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Production of large molecular ion crystals via sympathetic cooling by laser-cooled Ba+
Journal of Physics B: Atomic, Molecular and Optical Physics
We have produced ensembles of cold 16 O + 2 , 40 Ar + , 12 C 16 O + 2 , and various isotopes of barium ions ( 135 Ba + , 136 Ba + and 137 Ba + ) via sympathetic cooling with laser-cooled 138 Ba + in a linear radiofrequency trap. The sympathetically cooled species were embedded in the centre of large 138 Ba + Coulomb crystals containing up to 2000 ions and were identified by motional resonance excitation. Crystals with molecular fractions exceeding 70% were obtained. The observed multi-speciesdoi:10.1088/0953-4075/38/20/004 fatcat:73ruzby3pbdp3ovwy6pdwcqfiy