Second Consortium Online Meeting
February 23, 2021
Meeting agenda
10:00 - 10:10 Opening remarks
10:10 - 10:40 Talk by Dr. W. Błachucki
Department of Applied Spectroscopy Institute of Nuclear Physics, Polish Academy of Sciences -
current status and new investment
Wojciech Błachucki, Joanna Czapla-Masztafiak, Rafał Fanselow, Wiktoria Stańczyk, Anna Wach, Wojciech Maria Kwiatek, Jakub Szlachetko
Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342 Kraków, Poland
Abstract
The X-ray spectroscopy setup developed at the Institute of Nuclear Physics of the Polish Academy of Sciences is operating all the time. It is used in different projects such as PhD programs, feasibility studies and others. For example recently X-ray emission spectroscopy (XES) measurements were done on ZnO nanoparticles dissolved in water and circulated in the form of jet. X-ray absorption spectroscopy (XAS) studies were done on different complexes, NiO films, Co soots, Cu-based metal-organic framework (MOF) compounds, Cu nanoparticles and other Cu complexes.
Recently the Si(310) crystal has caught our attention due to its particular property: the crystal diffracts uniquely in the order n=2 within the energy range covering the K-shell binding energies of many transition metals. It enabled us to extend the lower discrimination threshold in the detector’s readings to much lower values thus allowing detection of more photon counts of interests. Figure 1 shows the average registered spectral intensity measured with the thus enhanced count rate for three different energies corresponding to K-shell binding energies of Co, Ni and Cu.
Fig. 1. Average spectral intensity registered for three energies: 7709 eV, 8333 eV and 8979 eV (K-shell binding energies of Co, Ni and Cu). The average was done on about 120-180 eV energy range centered at the three abovementioned energies. Spectral intensity was measured with Si(620) diffraction, at the X-ray tube voltage and current of 30 kV and 0.9 mA.
By the end of 2021 much space in our experimental hall will be freed as part of old apparatus is going to be removed. We plan to set up a new X-ray spectroscopy station equipped with high power X-ray source. We have started looking for available sources aiming at highest intensity and smallest X-ray spot size (see, e. g., Ref. [1]). The new source will serve in micro x-ray fluorescence (μXRF) and high resolution XAS and XES studies. We are going to submit relevant application by July 2021.
10:40 - 11:00 Questions
11:00 - 11:10 Update on planned activities around the ELI X-ray spectroscopy end station by Dr. A. Zymaková
11:10 - 11:30 Discussion
