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Measurement of the branching fractions and lifetime of the 5D5/2 level of Ba+

Carolyn Auchter, Thomas W. Noel, Matthew R. Hoffman, Spencer R. Williams, and Boris B. Blinov
Phys. Rev. A 90, 060501(R) – Published 17 December 2014

Abstract

We present a measurement of the branching fractions for decay from the long-lived 5D5/2 level in Ba138+. The branching fraction for decay into the 6S1/2 ground state was found to be 0.846(25)stat(4)sys. We also report an improved measurement of the 5D5/2 lifetime, τ5D5/2=31.2(0.9) s. Together these measurements provide an experimental determination of transition rates for decay out of the 5D5/2 level. The low (<7×1012 Torr) pressure in the ion trap in which these measurements were made simplified data acquisition and analysis. Comparison of the experimental results with theoretical predictions of the transition rates shows good agreement.

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  • Received 2 September 2014

DOI:https://doi.org/10.1103/PhysRevA.90.060501

©2014 American Physical Society

Authors & Affiliations

Carolyn Auchter, Thomas W. Noel*, Matthew R. Hoffman, Spencer R. Williams, and Boris B. Blinov

  • Department of Physics, University of Washington, Seattle, Washington 98195, USA

  • *Corresponding author: noelt@u.washington.edu

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Issue

Vol. 90, Iss. 6 — December 2014

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