AG Nörtershäuser

Welcome to AG Nörtershäuser

from left to right: Wilfried Nörtershäuser, Bernhard Maaß, Felix Sommer, Aineah Barasa, Rodolfo Sanchez, Jan Krause, Johannes Viering, Jörg Krämer, Konstantin Mohr, Kristian König, Simon Kaufmann, Kei Minamisono (Guest Scientist), Phillip Imgram, Tim Ratajczyk

Laser spectroscopic nuclear chart

Our Service to the Community:
An up-to-date nuclear chart with all isotopes that have been investigated by on-line laser spectroscopy, tables and references is provided here …>

Current News

  • 2018/04/16

    CRYRING News

    Time-resolved Fourier spectrum of the revolution frequencies

    During the last beam time at CRYRING from 12.03.-23.03 the ring was operated with 24Mg+ lowly charged ions.. The ions were injected into the ring and subsequently accelerated for the first time. The acceleration is seen by the time structure of the higher harmonics of 24Mg+ in the Schottky diagram (Figure).

  • 2018/03/22

    Phillip Imgram has completed his Master Thesis

    Phillip Imgram has completed his Master Thesis with the presentation “Accurate Isotope Shift Measurement in the D1 and D2 line of Barium Ions”. Congratulations!

  • 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.