skip to main content

SciTech ConnectSciTech Connect

Title: Precise calculations in simulations of the interaction of low energy neutrons with nano-dispersed media

We discuss properties of the interaction of slow neutrons with nano-dispersed media and their application for neutron reflectors. In order to increase the accuracy of model simulation of the interaction of neutrons with nanopowders, we perform precise quantum mechanical calculation of potential scattering of neutrons on single nanoparticles using the method of phase functions. We compare results of precise calculations with those performed within first Born approximation for nanodiamonds with the radius of 2–5 nm and for neutron energies 3 × 10{sup -7}–10{sup -3} eV. Born approximation overestimates the probability of scattering to large angles, while the accuracy of evaluation of integral characteristics (cross sections, albedo) is acceptable. Using Monte-Carlo method, we calculate albedo of neutrons from different layers of piled up diamond nanopowder.
Authors:
 [1] ;  [2] ;  [3]
  1. Research Institute of Materials Technology (Russian Federation)
  2. Moscow State Industrial University (Russian Federation)
  3. Institut Max von Laue—Paul Langevin (France)
Publication Date:
OSTI Identifier:
22471920
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 61; Journal Issue: 1; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALBEDO; BORN APPROXIMATION; COMPARATIVE EVALUATIONS; CROSS SECTIONS; DIAMONDS; EV RANGE; LAYERS; MONTE CARLO METHOD; NANOPARTICLES; NANOSTRUCTURES; NEUTRON REFLECTORS; POTENTIAL SCATTERING; POWDERS; QUANTUM MECHANICS; SLOW NEUTRONS