dc.creator Ziemkiewicz, Michael P. en_US dc.creator Pluetzer, Christian en_US dc.creator Nesbitt, David J. en_US dc.creator Scribano, Yohann en_US dc.creator Faure, Alexandre en_US dc.creator Van Der Avoird, Ad en_US dc.date.accessioned 2012-07-09T19:35:06Z dc.date.available 2012-07-09T19:35:06Z dc.date.issued 2012 en_US dc.identifier 2012-WF-05 en_US dc.identifier.uri http://hdl.handle.net/1811/52484 dc.description Author 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 Netherlands en_US dc.description.abstract We 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.iso en en_US dc.publisher Ohio State University en_US dc.title OVERTONE VIBRATIONAL SPECTROSCOPY AND DYNAMICS IN H$_2$-H$_2$O COMPLEXES: A COMBINED THEORETICAL AND EXPERIMENTAL STUDY en_US dc.type Article en_US
﻿