3 research outputs found
Genetic Algorithm for quick finding of diatomic molecule potential parameters
Application of Genetic Algorithm (GA) for determination of parameters of an
analytical representation of diatomic molecule potential is presented. GA can
be used for finding potential characteristics of an electronic energy state
which can be described by analytical function. GA was tested on two
artificially generated datasets which base on potentials with known
characteristics and two LIF excitation spectra recorded using transitions in
CdKr and CdAr molecules. Tests on generated datasets showed that GA can
properly reproduce parameters of the potentials. Tests on experimental spectra
indicated that changing the potential model from Morse, which is frequently
used as a starting potential in IPA, to expanded Morse oscillator (EMO) leads
to noticeable improvement of agreement between simulated and experimental data
VUV photon induced fluorescence study of SF5CF3
The interaction of SFCF with vacuum-UV radiation has been investigated by photon induced fluorescence spectroscopy. Total fluorescence yield and dispersed fluorescence spectra of SFCF were recorded in the 200-1000 nm fluorescence window. In all cases, the fluorescence spectra resemble those of CFX (X=H, F, Cl, and Br) molecules. At photon energies below 20 eV, the emission is attributed to the excited CF and CF fragments. The threshold for the CF emission is 10.2 ± 0.2 eV, giving an upper-limit estimate for the SF-CF bond dissociation energy of 3.9 ± 0.3 eV. The excitation functions of the CF3 and CF2 emissions were measured in the photon energy range 13.6 – 27.0 eV. The resonant structures observed in SFCF are attributed to electronic transitions from valence to Rydberg orbitals, following similar assignments in CFX molecules. The photoabsorption spectrum of SFCF shows features at the same energies, indicating a strong contribution from Rydberg excitations