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Laser spectroscopic nuclear chart
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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
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2020/08/07
COALA Apparatus on Title Page of Review of Scientific Instruments
A photo of our COALA setup decorates the title page of the journal “Review of Scientific Instruments” in which our article on the COALA setup and its first results has appeared. The invited article has also been featured by a SciLight article. go
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2020/07/24
Electron storage in the HITRAP cooling trap
We have succeeded for the first time to store electrons over a macroscopic period of time in the newly designed cooling trap of the HITRAP facility (GSI). The electrons are produced in an electron source two meters away from the Penning trap and are guided towards the trap by a combination of several magnetic coils. go
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2020/07/07
New experiment for ‘Fortgeschrittenenpraktikum’ (advanced practical experiments course for students) delivers first results
We have developed a compact collinear laser spectroscopy setup that allows Bachelor students to gain practical experience with the technique. The setup (see figure) is a simplified and compact version of the KOALA beamline. go
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2020/07/06
Karen Antachoque has completed her Bachelor Thesis
Karen Antachoque has completed her Bachelor Thesis with the presentation „Implementation of a velocity filter at KOALA for ion-source specification“. Congratulations! go
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2020/06/09
Surprisingly regular behavior of Sn isotopes observed
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2020/06/04
Three Articles in the Proceedings of the 1st International PLATAN Conference
The Conference Proceedings of the first International PLATAN conference, which was held a year ago in Mainz appeared in the Journal Hyperfine Interactions. It contains three articles of our group:
Phillip Imgram presents a review of the scientific work and technological developments at the KOALA beamline go -
2020/05/26
Proposal for a Raman Filter featured as “Editors' Suggestion” in Phys. Rev. A
We have studied the possibility of using a Raman scheme to transfer ions within a beam from the ground to a higher-lying metastable state with high-velocity selectivity. This could find important applications in high-precision laser spectroscopy and optical high-voltage measurements.
The paper has been published in Physical Review A today and has been featured as an “Editors' Suggestion”. go -
2020/05/11
New Article on Properties of Neutron Matter
The differences of charge radii of mirror nuclei – nuclei with exchanged numbers of protons and neutrons – provide information on the equation of state (EOS) of neutron matter. The differences of the recently measured charge radii of 36,38Ca and those of their stable mirror partner 36S and 38Ar allowed us to restrict a parameter of the EOS. go
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2020/04/21
New Measurements on the Accuracy of Wavemeters
A series of two articles on the accuracy of commercial wavemeters has appeared in Applied Physics B.
The first part by Verlinde et al. is the product of a collaboration of several groups using wavemeters for nuclear-structure related research at on-line facilities. All participating groups are members of the LASPEC collaboration to perform laser spectroscopy at FAIR. go -
2020/04/01
Measurement of the charge radius of Ni-68 published in PRL
For the first time, a short-lived Ni isotope was studied by laser spectroscopy at ISOLDE. We have determined the charge radius of Ni-68 and the result is compared to calculations using chiral effective field theory.
Ni-68 is now the only short-lived nucleus for which the charge radius and the nuclear dipole polarizability are determined, which allows to benchmark the correlations between these observables that are obtained in nuclear theory. go