6533b834fe1ef96bd129d537
RESEARCH PRODUCT
A mass-independent expanded Dunham analysis of aluminum monoxide and aluminum monosulfide
Jürgen GaussBjörn WaßmuthGuido W. FuchsThomas BüchlingThomas F. GiesenAlexander A. Breiersubject
Jet (fluid)Laser ablationMaterials science010304 chemical physicsSpectrometerMonoxide010402 general chemistry01 natural sciencesAtomic and Molecular Physics and Optics0104 chemical sciencesExcited state0103 physical sciencesSupersonic speedIsotopologuePhysical and Theoretical ChemistryAtomic physicsGround stateSpectroscopydescription
Abstract Pure rotational transitions of 27Al16O, 27Al18O, 27Al32S, and 27Al34S are recorded in the vibrational ground state and singly excited vibrational state using a mm-wavelength supersonic jet spectrometer in combination with a laser ablation source. In total 275 rotational transitions have been assigned. For the first time, mass-independent expanded Dunham analyses are performed using isotopologues of aluminum monoxide and aluminum monosulfide. The breakdown of the Born-Oppenheimer approximation is observed. Based on these mass-independent analyses, frequency positions of pure rotational transitions of the rare radioactive isotopologues 26AlO and 26AlS are predicted with uncertainties at the sub-MHz level. These data will allow to search for 26Al-species in astrophysical environments using submm-observation facilities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-01 | Journal of Molecular Spectroscopy |