Helmholtz Institute Freiberg for Resource Technology
RODARE Docs (Rossendorf Data Repository - Helmholtz-Zentrum Dresden-Rossendorf, HZDR)Not a member yet
1328 research outputs found
Sort by
Data publication: Ultrafast Relaxation Dynamics of Spin-Density Wave Order in BaFe2As2 under High Pressures
No full textRaw pump-probe data for two Ba-122 DAC fillings used in the paper, photos of the samples inside the DAC, Matlab script for constructing the p-T plot of the SDW orde
Raw Data: Recycling of rare earth containing waste with peptide-functionalized floating glass bubbles in a phage mimicking approach
No full textRaw data for the Publication "Recycling of rare earth containing waste with peptide-functionalized floating glass bubbles in a phage mimicking approach
Reaction cross sections 54Fe(n,γ)55Fe and 35Cl(n,γ)36Cl at keV neutron energies investigated by Accelerator Mass Spectrometry
No full textTypical neutron energies for the astrophysical s-process follow the Maxwell-Boltzmann distribution in the keV energy range. Neutron capture cross sections highly relevant for modelling the s-process can be experimentally determined by using the Time-of-Flight (ToF) method [1] or by the activation technique. If the reaction product is a long-lived radionuclide (t1/2 ~ yr -100 Myr), the cross section can be determined by activation with a quasi-stellar neutron distribution (typically kT = 25 keV) and a subsequent accelerator mass spectrometry (AMS) measurement of the reaction product [2]. Comparison of a number of such neutron capture cross sections shows a systematic bias, i.e. AMS data being lower than the ToF data [3, 4].
To investigate this discrepancy, we repeated experiments for two reactions that allow for highly precise AMS data: Maxwellian-averaged cross sections for the reactions 54Fe(n,γ)55Fe and 35Cl(n,γ)36Cl were investigated with dedicated activations at the Frankfurt Neutron Source (FRANZ) in Germany [5] and AMS measurements at two independent facilities. Analogously to previous activations, a quasi-stellar neutron spectrum of kT = 25 keV was produced via the 7Li(p,n) reaction, but at a different neutron-producing facility. Furthermore, to complement existing ToF and AMS data, an additional neutron activation of 54Fe and 35Cl at a proton energy of 2 MeV was performed, yielding data in the not-yet explored kT = 90 keV region.
The irradiated metallic Fe foil and NaCl pellet (both of natural isotopic composition) were chemically processed and converted to AMS targets (Fe2O3 and AgCl) together with non-irradiated blanks. The subsequent AMS measurements of both radionuclides, 36Cl and 55Fe, were performed at two complementary AMS facilities, the Heavy Ion Accelerator Facility (HIAF) at the Australian National University [6] and at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) in Germany [7]. AMS allows a direct measurement of the 55Fe/54Fe and 36Cl/35Cl conversion ratios that result from the irradiation. The cross section is then deduced from the isotope ratio and the neutron fluence, which is determined using Au monitor foils.
The new experiment was designed to produce highly accurate data and, owing to the two independent AMS measurements, it minimizes unrecognized sources of uncertainties in the AMS technique. The new preliminary data obtained in this work seem to confirm the previous AMS results. Consequently, the systematic discrepancy between AMS and ToF data remains unresolved.
[1] Guber, K.H., et al., Phys. Rev. C 65, 058801 (2002).
[2] Györky, Gy., et al., Eur. Phys. J. A 55, 41 (2019).
[3] Capote, R., et al., Nucl. Data Sheets 163 (2020): 191.
[4] Slavkovská, Z., et al., EPJ Web Conf. Vol. 232, p.02005, EDP Sciences, 2020.
[5] Reifarth, R., et al., Publ. Astron. Soc. Aust. 26.3 (2009): 255.
[6] Fifield, L.K., et al. Nucl. Instr. Meth. B: 268 (2010): 858.
[7] Rugel, G., et al., Nucl. Instr. and Meth. in Phys. Res. B 370 (2016) 94.for RADIAT
Data publication: Unusual dynamics of the ferroelectric phase transition in K1−xLixTaO3 crystals
No full textSHG temperature dependence and dielectric spectroscopy data on KLT measured by A. Pashki
Data publication: Data-Driven Quest for Two-Dimensional Non-van der Waals Materials
No full textThis dataset includes the primary research data for the publication "Data-Driven Quest for Two-Dimensional Non-van der Waals Materials", https://doi.org/10.1021/acs.nanolett.1c03841
Data publication: Development and Biological Evaluation of the First Highly Potent and Specific Benzamide-Based Radiotracer [¹⁸F]BA3 for Imaging of Histone Deacetylases 1 and 2 in Brain
No full textThe data publication contain: 1) Radiosynthesis data (Scheme of the synthesis module; RP-HPLC chromatograms of formulated [18F]BA3; MLC chromatograms of in vivo metabolism studies) 2) Biological data (Baseline TAC of CD-1 mice brain, biodistribution after i.v. injection of [18F]BA3) 3) Analytical data (1H, 13C, 19F NMR spectra; LC-MS chromatograms for final products
Software for Bubble identification from images with machine learning methods
No full textThis package contains the software and the trained models described in the publication "Bubble identification from images with machine learning methods". Please refer to the README.md for installation instructions and to the Prediction_demo.ipynb for usage demonstration.
Update
The Prediction_demo.ipynb includes now an example how to prepare the predictions for the tracking algorithm of "Fate of bubble clusters rising in a quiescent liquid". The tracking code can be found here.
Update
Now only tensorflow models are used, so no MXNet installation required
C++ & Python API for Scientific I/O with openPMD
No full textopenPMD is an open metadata format for open data workflows in open science. This library provides a common high-level API for openPMD writing and reading. It provides a common interface to I/O libraries and file formats such as HDF5 and ADIOS. Where supported, openPMD-api implements both serial and MPI parallel I/O capabilities.Supported by the Exascale Computing Project (17-SC-20-SC), a collaborative effort of two U.S. Department of Energy organizations (Office of Science and the National Nuclear Security Administration). Supported by the Consortium for Advanced Modeling of Particles Accelerators (CAMPA), funded by the U.S. DOE Office of Science under Contract No. DE-AC02-05CH11231. This work was partially funded by the Center of Advanced Systems Understanding (CASUS), which is financed by Germany's Federal Ministry of Education and Research (BMBF) and by the Saxon Ministry for Science, Culture and Tourism (SMWK) with tax funds on the basis of the budget approved by the Saxon State Parliament
Coupled thermo-fluid-mechanical FEM simulations for thermoelastic harvesting of low-grade waste heat
No full textCOMSOL-Multiphysics file for the FEM-Simulations of the paper. The attached version was used to generate plot data. The extracted plot data is attached as well
Data publication: Bubble Formation from Sub-millimetre Orifices
No full textThis is the data used in the thesis "Bubble Formation from Sub-millimetre Orifices"