The Thermal Scattering Law Project

Harnessing modern methods for material modeling and high-fidelity thermal scattering evaluations, the Scattering Law Project provides access to nuclear thermal scattering data from fundamental inputs to benchmark testing on key reactor and nuclear criticality materials to inspire and support the next generation of nuclear applications.

Polyethylene (CH2)

Polyethylene (CH2) is a polymer material used in many criticality benchmarks as a moderating material. CH2 was modelled using classical molecular dynamics (MD) using the LAMMPS code. From the generated velocity autocorrelation function (VACF), the corresponding density of states (DOS) was derived and used in FLASSH 1.0 to calculate the thermal scattering law (TSL). Incoherent elastic contributions are included for the hydrogen component.

Publications

Development of a Thermal Neutron Scattering Law for Polyethylene using Molecular Dynamics Simulations
 

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