46 citations · 78 across the 2 of their papers we have counts for
3 papers
Two-photon laser excitation of trapped 232Th+ ions via the 402 nm resonance line
O. A. Herrera-Sancho, M. V. Okhapkin, K. Zimmermann +5
Experiments on one- and two-photon laser excitation of 232Th+ ions in a radiofrequency ion trap are reported. As the first excitation step, the strongest resonance line at 402 nm f…
Laser ablation loading of a radiofrequency ion trap
K. Zimmermann, M. V. Okhapkin, O. A. Herrera-Sancho +1
The production of ions via laser ablation for the loading of radiofrequency (RF) ion traps is investigated using a nitrogen laser with a maximum pulse energy of 0.17 mJ and a peak…
Prospects for a Nuclear Optical Frequency Standard based on Thorium-229
E. Peik, K. Zimmermann, M. Okhapkin +1
The 7.6-eV-isomer of Thorium-229 offers the opportunity to perform high resolution laser spectroscopy of a nuclear transition. We give a brief review of the investigations of this…