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dc.contributor.advisorPerry, Joseph
dc.contributor.authorCalvin, Aaron
dc.date.accessioned2018-08-20T15:35:52Z
dc.date.available2018-08-20T15:35:52Z
dc.date.created2018-08
dc.date.issued2018-05-18
dc.date.submittedAugust 2018
dc.identifier.urihttp://hdl.handle.net/1853/60241
dc.description.abstractCaH+ is an astrophysically relevant molecule with proposed applications in fundamental physics. We use CaH+ co-trapped with Doppler cooled Ca+ to perform spectroscopy using two-photon photodissociation with a frequency doubled, mode locked Ti:sapph laser. This method was used to measure the vibronic spectrum of the 11 Σ, v = 0 → 2 1Σ, v' = 0, 1, 2, 3 transitions. Spectroscopy on the deuterated isotopologue, CaD+ confirmed a revised assignment of the CaH+ vibronic levels and a disagreement with MS-CASPT2 theoretical calculations by approximately 700 cm-1. Updated high-level coupled-cluster calculations that include core-valence correlations reduce the disagreement between theory and experiment to 300 cm-1. The broad bandwidth of the pulsed Ti:sapph provided an advantage for the initial search for transitions, but did not allow spectral resolution of rotational transitions. Pulse shaping was applied to spectrally narrow the linewidth of the pulsed laser to obtain rotational constants for the 21 Σ, v' = 0, 1, 2, 3 and 11 Σ, v = 0 states. This measurement has value in the control of quantum states of the molecule for high precision measurements of rovibrational transitions using quantum logic. Molecule-cold atom collisions for possible buffer gas cooling can also be tested using this method.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherGeorgia Institute of Technology
dc.subjectSpectroscopy
dc.subjectCoulomb crystal
dc.subjectIon trapping
dc.subjectLaser cooling
dc.titleRovibronic spectroscopy of sympathetically cooled CaH+
dc.typeDissertation
dc.description.degreePh.D.
dc.contributor.departmentChemistry and Biochemistry
thesis.degree.levelDoctoral
dc.contributor.committeeMemberSherrill, David
dc.contributor.committeeMemberOrlando, Thomas
dc.contributor.committeeMemberRaman, Chandra
dc.date.updated2018-08-20T15:35:52Z


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