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Title: The small-angle neutron scattering extension in MCNPX and the SANS cross section for nanodiamonds

Abstract

Detonation nanodiamonds provide an intriguing prospect for the development of a very cold neutron (VCN) source or as a high albedo material for VCN reflection helping to control leakage of cold and very cold neutrons in a moderator. The investigation of source and reflector designs necessitates the development of new simulation tools for existing Monte Carlo codes that include small angle neutron scattering (SANS). The SANS extension in MCNPX 2.7 provides an analytical model of hard-sphere scattering with variable scattering particle sizes, size distributions, and packing fractions in order to supplement currently existing scattering kernels as well as the capability to read an experimentally determined small angle neutron scattering profile from a data file. The SANS extension is discussed and compared to nanodiamond SANS measurements.

Authors:
ORCiD logo [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1607149
Alternate Identifier(s):
OSTI ID: 1577932
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 953; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Nanodiamond; Monte Carlo; MCNPX; Neutron cross section; Small angle neutron scattering

Citation Formats

Grammer, Kyle, and Gallmeier, Franz X. The small-angle neutron scattering extension in MCNPX and the SANS cross section for nanodiamonds. United States: N. p., 2019. Web. https://doi.org/10.1016/j.nima.2019.163226.
Grammer, Kyle, & Gallmeier, Franz X. The small-angle neutron scattering extension in MCNPX and the SANS cross section for nanodiamonds. United States. https://doi.org/10.1016/j.nima.2019.163226
Grammer, Kyle, and Gallmeier, Franz X. Fri . "The small-angle neutron scattering extension in MCNPX and the SANS cross section for nanodiamonds". United States. https://doi.org/10.1016/j.nima.2019.163226. https://www.osti.gov/servlets/purl/1607149.
@article{osti_1607149,
title = {The small-angle neutron scattering extension in MCNPX and the SANS cross section for nanodiamonds},
author = {Grammer, Kyle and Gallmeier, Franz X.},
abstractNote = {Detonation nanodiamonds provide an intriguing prospect for the development of a very cold neutron (VCN) source or as a high albedo material for VCN reflection helping to control leakage of cold and very cold neutrons in a moderator. The investigation of source and reflector designs necessitates the development of new simulation tools for existing Monte Carlo codes that include small angle neutron scattering (SANS). The SANS extension in MCNPX 2.7 provides an analytical model of hard-sphere scattering with variable scattering particle sizes, size distributions, and packing fractions in order to supplement currently existing scattering kernels as well as the capability to read an experimentally determined small angle neutron scattering profile from a data file. The SANS extension is discussed and compared to nanodiamond SANS measurements.},
doi = {10.1016/j.nima.2019.163226},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 953,
place = {United States},
year = {2019},
month = {12}
}