TY - GEN AU - Berrocal Sánchez, Joaquín AU - Hernández, A. AU - Arrazola, I. AU - Domínguez González, Francisco AU - Carrasco Sanz, Ana AU - Fernández Baldomero, Francisco J. AU - Block, M. AU - Rodríguez Rubiales, Daniel PY - 2024 UR - https://hdl.handle.net/10481/91350 AB - We use an electric-dipole laser-driven transition to precisely measure the cyclotron-frequency ratios of the pairs 42Ca+−40Ca+, 44Ca+−40Ca+, and 48Ca+−40Ca+ in a 7-tesla Penning trap. A single laser-cooled (T≈1 mK) ion serves, together with... LA - eng PB - American Physical Society TI - Penning-trap eigenfrequency measurements with optical radiofrequency detectors DO - 10.1103/PhysRevResearch.6.L012001 ER -