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arXiv · 1101.4259

Molecular ion trap-depletion spectroscopy of BaCl$^+$

Kuang Chen·Steven J. Schowalter·Svetlana Kotochigova·Alexander Petrov·Wade G. Rellergert·Scott T. Sullivan·Eric R. Hudson
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Abstract

We demonstrate a simple technique for molecular ion spectroscopy. BaCl$^+$ molecular ions are trapped in a linear Paul trap in the presence of a room-temperature He buffer gas and photodissociated by driving an electronic transition from the ground X$^1Σ^+$ state to the repulsive wall of the A$^1Π$ state. The photodissociation spectrum is recorded by monitoring the induced trap loss of BaCl$^+$ ions as a function of excitation wavelength. Accurate molecular potentials and spectroscopic constants are determined. Comparison of the theoretical photodissociation cross-sections with the measurement shows excellent agreement. This study represents the first spectroscopic data for BaCl$^+$ and an important step towards the production of ultracold ground-state molecular ions.

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Kuang Chen, Steven J. Schowalter, Svetlana Kotochigova, Alexander Petrov, Wade G. Rellergert, Scott T. Sullivan, Eric R. Hudson. 2011-01-22. Molecular ion trap-depletion spectroscopy of BaCl$^+$. https://doi.org/10.1103/physreva.83.030501

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