A5023062512- Mass Spectrometry Techniques and Applications
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Radioactive contamination and transfer
- Advanced Chemical Physics Studies
- Nuclear physics research studies
- Isotope Analysis in Ecology
- Laser Design and Applications
- Radioactive element chemistry and processing
- Ion-surface interactions and analysis
- Atomic and Subatomic Physics Research
- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Laser-Matter Interactions and Applications
- Particle accelerators and beam dynamics
- Spectroscopy and Laser Applications
- Radioactive Decay and Measurement Techniques
- Nuclear Materials and Properties
- Radioactivity and Radon Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- X-ray Spectroscopy and Fluorescence Analysis
- Spectroscopy and Quantum Chemical Studies
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Solid State Laser Technologies
Johannes Gutenberg University Mainz
2015-2024
Université Paris-Saclay
2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023
CEA Paris-Saclay
2023
Technical University of Darmstadt
2023
GSI Helmholtz Centre for Heavy Ion Research
2023
Institut de Recherche sur les Lois Fondamentales de l'Univers
2023
KU Leuven
2023
University of Applied Sciences Mainz
2018
Bruker (Germany)
2015
At ISOLDE the majority of radioactive ion beams are produced using resonance ionization laser source (RILIS). This is based on resonant excitation atomic transitions by wavelength tunable radiation. Since its installation at facility in 1994, RILIS setup has been developed into a versatile remotely operated system comprising state-of–the-art solid state and dye lasers capable generating multiple high quality any range 210–950 nm. A continuous programme scheme development CERN other...
The radioactive element astatine exists only in trace amounts nature. Its properties can therefore be explored by study of the minute quantities artificially produced isotopes or performing theoretical calculations. One most important influencing chemical behaviour is energy required to remove one electron from valence shell, referred as ionization potential. Here we use laser spectroscopy probe optical spectrum near threshold. observed series Rydberg states enabled first determination...
The improvement in the performance of a conventional laser ion source and trap (LIST) project is presented, which envisages installation repeller electrode linear Paul trap/ion guide structure. This approach promises highest isobaric purity optimum temporal spatial control radioactive beam produced at an online isotope separator facility. functionality LIST was explored offline test separators University Mainz (UMz) ISOLDE/CERN, using UMz solid state system. Ionization efficiency selectivity...
A high repetition rate pulsed Ti:sapphire laser injection-locked to a continuous wave seed source is presented. spectral linewidth of 20 MHz at an average output power 4 W demonstrated. An enhanced tuning range from 710–920 nm with single broadband mirror set realized by the inclusion thin birefringent quartz plate for suppression unseeded emission. The properties have been analyzed using both scanning Fabry–Pérot interferometer as well crossed beam resonance ionization spectroscopy...
An overview of experimental approaches to sensitive and selective trace analysis long-lived radioactive isotopes is given, emphasizing methods based upon laser spectroscopy techniques. Two such laser-based methods, resonance ionization mass spectrometry atom trap analysis, have recently demonstrated high sensitivities selectivities which are comparable those more mature as accelerator low level counting. The has been used for a variety applications in broad range scientific technological...
The nuclear magnetic moments of $^{213}\mathrm{Ra}$ and $^{225}\mathrm{Ra}$ have been measured at ISOLDE (isotope separator the CERN synchrocyclotron) by observation Larmor precession optically pumped atoms in a fast beam. results ${\ensuremath{\mu}}_{I}$(${}^{213}$Ra)=0.6133(18)${\ensuremath{\mu}}_{N}$ ${\ensuremath{\mu}}_{1}$${(\mathrm{}}^{225}$Ra)= -0.7338(15)${\ensuremath{\mu}}_{N}$ provide an accurate test ab initio semiempirical calculations from optical hyperfine structures Ra i ii. .AE
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...
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...
Terbium-157 was radiochemically extracted from an irradiated tantalum target. Since the resulting material contained a significant impurity of
An injection-seeded high-repetition rate (∼10 kHz) Ti:sapphire laser with a spectral bandwidth of ∼20 MHz and an average output power above 1.5 W has been developed. We report on its demonstration characteristics respect to the spectral, temporal, spatial properties as well energy. In crossed-beam resonance ionization well-collimated thermal atomic beam, ∼200 hyperfine structure D2 transition at 308 nm 27Al resolved. Applications system in field insource spectroscopy for on-line produced...
The absolute masses of four long-lived transuranium nuclides, $^{241,243}\mathrm{Am}$, $^{244}\mathrm{Pu}$, and $^{249}\mathrm{Cf}$, in the vicinity deformed $N=152$ neutron shell closure have been measured directly with Penning-trap mass spectrometer TRIGA-TRAP. Our measurements confirm AME2012 values $^{241,243}\mathrm{Am}$ $^{244}\mathrm{Pu}$ within one standard deviation, which were indirectly determined, by decay spectroscopy studies. In case $^{249}\mathrm{Cf}$ mass, a discrepancy more...