• 2018/03/05

    Most precise laser spectroscopic high-voltage measurements published

    We have published the result of high-precision measurements of high-voltages up to 20000 V in the current issue of the Journal Metrologia. An accuracy of 5 ppm was realized at the ALIVE experiment using Ca+ ions. This is an improvement of a factor 20 compared to previous trials of laser-based high-voltage measurements.

  • 2018/03/01

    Solution of the Hyperfine Puzzle ?

    In our latest publication we report on NMR measurements of bismuth ions in different chemical environments in Physical Review Letters. The extracted new value for the magnetic moment of the isotope bismuth-209 drastically reduces the large discrepancy between theory and experiment in the hyperfine splitting measurements of hydrogen-like and lithium-like ions.

  • 2018/02/28

    New data for further investigations of the hyperfine Puzzle published

    The graph has been taken from the paper and shows the hyperfine structure of Bi-208.

    Our article about the improved measurement of the magnetic moment of Bi-208 with the COLLAPS experiment at ISOLDE/CERN appeared in Physics Letters B. From the results we have also predicted the hyperfine structure splittings in hydrogen-like and lithium-like bismuth as well as the so-called specific difference of the two hyperfine structure splittings.

  • 2018/02/23

    CRYRING News

    From 14.02.-16.02. we mounted the fluorescence-chamber for the laser-spectroscopy experiment at CRYRING. Scrapers for aligning laser and ion beam were installed in parallel.

  • 2018/02/06

    Jan Krause has completed his Master Thesis

    Jan Krause has completed his Master Thesis with the presentation “Isotope Shift of 10,11B in the 2p -> 3s transition determined by Resonance Ionization Mass Spectrometry”. Congratulations!

  • 2018/02/05

    Research stay of Kei Minamisono from NSCL/MSU

    We welcome Kei Minamisono from the National Superconducting Cyclotron Laboratory, for a one-week long research stay in our group. He will give a talk entitled “Nuclear structure studies using lasers at NSCL/MSU” in the CRC1245 Colloquium on Thursday February 08th at 1 pm.

  • 2018/01/22

    Installation of a liquid metal ion source at the ALIVE project

    A Liquid Metal Ion Source (LMIS) for the production of indium ions was successfully installed and commissioned at the ALIVE experiment. This ion source was designed and constructed at the TU Dresden and is usually used as an ion thruster for satellites.

  • 2018/01/16

    Annual COLLAPS Collaboration Meeting

    The COLLAPS Collaboration meets at TU Darmstadt

    The COLLAPS Collaboration Meeting was held on January 15-16 in Darmstadt. During the fruitful meeting, results from the beamtimes in 2017 as well as plans for beamtimes in 2018 were discussed.

  • 2017/12/20


    In December the in-kind contracts between FAIR and Sweden were signed. Hence, tenders for the new superconducting magnet for SPECTRAP can be invited.

  • 2017/11/17

    Magnetic moment and quadrupole moment of Fe-53 published

    The measurement of the magnetic dipole moment and the electric quadrupole moment of Fe-53 has been published in Physical Review C. The measurements were performed at the National Superconducting Cyclotron Laboratory NSCL with the BECOLA beamline, which has once more demonstrated its large potential for measurements on exotic isotopes.