Publications database

Concentration polarization (CP) is determined by neutron transmission in a reverse osmosis (RO) system consisting of two cells, one with and the other without an RO membrane, to get the net neutron response for the feed solution in front and far from the membrane separately. The aqueous feed was a dilute solution of NaCl and GdCl3. [...]

Fuel-driven transient materials that can temporally adjust their mechanical properties are ubiquitous in living systems, enabling biological functions to be maintained far from equilibrium. While numerous biomimetic transiently stiffened materials have been developed, their low stiffened moduli (typically in the kPa range) severely restrict their practical use in load-bearing applications. [...]

A site-selective 27Alnuclear magnetic resonance (NMR) study is carried out on the Kondo lattice compound CePtAl4⁢Ge2, which crystallizes in a rhombohedral lattice with quasi-two-dimensional Ce layers forming a triangular lattice network. Two inequivalent Al sites, Al(1) and Al(2), are unambiguously assigned by comparing measured nuclear quadrupole parameters with electric field gradients obtained from electronic structure calculations. [...]

This study investigates the performance of a new compact (55 cm × 56 cm × 48 cm) in situ spin-exchange optical pumping 3He neutron spin filter (NSF) system developed at the China Spallation Neutron Source. The enclosed NSF cell, filled with 3He at 2.53 bar, achieved an initial 3He polarization of approximately 60%. [...]

Centrosymmetric compounds which host three-dimensional topological spin structures comprise a distinct subclass of materials in which multiple-𝐪magnetic order is stabilized by anisotropy and bond frustration in contrast to the more common path of antisymmetric exchange interactions. Here we investigate static and dynamic magnetic properties of the cubic perovskite SrFeO3—a rare example of a centrosymmetric material hosting two types of topological spin textures: skyrmionlike and hedgehog-lattice phases. [...]

The Airy wave packet is a solution to the potential-free Schrödinger equation that exhibits remarkable properties such as self-acceleration, nondiffraction, and self-healing. Although Airy beams are now routinely realized with electromagnetic waves and electrons, the implementation with neutrons has remained elusive due to small transverse coherence lengths, low fluence rates, and the absence of neutron lenses. [...]

More and more industrial customers require quality management (QM) systemimplementation and certification for their entire supply chain of the irradiation serviceat research reactors. In addition, users from the nuclear medicine and materialscience desire also such QM certificates for the isotope production or analysis.Neutron irradiation procedures aiming isotope production and the activation ofsamples for analytical purposes, including the Silicon doping, have been certificatedaccording to the ISO 9001:2015 at the research reactor FRM II since years.Additionally, the procedures for the gamma-irradiation in the spent fuel elements andthe instrumental neutron activation analysis (INAA) will get certified soon. [...]

The pink variety of beryl, morganite, is one of the most popularorangey-pink to pink gemstones. Its colour is attributedto manganese, both Mn2+ and Mn3+ (Nassau & Wood, 1968,Wood and Nassau, 1968, Schmetzer et al., 1974, Shigleyand Ford, 1984, Deer et al., 1992), which produce a seriesof spin-allowed absorption bands between 450 to 600 nm.Their exact position and quantity depends on the strengthand symmetry of the local crystal field, which, among others,also depends on the substitution mechanisms on theBe-position in the crystal lattice (Platonov et al., 1989). [...]

Artificial irradiation is one of the most important methods used to enhance the colour of gem materials. The irradiation time is much shorter, and the energy dose is often much higher, than would occur in nature, but the treatment has been impossible or very difficult to identify since both laboratory and natural irradiation processes involve the same colouration mechanisms. [...]

A high-dose gamma-irradiation facility has been developed for irradiation experiments in the spent fuel elements (SFE) at the research reactor FRM II. The irradiation is performed underwater [...]