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Title:VIBRATIONAL SPECTROSCOPY OF He-O2H+ AND O2H+
Author(s):Asvany, Oskar
Contributor(s):Schlemmer, Stephan; Jusko, Pavol; Yamada, Koichi MT; Kohguchi, Hiroshi
Subject(s):Astronomy
Abstract:The elusive protonated oxygen, O$_2$H$^+$, has been characterized _x000d_ by vibrational action spectroscopy in a cryogenic 22-pole ion trap. On the one hand, the vibrational bands of the tagged He--O$_2$H$^+$ have been investigated, using a table-top OPO system for the known OH-stretch$^a$, whereas the FELIX$^b$ light source has been used to detect the hitherto unknown low-frequency O-O-H bend and O-O stretch._x000d_ On the other hand, the untagged O$_2$H$^+$ has been detected _x000d_ for the first time by high-resolution rovibrational spectroscopy_x000d_ via its $nu_1$ OH-stretch motion._x000d_ 38 ro-vibrational fine structure transitions with partly resolved hyperfine satellites were measured (56 resolved lines in total). _x000d_ Spectroscopic parameters were determined by a fit to an asymmetric rotor model with a $^3A''$ electronic ground state. _x000d_ The band center is at 3016.73~wn, which is in good _x000d_ agreement with experimental$^a$ and {it ab initio}$^{c,d}$ predictions. Based on the spectroscopic parameters, the rotational spectrum is predicted, but not detected yet. \_x000d_ _x000d_ noindent_x000d_ $^a$ S. A. Nizkorodov et al., Chem. Phys. Lett., 278, 26, 1997 \_x000d_ $^b$ D. Oepts et al., Infrared Phys. Technol., 36, 297, 1995 \_x000d_ $^c$ S. L. W. Weaver et al., Astrophys. J., 697, 601, 2009 \_x000d_ $^d$ X. Huang and T. J. Lee, J. Chem. Phys., 129, 044312, 2008 \_x000d_ _x000d_
Issue Date:6/20/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/97148
DOI:10.15278/isms.2017.TA09
Date Available in IDEALS:2017-07-27


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