A5024836193- Nuclear physics research studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Astronomical and nuclear sciences
- Laser-induced spectroscopy and plasma
- Advanced Chemical Physics Studies
- Radioactive element chemistry and processing
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Radioactive Decay and Measurement Techniques
- Quantum Chromodynamics and Particle Interactions
- Ion-surface interactions and analysis
- Nuclear reactor physics and engineering
- Radioactive contamination and transfer
- Isotope Analysis in Ecology
- Adaptive optics and wavefront sensing
- Stellar, planetary, and galactic studies
- Advanced Frequency and Time Standards
- History and advancements in chemistry
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Soil Geostatistics and Mapping
- Particle physics theoretical and experimental studies
- Rare-earth and actinide compounds
KU Leuven
2016-2025
Centro de Estudios de Física del Cosmos de Aragón
2018-2022
National Superconducting Cyclotron Laboratory
2009-2019
Michigan State University
2009-2013
Johannes Gutenberg University Mainz
2005-2010
Goethe University Frankfurt
2008
Universidad de Cantabria
2006
The masses of six neutron-deficient rare holmium and thulium isotopes close to the proton drip line were determined with SHIPTRAP Penning trap mass spectrometer. For first time proton-unbound 144,145Ho 147,148Tm directly measured. separation energies derived from measured values compared predictions formulas. new are used determine location for more accurately.Received 26 October 2006DOI:https://doi.org/10.1103/PhysRevLett.100.012501©2008 American Physical Society
Abstract Resonant laser ionization and spectroscopy are widely used techniques at radioactive ion beam facilities to produce pure beams of exotic nuclei measure the shape, size, spin electromagnetic multipole moments these nuclei. However, in such measurements it is difficult combine a high efficiency with spectral resolution. Here we demonstrate on-line application atomic supersonic gas jet, technique suited for high-precision studies ground- isomeric-state properties located extremes...
A comparative vacuum ultraviolet spectroscopy study conducted at ISOLDE-CERN of the radiative decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Th</a:mi><a:mprescripts/><a:none/><a:mrow><a:mn>229</a:mn><a:mi>m</a:mi></a:mrow></a:mmultiscripts></a:math> nuclear clock isomer embedded in different host materials is reported. The ratio number photons and <b:math...
The masses of very neutron-deficient nuclides close to the astrophysical rp- and νp-process paths have been determined with Penning trap facilities JYFLTRAP at JYFL/Jyväskylä SHIPTRAP GSI/Darmstadt. Isotopes from yttrium (Z=39) palladium (Z=46) produced in heavy-ion fusion-evaporation reactions. In total, 21 were studied, almost half mass values experimentally for first time: 88Tc, 90−92Ru, 92−94Rh, 94,95Pd. For 95Pdm, (21/2+) high-spin state, a direct determination was performed. Relative...
Until recently, ground-state nuclear moments of the heaviest nuclei could only be inferred from spectroscopy, where model assumptions are required. Laser spectroscopy in combination with modern atomic structure calculations is now able to probe these directly, a comprehensive and nuclear-model-independent way. Here we report on unique access differential mean-square charge radii ^{252,253,254}No, therefore changes size shape. State-of-the-art density functional describe well region heavy...
One of the most important atomic properties governing an element's chemical behavior is energy required to remove its least-bound electron, referred as first ionization potential. For heaviest elements, this fundamental quantity strongly influenced by relativistic effects which lead unique properties. Laser spectroscopy on atom-at-a-time scale was developed and applied probe optical spectrum neutral nobelium near threshold. The potential determined here with a very high precision from...
For the analysis of low-statistics counting experiments, a traditional nonlinear least squares minimization routine may not always provide correct parameter and uncertainty estimates due to assumptions inherent in algorithm(s). In response this, user-friendly Python package (SATLAS) was written an easy interface between data variety algorithms which are suited for analyzinglow, as well high, statistics data. The advantage this is that it allows user define their own model function then...
The highest precision in the determination of nuclear and atomic masses can be achieved by Penning trap mass spectrometry. value is obtained through a measurement cyclotron frequency stored charged particle. Two different approaches are used at spectrometer TRIGA-TRAP for determination: destructive Time-Of-Flight Ion Cyclotron Resonance (TOF-ICR) technique non-destructive Fourier Transform (FT-ICR) method. New developments both techniques described, which will improve detection efficiency...
Using resonance ionization spectroscopy the first-ionization potential of actinium has been determined by analyzing different Rydberg series in two-color resonant laser excitation. Three individual were investigated, converging toward ionic ground state and first- second-excited ion, respectively. A combined analysis convergence limits leads to a consistent value for Ac...
In-gas-cell laser ionization spectroscopy studies on the neutron deficient 97–101Ag isotopes have been performed with LISOL setup. Magnetic dipole moments and mean-square charge radii determined for first time exception of 101Ag, which was found in good agreement previous experimental values. The reported results allow tentatively assigning spin 97,99Ag to 92 confirming presence an isomeric state these two isotopes, whose collapsed hyperfine structure suggests a 12. effect N=50 shell closure...
The in-gas laser ionization and spectroscopy (IGLIS) technique was applied on the $^{212--215}\mathrm{Ac}$ isotopes, produced at Leuven Isotope Separator On-Line (LISOL) facility by using in-gas-cell in-gas-jet methods. first application under on-line conditions of method showed a superior performance in terms selectivity, spectral resolution, efficiency comparison with method. Following analysis both experiments, magnetic-dipole moments for electric-quadrupole nuclear spins...
Penning trap mass spectrometry is presented as a complementary tool to nuclear spectroscopy experiments for the study of structure in vicinity $N=40$, $Z=28$. High-precision measurements $^{63\ensuremath{-}66}\mathrm{Fe}$ and $^{64\ensuremath{-}67}\mathrm{Co}$ isotopes have been carried out with Low Energy Beam Ion Trap (LEBIT) spectrometer. The newly obtained values $^{66}\mathrm{Fe}$ $^{67}\mathrm{Co}$ are presented, together previously reported LEBIT this region. In case...
Hyperfine structure and isotope shifts have been measured for the ground isomeric states in neutron-deficient isotopes 179–184Tl using 276.9-nm transition. The experiment has performed at CERN-Isotope Separator On-Line facility in-source resonance-ionization laser spectroscopy technique. Spins 179,181,183Tl determined as I=1/2. Magnetic moments changes nuclear mean-square charge radii deduced. By applying additivity relation magnetic of odd-odd Tl nuclei leading configuration assignments...
The first accurate measurements of the α-decay branching ratio and half-life Iπ=1/2+ ground state in 181Tl have been made, along with determination magnetic moments I=1/2 spin assignments states 177,179Au. results are discussed within complementary systematics reduced widths nuclear g factors low-lying, neutron-deficient lead region. findings shed light on unexpected hindrance 1/2+→1/2+, 181Tl→g177Aug α decay, which is explained by a mixing π3s1/2 π2d3/2 configurations 177Aug, whilst 181Tlg...