Spectroscopic Studies on Astrophysically Interesting TaO TaS, ZrS and SiO+ Molecules

Details Spectroscopic Studies on Astrophysically Interesting TaO TaS, ZrS and SiO+ Molecules Spectroscopic Studies on Astrophysically Interesting TaO TaS, ZrS and SiO+ Molecules

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ap%26ss.281..729r&link_type=abstract

Astrophysics and Space Science, v. 281, Issue 4, p. 729-741 (2002).

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

The true experimental potential energy curves for the electronic ground states of astrophysically important TaO, TaS, ZrS and SiO+ molecules are constructed by using the Rydberg-Klein-Rees method as modified by Vanderslice et al. The ground state dissociation energies are determined by curve fitting techniques using the five parameters Hulburt-Hirschfelder (H-H) function. The estimated dissociation energies are 8.19 +/- 0.17, 6.9 +/-0.14, 5.89 +/- 0.12 and 5.75 +/- 0.12 eV for TaO, TaS, ZrS and SiO+ respectively. These values are in good agreement with the literature values. The r-centriods and Franck-Condon factors (FC Factors) for the bands of K2 φ5/2 - X2 Δ3/2 (K-X) system of TaO, A-X2 Δ (A-X) and B-X2 Δ (B-X) systems of TaS, B1 Π - X1 Σ+ (B-X) system of ZrS and B2 Σ+ - X2 Σ+ (B-X) and A2 Π - X2 Σ+ (A-X) systems of SiO+ molecules have been calculated. The Franck-Condon factors (FC factors) are evaluated by the approximate analytical methods of Jarmain and Fraser. The absence of the bands of these systems is explained.

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