Speaker
Description
The European Spallation Source Spallation Physics Group (ESS SPG) supports the construction and operation of the facility through research and development in radiation transport, shielding design, material science, and radiation physics, with a particular focus on low‑energy neutron interaction modelling. In collaboration with the ESS Data Management and Scientific Computing centre and international partners, ESS SPG develops theoretical models, software tools, and experimental validation methods for materials relevant to neutron production, including moderators, reflectors, filters, and structural components. Recent work includes internationally adopted updates to neutron scattering models for beryllium, light water, liquid hydrogen and deuterium, as well as the development of flexible modelling tools for crystalline materials via NCrystal, resulting in significant contributions to the JEFF‑4 and ENDF/B nuclear data libraries. These models support improved neutron instrument performance, wavelength‑dependent transmission analysis, and the interpretation of experimental data.
In this work we summarize the latest work on the topic, with references to the specific developments and applications.