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arXiv · 1404.4609

Action spectroscopy of SrCl$^+$ using an integrated ion trap time-of-flight mass spectrometer

Prateek Puri·Steven J. Schowalter·Svetlana Kotochigova·Alexander Petrov·Eric R. Hudson
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Abstract

The photodissociation cross-section of SrCl$^+$ is measured in the spectral range of 36000 -- 46000 cm$^{-1}$ using a modular time-of-flight mass spectrometer (TOF-MS). By irradiating a sample of trapped SrCl$^+$ molecular ions with a pulsed dye laser, X$^1Σ^+$ state molecular ions are electronically excited to the repulsive wall of the A$^1Π$ state, resulting in dissociation. Using the TOF-MS, the fragments are detected and the photodissociation cross-section is determined for a broad range of photon energies. Detailed $\textit{ab initio}$ calculations of the molecular potentials and spectroscopic constants are also performed and are found to be in good agreement with experiment. The spectroscopic constants for SrCl$^+$ are also compared to those of another alkaline earth chalcogen, BaCl$^+$, in order to highlight structural differences between the two molecular ions. This work represents the first spectroscopy and $\textit{ab initio}$ calculations of SrCl$^+$.

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Prateek Puri, Steven J. Schowalter, Svetlana Kotochigova, Alexander Petrov, Eric R. Hudson. 2014-04-17. Action spectroscopy of SrCl$^+$ using an integrated ion trap time-of-flight mass spectrometer. https://doi.org/10.1063/1.4885363

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