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.
| Original language | English |
|---|---|
| Article number | 163226 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 953 |
| DOIs | |
| State | Published - Feb 11 2020 |
Funding
The authors would like to acknowledge Luke Daemen for assistance in preparing nanodiamond samples as well as William Heller for assistance in executing the nanodiamond measurement and performing the data reduction process. This material is based upon work supported by the U.S. Department of Energy, Office of Science, United States, Office of Basic Energy Sciences, United States under contract number DE-AC05-00OR22725. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This work benefited from the use of the SasView application, originally developed under National Science Foundation award DMR-0520547. SasView contains code developed with funding from the European Union's Horizon 2020 research and innovation programme under the SINE2020 project, grant agreement No 654000. The authors would like to acknowledge Luke Daemen for assistance in preparing nanodiamond samples as well as William Heller for assistance in executing the nanodiamond measurement and performing the data reduction process. This material is based upon work supported by the U.S. Department of Energy , Office of Science, United States , Office of Basic Energy Sciences, United States under contract number DE-AC05-00OR22725 . This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. This work benefited from the use of the SasView application, originally developed under National Science Foundation award DMR-0520547. SasView contains code developed with funding from the European Union’s Horizon 2020 research and innovation programme under the SINE2020 project, grant agreement No 654000.
Keywords
- MCNPX
- Monte Carlo
- Nanodiamond
- Neutron cross section
- Small angle neutron scattering