6 papers
Toward nanophotonic platforms for solid-state Th nuclear clocks
Sandro Kraemer, Karen Mamian, Toby Bi +18
While the Th nuclear isomer has recently been observed and laser-excited, converting optical nuclear manipulation into a chip-scale solid-state frequency standard remains a…
Multiply charged uranium monoxide as a versatile probe of fundamental physics
Jonas Stricker, Konstantin Gaul, Paul Fischer +8
Multiply charged actinide molecules provide a unique platform to study fundamental physics and the chemical bond under extreme conditions. Beyond the inherently large relativistic…
Improved limit on the effective electron neutrino mass with the ECHo-1k experiment
Fabienne Adam, Felix Ahrens, Luis E. Ardila Perez +56
The effective electron neutrino mass can be determined by analyzing the endpoint region of the Ho electron capture spectrum, provided a measurement with high energy resolut…
Study of thorium in hypersonic gas jets: Ionization potentials of Th and Th
A. Claessens, F. Ivandikov, M. Brasseur +10
Laser ionization spectroscopy was performed on both neutral and singly ionized Th with the aim of identifying the nuclear-clock isomer in the singly charged ionic state of…
Laser fluence-dependent production of molecular thorium ions in different charge states for trapped-ion experiments
Jonas Stricker, Jean Velten, Valerii Andriushkov +8
Thorium ions and molecules, recognized for their distinctive nuclear and atomic attributes, are central to numerous trapped-ion experiments globally. Our study introduces an effect…
Laser spectroscopy on the hyperfine structure and isotope shift of sympathetically cooled Th ions
G. Zitzer, J. Tiedau, Ch. E. Düllmann +2
The hyperfine structure of Th ions in the nuclear ground state is investigated via laser spectroscopy of trapped Th ions that are sympathetically cooled by la…