A5086529903- Atomic and Molecular Physics
- Nuclear physics research studies
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Radioactive element chemistry and processing
- Atomic and Subatomic Physics Research
- Analytical Chemistry and Sensors
- Nuclear Physics and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Plasma Diagnostics and Applications
- Rare-earth and actinide compounds
- Nuclear Materials and Properties
- Laser-induced spectroscopy and plasma
Johannes Gutenberg University Mainz
2022-2024
Warsaw University of Technology
2018
Abstract The atomic structure of neptunium (Np) was investigated by two-step resonance ionization spectroscopy. study involved exploring ground-state transitions as well following to high-lying states just below the potential (IP) or auto-ionizing above IP. That resulted in identification schemes, suitable for trace analysis and nuclear investigations. lifetimes two excited located at 25,342.48 $$\, \text {cm}^{-1} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow>...
We report on the development, characterization, and first application of a specialized resonance ionization laser ion source for high-resolution spectroscopy applications below usual hot cavity Doppler broadening limitations, on-line experiments at CERN-ISOLDE. The new PI-LIST comprises perpendicular laser/atom beam interaction in radio-frequency quadrupole unit directly downstream atomizer cavity. A spectral linewidth 200–300 MHz is demonstrated, with potential to achieve 100 MHz. Compared...
We report on high-resolution laser spectroscopy studies $^{249\text{--}253}\mathrm{Cf}$ with spectral linewidths in the order of 100 MHz carried out at RISIKO mass separator Mainz University. In total three atomic ground-state transitions were investigated and hyperfine parameters for odd-$A$ isotopes isotope shift all examined have been determined from measured spectra. The measurements allowed tracking changes mean-squared charge radii across deformed nuclear shell closure $N=152$, whereby...
The quantum-mechanical nuclear-shell structure determines the stability and limits of existence heaviest nuclides with large proton numbers Z ≳ 100 (refs.
In this paper we present the results of ion mobility measurements made in pure carbon tetrafluoride (CF4) and gaseous mixtures argon with (Ar-CF4) for pressures ranging from 6 to 10 Torr (8–10.6 mbar) low reduced electric fields Td 25 range (2.4-6.1 kV⋅cm−1⋅bar−1), at room temperature. The time arrival spectra revealed only one peak throughout entire studied which was attributed CF3+. However, Ar concentrations above 70%, a bump starts appear left side main higher than 15 Td, impurities....
The radiation detection resonance ionization spectroscopy (RADRIS) technique enables laser spectroscopic investigations of the heaviest elements which are produced in atom-at-a-time quantities from fusion-evaporation reactions. To achieve a high efficiency, is performed buffer-gas environment used to thermalize and stop high-energy evaporation residues behind velocity filter SHIP. required cyclic measurement procedure combination with applied filament collection for neutralization as well...
Abstract We report on the investigation of atomic structure curium ( $$Z=96$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>Z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>96</mml:mn> </mml:mrow> </mml:math> ) by resonance ionization spectroscopy. Three different excited energy levels were populated from $$5f^{7}6d7s^{2}\,^{9}D^{o}_{2}$$ <mml:mn>5</mml:mn> <mml:msup> <mml:mi>f</mml:mi> <mml:mn>7</mml:mn> </mml:msup> <mml:mn>6</mml:mn> <mml:mi>d</mml:mi>...
Abstract Nuclear ground state properties of $$^{237,239}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mrow> <mml:mn>237</mml:mn> <mml:mo>,</mml:mo> <mml:mn>239</mml:mn> </mml:mrow> </mml:mmultiscripts> </mml:math> Np were investigated by high-resolution laser spectroscopy at the RISIKO mass separator off-line radioactive beam facility University Mainz. The isotope shifts and hyperfine parameters determined in two different atomic...
We report on the development and application of Field Ionization Laser Ion Source Trap (FI-LIST) at RISIKO mass separator Mainz University. The FI-LIST is an adaptation well-established LIST unit developed successfully adapted to CERN-ISOLDE. It specifically designed for field ionization highly excited atoms in a homogeneous electric field. To assess performance device future use radioactive species e.g. actinides, we conducted potential (IP) measurements ytterbium, which IP precisely known....
In this paper we present the results of ion mobility measurements made in gaseous mixtures xenon with carbon tetrafluoride (Xe-CF4) for pressures ranging from 6 to 10 Torr (8-10.6 mbar) and low reduced electric fields 25 Td range (2.4-6.1 kV⋅cm−1⋅bar−1), at room temperature. The time-of-arrival spectra revealed one or two peaks depending on gas relative abundances, which were attributed CF3+ Xe2+ ions. However, Xe concentrations above 60%, only peak remains (Xe2+). mobilities obtained...