The normalisation workflow and post-processing pipeline for Neutron Resonance Transmission Imaging at the INES beamline

Abstract Neutron Resonance Transmission Imaging (NRTI) is an energy-dependent method based on event-mode acquisition of time-of-flight radiographs over a white neutron beam. NRTI enables the identification and mapping of elements and isotopes within the bulk of a sample with enhanced contrast, providing complementary capabilities of conventional imaging methods. Its growing adoption within the user community of the ISIS Neutron and Muon Source underscores the need for a standardised and reproducible data reduction framework to ensure consistent results. A dedicated effort towards its end-user optimisation is underway at the INES beamline of the ISIS facility. This work focuses on NRTI data treatment, detailing the normalisation pipeline and post-processing steps for qualitative isotopes and elements mapping. The methodology is demonstrated through a practical example, highlighting the steps required to achieve transmission data suitable for post-processing analysis.