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Frank Jensen

Decay Rate Measurement of the First Vibrationally Excited State of MgH+ in a Cryogenic Paul Trap

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  • O.O. Versolato, Max-Planck-Institut für Kernphysik, Germany
  • M. Schwarz, Max-Planck-Institut für Kernphysik, Germany
  • A.K. Hansen, Denmark
  • A.D. Gingell, Denmark
  • A. Windberger, Max-Planck-Institut für Kernphysik, Germany
  • L. Kłosowski, Nicolaus Copernicus University, Poland
  • J. Ullrich, Max-Planck-Institut für Kernphysik, Germany
  • F. Jensen
  • J.R. Crespo López-Urrutia, Max-Planck-Institut für Kernphysik, Germany
  • M. Drewsen
We present a method to measure the decay rate of the first excited vibrational state of polar molecular ions that are part of a Coulomb crystal in a cryogenic linear Paul trap. Specifically, we have monitored the decay of the |ν=1,J=1 towards the |ν=0,J=0 level in MgH by saturated laser excitation of the |ν=0,J=2 -|ν=1,J=1 transition followed by state selective resonance enhanced two-photon dissociation out of the |ν=0,J=2 level. The experimentally observed rate of 6.32(0.69) s1 is in excellent agreement with the theory value of 6.13(0.03) s1 (this Letter). The technique enables the determination of decay rates, and thus absorption strengths, with an accuracy at the few percent level.
Original languageEnglish
JournalPhysical Review Letters
Pages (from-to)053002
Number of pages5
Publication statusPublished - 30 Jul 2013

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