The rotational spectrum of hydrogen sulfide: The H233S and H232S isotopologues revisited
| Autor: | Cristina Puzzarini, Gabriele Cazzoli |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Hydrogen sulfide Resolution (electron density) Atomic and Molecular Physics and Optics Spectral line chemistry.chemical_compound Nuclear magnetic resonance chemistry Rotational spectrum Millimeter Isotopologue Tensor Physical and Theoretical Chemistry Atomic physics Hyperfine structure Spectroscopy |
| Zdroj: | Journal of Molecular Spectroscopy. 298:31-37 |
| ISSN: | 0022-2852 |
| DOI: | 10.1016/j.jms.2014.02.002 |
| Popis: | The rotational spectra of two isotopic species of hydrogen sulfide have been revisited. For H 2 33 S, which was detected in natural abundance, accurate measurements were performed in the submillimeter-wave region, from 500 GHz up to 1.56 THz, thus allowing improvement of the spectroscopic parameters as well as determination of new high-order centrifugal-distortion constants. The rotational spectrum of the main isotopologue was investigated in the millimeter- and submillimeter-wave region up to 1.6 THz, employing the Lamb-dip technique to obtain sub-Doppler resolution. As a consequence, transition frequencies at 1 THz were retrieved with an accuracy of 1 kHz and the hyperfine structure due to hydrogens was resolved, thus allowing the first determination of the spin–rotation tensor of H in H 2 S. Improved and new spectroscopic parameters were then provided that allow accurate predictions of rotational transitions up to 20 THz; in particular, the newly determined constants permit prediction of rotational transitions with J K a 12 (up to about 10 THz) with expected uncertainties of a few hundreds of kHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect