ABSTRACT
The method for reconstruction of an adiabatic potential energy curve from experimental dispersed fluorescence spectra has been developed. The novelty of the method relies on a unique approach of simultaneous use of [Formula: see text] and [Formula: see text] parts of the spectrum. The method is based on the Genetic Algorithm (GA) procedure and determines potential energy curve integrally, below and above the dissociation energy limit. The method was tested on the artificially generated reference spectrum as well as experimental spectrum of [Formula: see text] transition in Hg[Formula: see text]. The tests show very good accuracy of simulation based on GA results with artificially generated reference spectrum as well as with the experimental one.
ABSTRACT
Spectroscopic rotational characterization of two υ'=0 and υ'=1 vibrational components of the E3Σ1+(5s6s3S1) Rydberg state of CdNe van der Waals (vdW) complex has been performed using specially designed approach. In optical-optical double resonance (OODR) process, a selective J-excitation has been realized using the [Formula: see text] 3P1) transition, with υâ³=0 level of the [Formula: see text] state as an intermediate in the excitation from υ=0 of the [Formula: see text] 1S0) state. As a result, Bυ=0' and Bυ=1' rotational constants have been determined as well as the Re' equilibrium internuclear separation in the E3Σ1+ - state potential well.
ABSTRACT
We report on the observation of a gerade Rydberg electronic energy state of Cd2 van der Waals (vdW) complex vibrationally cooled in a free-jet expansion beam. Cd2 in the beam were excited from the X10g+(51S0) ground via the b30u+(53P1) intermediate to the final gerade state using optical-optical double resonance (OODR) method. A pronounced vibrational progression with partly resolved isotopologue components was recorded and analyzed. The analysis of isotopic separation indicated the excitation to high vibrational levels (υ'≈50). A comparison with the result of ab initio calculations reveals, that Cd2 was most probably excited to the 31g -state correlating with the 63S1 atomic asymptote.
ABSTRACT
The interaction of SF(5)CF(3) with vacuum-UV radiation has been investigated by photon induced fluorescence spectroscopy. Total fluorescence yield and dispersed fluorescence spectra of SF(5)CF(3) were recorded in the 200-1000 nm fluorescence window. In all cases, the fluorescence spectra resemble those of CF(3)X (X = H, F, Cl, and Br) molecules. At photon energies below 20 eV, the emission is attributed to the excited CF(3) and CF(2) fragments. The threshold for the CF(3) emission is 10.2 +/- 0.2 eV, giving an upper limit estimate for the SF(5)-CF(3) bond dissociation energy of 3.9 +/- 0.3 eV. The excitation functions of the CF(3) and CF(2) emissions were measured in the photon energy range 13.6-27.0 eV. The resonant structures observed in SF(5)CF(3) are attributed to electronic transitions from valence to Rydberg orbitals, following similar assignments in CF(3)X molecules. The photoabsorption spectrum of SF(5)CF(3) shows features at the same energies, indicating a strong contribution from Rydberg excitations.
