Pulsed-nozzle Fourier-transform microwave spectroscopy of laser-vaporized metal oxides: Rotational spectra and electric dipole moments of YO, LaO, ZrO, and HfO
- Molecular Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (USA)
The rotational spectra of YO, LaO, ZrO, and HfO have been measured using a Fourier-transform microwave spectrometer in combination with a laser-ablation source. Here, a {ital Q}-switched Nd:YAG laser (532 nm) was used to vaporize the metal oxides from a target source rod located in the throat of a pulsed-molecular-beam valve. A description of the instrument is given. The electric dipole moments of the four species have been measured and compared to {ital ab} {ital initio} results, where available. The experimental values are {mu}{sub YO} =4.524(7), {mu}{sub LaO} =3.207(11), {mu}{sub ZrO} =2.551(11), and {mu}{sub HfO} =3.431(5) D. Of special note are the extremely large nuclear quadrupole coupling constants, eQq, determined for the {sup 177}HfO and {sup 179}HfO isotopic species, with values of {minus}5952.649(35) MHz and {minus}6726.981(39) MHz, respectively. This is the first determination of nuclear quadrupole coupling constants for a molecule containing the Hf atom.
- OSTI ID:
- 6837279
- Journal Information:
- Journal of Chemical Physics; (USA), Vol. 92:8; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HAFNIUM OXIDES
ELECTRIC DIPOLE MOMENTS
MICROWAVE SPECTRA
LANTHANUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES
ABLATION
COUPLING CONSTANTS
EVAPORATION
EXPERIMENTAL DATA
HAFNIUM 177
HAFNIUM 179
LASER RADIATION
QUADRUPOLE MOMENTS
ROTATIONAL STATES
CHALCOGENIDES
DATA
DIPOLE MOMENTS
ELECTRIC MOMENTS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
EVEN-ODD NUCLEI
EXCITED STATES
HAFNIUM COMPOUNDS
HAFNIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LANTHANUM COMPOUNDS
NUCLEI
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RADIATIONS
RADIOISOTOPES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SECONDS LIVING RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties