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Neutron thermal cross sections of 3D-printing organic polymers using the Average Functional Group Approximation

Authors :
Romanelli Giovanni
Simoni Margherita
Preziosi Enrico
Marquez Damian Jose Ignacio
Andreani Carla
Senesi Roberto
Source :
EPJ Web of Conferences, Vol 284, p 17010 (2023)
Publication Year :
2023
Publisher :
EDP Sciences, 2023.

Abstract

We provide a worked example on how to obtain the total neutron scattering cross section of organic polymers at thermal neutron energies by means of the Average Functional Group Approximation. Within this framework, a polymer is rationalised as composed of hydrogen atoms belonging to specific functional groups,therefore taking into account the material-specific incoherent inelastic scattering contributions to the thermal cross section. Such simplified model allows the calculation of thermal neutron cross sections for a broad variety of materials of interest in neutron applications, e.g., sample containers and shielding components. We discuss in detail the case of ABS, often available as a 3D-printing material, whereby three polymers (acrylonitrile, butadiene, and styrene) can be combined in several mass percentages depending on the final application. Results are obtained using the NCrystal module already featuring the Average Functional Group Approximation.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
2100014X
Volume :
284
Database :
Directory of Open Access Journals
Journal :
EPJ Web of Conferences
Publication Type :
Academic Journal
Accession number :
edsdoj.813bc478626e4b2ca7c6da9b507b4836
Document Type :
article
Full Text :
https://doi.org/10.1051/epjconf/202328417010