Bochum 2018 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 49: Astroparticle Physics II and Applications

HK 49.4: Vortrag

Donnerstag, 1. März 2018, 15:15–15:30, HZO 100

Non-destructive studies using a new Neutron Depth Profiling instrument at the Heinz Maier-Leibnitz Zentrum in Garching near Munich — •Markus Trunk¹, Roman Gernhäuser², Bastian Märkisch¹, Zsolt Revay³, Lukas Werner¹, Hubert Gasteiger⁴, Morten Wetjen⁴, and Ralph Gilles³ — ¹TU München, LS Elementarteilchen bei niedrigen Energien — ²TU München, Zentrales Technologielabor — ³TU München, Heinz Maier-Leibnitz Zentrum — ⁴TU München, LS Technische Elektrochemie

Neutron Depth Profiling is a non-destructive, isotope specific, high-resolution nuclear analytical technique, which is sensitive to several light isotopes like He-3, B-10, Li-6, N-14, O-17. Upon neutron capture the investigated nuclei undergo nuclear reactions and emit charged particles. The energy loss through matter is correlated to depth information and a depth profile of elemental concentrations are obtained. We present the first material measurements at the recently established N4DP setup at the NL4b beamline, where cold neutrons are used to irradiate the samples with a flux of up to 3E10 s-1cm-2. We introduce the method, show applications in different material science branches and present results from an ex situ study of new electrode coating materials for lithium-ion batteries. Special interest here is the formation of passive solid-electrolyte-interfaces (SEI), where NDP offers the opportunity to monitor the depth dependent SEI evolution. This project is supported by BMBF No. 05K16WO1.