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09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
The Near-Infrared (3)Phi --> (1)(3)Delta Transition of LaF
1CRAL-Observatoire Astronomique de Lyon, Saint-Genis-Laval Cedex, 69561, France
Journal of Molecular Spectroscopy
|October 18, 2000
Summary
Rotational analyses of the LaF molecule
Area of Science:
- Molecular Spectroscopy
- Quantum Mechanics
- Chemical Physics
Background:
- Lanthanum fluoride (LaF) exhibits complex electronic transitions.
- Understanding molecular interactions is crucial for spectroscopy.
Purpose of the Study:
- To perform detailed rotational analyses of the near-infrared (3)Phi --> (1)(3)Delta system of LaF.
- To investigate perturbations in the electronic states of LaF.
Main Methods:
- Rotational analyses of 32 subbands were conducted.
- A 21x21 matrix representation was used to model interacting levels.
- Perturbations were analyzed using a triplet model of the rovibrational Hamiltonian.
Main Results:
- Spin-uncoupling interactions between specific (1)(3)Delta levels were identified.
- The harmonic oscillator approximation successfully explained the observed perturbations.
- An interaction parameter B(Delta)(0,1) was experimentally determined to be 0.01322(2) cm(-1).
Conclusions:
- The study provides a comprehensive analysis of the LaF (3)Phi --> (1)(3)Delta system.
- The findings contribute to the understanding of molecular interactions and perturbations in electronic spectra.
- Accurate spectral line wavenumbers were determined, with 4500 lines fitted to an rms error of 0.005 cm(-1).
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