Vibronic spectroscopy of sympathetically cooled CaH${}^{+}$

Abstract

We report the measurement of the 1${}^1\Sigma ⟶$ 2${}^1\Sigma$ transition of CaH${}^{+}$ by resonance-enhanced photodissociation of CaH${}^{+}$ that is co-trapped with laser-cooled Ca${}^{+}$ . We observe four resonances that we assign to transitions from the vibrational $v$=0 ground state to the $v^{\prime }$=1-4 excited states based on theoretical predictions. A simple theoretical model that assumes instantaneous dissociation after resonant excitation yield results in good agreement with the observed spectral features except for the unobserved $v^{\prime }$=0 peak. The resolution of our experiment is limited by the mode-locked excitation laser, but this survey spectroscopy enables future rotationally resolved studies with applications in astrochemistry and precision measurement.

arXiv commentpre-peer-reviewed version of R. Rugango et al. ChemPhysChem, (Early online see DOI) (2016). Peer-reviewed version will be arxived after the embargo period

References in corpus (10)

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• Precision Spectroscopy of Polarized Molecules in an Ion Trap
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• Precision Spectroscopy of Molecular Hydrogen Ions: Towards Frequency Metrology of Particle Masses
• Decay rate measurement of the first vibrationally excited state of MgH${}^{+}$ in a cryogenic Paul trap

Cited by in corpus (7)

• A Method for Preparation and Readout of Polyatomic Molecules in Single Quantum States
• Quantum-Logic Detection of Chemical Reactions
• A room-temperature ion trapping apparatus with hydrogen partial pressure below $10^{-11}$ mBar
• Increase of barium ion-trap lifetime via photodissociation
• Reassigning the CaH${}^{+}$ 1${}^1\Sigma \to$ 2${}^1\Sigma$ vibronic transition with CaD${}^{+}$
• Photodissociation spectra of single trapped CaOH+ molecular ions
• Precise Determination of Excited State Rotational Constants and Black-Body Thermometry in Coulomb Crystals of Ca${}^{+}$ and CaH${}^{+}$