A5103260710- Crystallography and Radiation Phenomena
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Spectroscopy and Laser Applications
- Advanced X-ray Imaging Techniques
- Digital Image Processing Techniques
- Laser Design and Applications
- Advanced Software Engineering Methodologies
- Astrophysical Phenomena and Observations
- Material Dynamics and Properties
- Block Copolymer Self-Assembly
- Advanced Image Fusion Techniques
- Logic, programming, and type systems
- Advanced Data Compression Techniques
- Atomic and Molecular Physics
- Service-Oriented Architecture and Web Services
- Molecular Spectroscopy and Structure
- Laser-Matter Interactions and Applications
- nanoparticles nucleation surface interactions
- Mass Spectrometry Techniques and Applications
- Diamond and Carbon-based Materials Research
- Medical Image Segmentation Techniques
Max Planck Institute for Nuclear Physics
2022-2025
Le Mans Université
1992-1998
Centre National de la Recherche Scientifique
1998
We used the monochromatic soft-x-ray beamline P04 at synchrotron-radiation facility PETRA III to resonantly excite strongest $2p-3d$ transitions in neon-like Ni XIX ions, $[2p^6]_{J=0} \rightarrow [(2p^5)_{1/2}\,3d_{3/2}]_{J=1}$ and [(2p^5)_{3/2}\,3d_{5/2}]_{J=1}$, respectively dubbed 3C 3D, achieving a resolving power of 15\,000 signal-to-background ratio 30. obtain their natural linewidths, with an accuracy better than 10\%, as well oscillator-strength $f(3C)/f(3D)$ = 2.51(11) from...
One of the most enduring and intensively studied problems x-ray astronomy is disagreement state-of-the art theory observations for intensity ratio two Fe XVII transitions crucial value plasma diagnostics, dubbed 3C 3D. We unravel this conundrum at PETRA III synchrotron facility by increasing resolving power 2.5 times signal-to-noise thousandfold compared with our previous work. The Lorentzian wings had hitherto been indistinguishable from background were thus not modeled, resulting in a...
We present a merged-beams study of reactions between <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>HD</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup></a:mrow></a:math> ions, stored in the Cryogenic Storage Ring (CSR), and laser-produced ground-term C atoms. The molecular ions are for up to 20 s extreme vacuum CSR, where they have time relax radiatively until reach their vibrational ground state (within 0.5 storage) rotational...
We describe a simple gas expansion ion source based on static discharge voltages and commercially available pulsed valve. The is initiated by the pulse itself between two high voltage electrodes, without need for fast switches or complex timing schemes. very reliably produces intense bursts of molecular ions (with currents exceeding 100 μA during pulse-on phase) with only minor pulse-to-pulse variations in intensity shape. have characterized internal energy H3+ N2O+ produced source, using...
Ion-neutral reactions are driving the formation of small molecules in gas phase interstellar clouds, where hydrogen and their ions by far most important collision partners for any species astrochemical network. Here we present absolute rate coefficient measurements <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:msup><a:mrow><a:mi>HD</a:mi></a:mrow><a:mo>+</a:mo></a:msup><a:mo>+</a:mo><a:mi mathvariant="normal">C</a:mi><a:mspace width="0.16em"/><a:mo>→</a:mo><a:mspace...
We used the monochromatic soft-x-ray beamline P04 at synchrotron-radiation facility PETRA III to resonantly excite strongest <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mn>2</a:mn><a:mi>p</a:mi><a:mtext>−</a:mtext><a:mn>3</a:mn><a:mi>d</a:mi></a:mrow></a:math> transitions in neonlike <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mi>Ni</b:mi><b:mspace width="0.28em"/></b:math> ions, <d:math...