Experimental validation of thermal scattering evaluations
1 Gaerttner LINAC Center, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
2 Naval Nuclear Laboratory, P.O. Box 1072, Schenectady, New York 12301, USA
3 Nuclear Energy and Fuel Cycle Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
* e-mail: firstname.lastname@example.org
Published online: 26 May 2023
In order to test the performance of new neutron thermal scattering law (TSL) evaluations it is desirable to have experimental data that is highly sensitive to the TSL and provides high fidelity information on the energy dependent performance of TSL evaluations. Three relevant experiments are discussed including: accurate thermal total cross section measurements, thermal neutron die-away experiments, and neutron leakage experiments. The experimental setups and results are reviewed and examples provided for some moderators including polyethylene, Plexiglas, and YHx. For the experiments preformed thus far, there is generally good agreement between the measured total cross section and simulations using current TSL evaluations, however in certain energy ranges differences were observed. Similarly neutron die-away and leakage measurements for samples at room temperature are in good agreement with data computed from TSLs, however leakage measurements for polyethylene at 29K show discrepancies with TSL evaluations.
© The Authors, published by EDP Sciences, 2023
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