Investigations with neutrons settle scientific dispute about the structure of fluorine.
In toothpaste, Teflon, LED and medications, it shows its sunny side – but elemental fluorine is extremely aggressive and highly toxic. Attempts to determine the crystal structure of solid fluorine using X-rays ended with explosions 50 years ago. A research team has now clarified the actual structure of the fluorine using neutrons from the Heinz Maier-Leibnitz Research Neutron Source (FRM II).

One of the broad research areas at PSI covers the topic of energy. Part of that, in turn, is the research for nuclear energy and safety. And one of the research groups based here is engaged with nuclear fuels. Johannes Bertsch is the head of this group and investigates the importance of so-called cladding tubes and their protective layers.

Scientists from Jülich together with colleagues from Japan have discovered how fuel cell membranes can be improved without the use of rare and expensive precious metals such as platinum. The anion-exchange membranes studied are a key component of certain polymer electrolyte fuel cells and serve to transfer charged particles (anions) while at the same time retaining gases such as oxygen or hydrogen.