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

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${}^1{\Sigma }^{+}$ state molecular ions are electronically excited to the repulsive wall of the A${}^1\Pi$ 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 $\text{ab initio}$ 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 $\text{ab initio}$ calculations of SrCl${}^{+}$.

6 pages, 5 figures

References in corpus (4)

• Candidate molecular ions for an electron electric dipole moment experiment
• Precision Spectroscopy of Polarized Molecules in an Ion Trap
• Broadband velocity modulation spectroscopy of HfF^+: towards a measurement of the electron electric dipole moment
• Laser-cooling-assisted mass spectrometry

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