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A new sample environment for cryogenic nuclear resonance scattering experiments on single crystals and microsamples at P01, PETRA III |
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| Authors: | Sergej Rackwitz Isabelle Faus Markus Schmitz Harald Kelm Hans-Jörg Krüger K. Kristoffer Andersson Hans-Petter Hersleth Klaus Achterhold Kai Schlage Hans-Christian Wille Volker Schünemann Juliusz A. Wolny |
| Affiliation: | 1. Department of Physics, University of Kaiserslautern, Erwin-Schr?dinger-Str. 46, 67663, Kaiserslautern, Germany 2. Department of Chemistry, University of Kaiserslautern, Erwin-Schr?dinger-Str. 54, 67663, Kaiserslautern, Germany 3. Department of Molecular Biosciences, University of Oslo, N-0316, Oslo, Norway 4. Physics-Department E17, Technische Universit?t München, D-85748, Garching, Germany 5. PETRA III, P01, DESY, Notkestra?e 85, 22607, Hamburg, Germany |
| Abstract: | In order to carry out orientation dependent nuclear resonance scattering (NRS) experiments on small single crystals of e.g. iron proteins and/or chemical complexes but also on surfaces and other micrometer-sized samples a 2-circle goniometer including sample positioning optics has been installed at beamline P01, PETRA III, DESY, Hamburg. This sample environment is now available for all users of this beamline. Sample cooling is performed with a cryogenic gas stream which allows NRS measurements in the temperature range from 80 up to 400 K. In a first test this new sample environment has been used in order to investigate the orientation dependence of the nuclear inelastic scattering (NIS) signature of (i) a dinuclear iron(II) spin crossover (SCO) system and (ii) a hydrogen peroxide treated metmyoglobin single crystal. |
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