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arXiv · 1609.09478

Vibronic spectroscopy of sympathetically cooled CaH$^+$

Rene Rugango·Aaron T. Calvin·Smitha Janardan·Gang Shu·Kenneth R. Brown
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Abstract

We report the measurement of the 1$^{1}\Sigma\longrightarrow$ 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 $v'$=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 $v'$=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.

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Rene Rugango, Aaron T. Calvin, Smitha Janardan, Gang Shu, Kenneth R. Brown. 2016-09-29. Vibronic spectroscopy of sympathetically cooled CaH$^+$. https://doi.org/10.1002/cphc.201600645

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