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Title: Single crystal to polycrystal neutron transmission simulation

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5002102· OSTI ID:1423074
 [1];  [2];  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physcis; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
+ Show Author Affiliations

A collection of routines for calculation of the total cross section that determines the attenuation of neutrons by crystalline solids is presented. The total cross section is calculated semi-empirically as a function of crystal structure, neutron energy, temperature, and crystal orientation. The semi-empirical formula includes the contribution of parasitic Bragg scattering to the total cross section using both the crystal’s mosaic spread value and its orientation with respect to the neutron beam direction as parameters. These routines allow users to enter a distribution of crystal orientations for calculation of total cross sections of user defined powder or pseudo powder distributions, which enables simulation of non-uniformities such as texture and strain. In conclusion, the spectra for neutron transmission simulations in the neutron thermal energy range (2 meV–100 meV) are presented for single crystal and polycrystal samples and compared to measurements.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1423074
Journal Information:
Review of Scientific Instruments, Vol. 89, Issue 2; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (1)

Distinct Recrystallization Pathways in a Cold-Rolled Al-2%Mg Alloy Evidenced by In-Situ Neutron Diffraction journal September 2018

Figures / Tables (16)

FIG. 1(p. 2)figure FIG. 1
FIG. 2(p. 3)figure FIG. 2
FIG. 3(p. 4)figure FIG. 3
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 7)figure FIG. 5
TABLE I(p. 7)table TABLE I
TABLE II(p. 7)table TABLE II
FIG. 6(p. 8)figure FIG. 6
FIG. 7(p. 8)figure FIG. 7
TABLE III(p. 8)table TABLE III
FIG. 8(p. 9)figure FIG. 8
FIG. 9(p. 9)figure FIG. 9
FIG. 10(p. 10)figure FIG. 10
FIG. 11(p. 11)figure FIG. 11
FIG. 12(p. 11)figure FIG. 12
FIG. 13(p. 12)figure FIG. 13

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36 MATERIALS SCIENCE
Polycrystals
Particle beams
Crystal orientation
Crystal optics
Neutron physics