Precision measurement of the branching fractions of the 5p 2 P 1/2 state in 88 Sr + with a single ion in a micro fabricated surface trap

Abstract

We measured the branching fractions for the decay of the 5p 2 P 1/2 state of 88 Sr + by applying a recently demonstrated photon-counting sequential method (M. Ramm et al., Phys. Rev. Lett. 111, 023004) to a single ion laser-cooled in a micro fabricated surface trap. The branching fraction for the decay into the 5s 2 S 1/2 ground level was found to be p = 0.9453 +0.0007 --0.0005. This result is in good agreement with recent theoretical calculations but disagrees with previous experimental measurements, however affected by a one order of magnitude larger uncertainty. This experiment also demonstrates the reliability and the performances of ion micro trap technology in the domain of precision measurements and spectroscopy. PACS numbers: 32.70.Cs, 06.30.Ft, 37.10.Ty

References in corpus (8)

• Quantum computing with trapped ions
• Precision measurement of the branching fractions of the 4P3/2 decay of Ca II
• Measurement of dipole matrix elements with a single trapped ion
• Precision measurement of the branching ratio in the 6P3/2 decay of BaII with a single trapped ion
• Precision measurement of branching fractions of ${}^{138}$Ba${}^{+}$: Testing many body theories below one percent level
• Measurement of the branching fractions and lifetime of the $5D_{5/2}$ level of Ba${}^{+}$
• Precision measurement of the 5 2S1/2 - 4 2D5/2 quadrupole transition isotope shift between 88Sr+ and 86Sr+
• Precision spectroscopy technique for dipole allowed transitions in laser cooled ions

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• Iterative Precision Measurement of Branching Ratios Applied to 5P states in 88Sr+
• Absolute Single Ion Thermometry