Lohse S, Berrocal J, Böhland S, van de Laar J, Block M, Chenmarev S, Düllmann Ch E, Nagy Sz, Ramírez J G, Rodríguez D
Department Chemie - Standort TRIGA, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany.
Departamento de Física Atómica, Molecular y Nuclear, Universidad de Granada, 18071 Granada, Spain.
Rev Sci Instrum. 2020 Sep 1;91(9):093202. doi: 10.1063/5.0015011.
We report on cyclotron frequency measurements on trapped Pb ions by means of the non-destructive Fourier-transform ion-cyclotron-resonance technique at room temperature. In a proof-of-principle experiment using a quartz crystal instead of a coil as a resonator, we have alternately carried out cyclotron frequency measurements for Pb and Pb with the sideband coupling method to obtain 21 cyclotron-frequency ratios with a statistical uncertainty of 6 × 10. The mean frequency ratio R¯ deviates by about 2σ from the value deduced from the masses reported in the latest Atomic Mass Evaluation. We anticipate that this shift is due to the ion-ion interaction between the simultaneously trapped ions (≈100) and will decrease to a negligible level once we reach single-ion sensitivity. The compactness of such a crystal makes this approach promising for direct Penning-trap mass measurements on heavy and superheavy elements.
