Comparison of MCNP thermal scattering laws to inelastic neutron scattering data

Lavelle, C. M.; Leung, K. K.H.; Ito, T. M.

doi:10.1016/j.nima.2021.166255

Comparison of MCNP thermal scattering laws to inelastic neutron scattering data

Journal Article · Wed Dec 29 00:00:00 EST 2021 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2021.166255· OSTI ID:1839351

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The Johns Hopkins Applied Physics Lab., Laurel, MD (United States)
Montclair State Univ., Montclair, NJ (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Neutron transport computations employ thermal scattering laws (TSLs) to account for the influence of material structure and collective excitations at low energy (≲ 10 eV). Recent work has been undertaken to improve TSL accuracy and expand the number of available materials in the Evaluated Nuclear Data File (ENDF). However, comparison of TSL to measured data is often sparse. In this work, we present a method to evaluate TSL accuracy in the Monte Carlo N-Particle (MCNP) code by simulating inelastic neutron scattering (INS) measurement and comparing to data. The method is briefly described with example application to the recently released ENDF-VIII TSL library for polyethylene as well as a cryogenic PE TSL we are separately developing.

Research Organization:: Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory; Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Nuclear Physics (NP)

Grant/Contract Number:: 89233218CNA000001; AC05-00OR22725; AC52-06NA25396; FG02-97ER41033

OSTI ID:: 1839351

Alternate ID(s):: OSTI ID: 1907688

Report Number(s):: LA-UR--21-21127

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Vol. 1027; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Comparison of MCNP thermal scattering laws to inelastic neutron scattering data

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References (12)

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