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dc.creatorZiemkiewicz, Michael P.en_US
dc.creatorPluetzer, Christianen_US
dc.creatorNesbitt, David J.en_US
dc.creatorScribano, Yohannen_US
dc.creatorFaure, Alexandreen_US
dc.creatorVan Der Avoird, Aden_US
dc.date.accessioned2012-07-09T19:35:06Z
dc.date.available2012-07-09T19:35:06Z
dc.date.issued2012en_US
dc.identifier2012-WF-05en_US
dc.identifier.urihttp://hdl.handle.net/1811/52484
dc.descriptionAuthor Institution: JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado, USA; CNRS-Universite de Bourgogne, Dijon, France; CNRS, Institut de Planetologie et d'Astrophysique de Grenoble, France; Radboud University, Nijmegen, The Netherlandsen_US
dc.description.abstractWe present spectroscopic studies on the H$_2$-H$_2$O complex, providing information on the binding of these astrochemically-significant molecules. Understanding this interaction is crucial for further understanding the production of H$_2$ from atomic hydrogen on interstellar dust grain surfaces, which are often covered with an icy mantel. We generate these clusters using a slit supersonic jet expansion which cools to below 5 K, a temperature which is sufficiently low for observing this species whose binding energy is ~ 60 cm$^{-1}$. The experimental detection method consists of an infrared vibrational excitation followed by a 193 nm pulse to photolyze H$_2$O and laser induced fluorescence on the OH product. In conjunction with theoretical studies presented in the accompanying talk, we identify two overtone bands associated with excitation of the $|02-\rangle \leftarrow |00+\rangle$ transition in the water moiety. Theory and experiment agree to within 0.2 cm$^{-1}$, which attests to the accuracy of the method used to make predictions, as shown in the accompanying talk. Additional time and frequency domain measurements are performed with this three laser experiment to obtain information on predissociation dynamics, where internal H$_2$O vibration is transferred to the intermolecular coordinate. Theoretically-generated excited state wavefunctions are used to obtain further insight into the significant dependence of predissociation lifetime on the upper state in the infrared cluster transition.en_US
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleOVERTONE VIBRATIONAL SPECTROSCOPY AND DYNAMICS IN H$_2$-H$_2$O COMPLEXES: A COMBINED THEORETICAL AND EXPERIMENTAL STUDYen_US
dc.typeArticleen_US


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