Files in this item

FilesDescriptionFormat

application/vnd.openxmlformats-officedocument.presentationml.presentation

application/vnd.openxmlformats-officedocument.presentationml.presentation368101.pptx (1MB)
PresentationMicrosoft PowerPoint 2007

application/pdf

application/pdf1003.pdf (21kB)
AbstractPDF

Description

Title:THZ SPECTROSCOPY OF D2H+
Author(s):Amano, Takayoshi
Contributor(s):Pearson, John; Yu, Shanshan
Subject(s):Astronomy
Abstract:Pure rotational transitions of D$_2$H$^+$ observed by high-resolution spectroscopy have been limited so far to the $J$ = 1$_{10}$-1$_{01}$ transition at 691.7 GHz,footnote{T. Hirao and T. Amano, textit{Ap. J.},textbf{597}, L85 (2003)} $J=2_{20}-2_{11}$ at 1.370 THz, and $J=1_{11}-0_{00}$ at 1.477 THz.footnote{K. M. Evenson et al cited by O. L. Polyansky and A. R. W. McKellar, textit{J. Chem. Phys.}, textbf{92}, 4039 (1990)}footnote{O. Asvany et al, textit{Phys. Rev. Lett.}, textbf{100}, 233004 (2008)} As this ion is a light asymmetric-top molecule, spectroscopic characterization and prediction of other rotational transition frequencies are not straightforward. In this presentation, we extended the measurements up to 2 THz by using the JPL frequency multiplier chains, and observed three new THz lines and re-measured the three known transitions. D$_2$H$^+$ was generated in an extended negative glow discharge cell cooled to liquid nitrogen temperature. Six rotational transition frequencies together with the combination differences derived from three fundamental bands were subject to least square analysis to determine the molecular constants. New THz measurements are definitely useful for better characterization of spectroscopic properties. The improved molecular constants provide better predictions of other unobserved rotational transitions.
Issue Date:25-Jun-15
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:ACS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/79121
Date Available in IDEALS:2016-01-05


This item appears in the following Collection(s)

Item Statistics