Dissociation energies of astrophysically important MgO, SO, SiN and TiO from spectroscopic data

The potential energy curves for the electronic ground states of astrophysic ally important MgO, SO, SIN and TiO molecules are constructed by the RKRV m ethod. The dissociation energies are determined by curve-fitting techniques using the five parameters Hulburt-Hirschfelder function. The estimated dis sociation energies are 3.674 +/- 0.075, 5.321 +/- 0.113, 4.492 +/- 0.103 an d 6.94 +/- 0.16 eV and MgO, SO, SiN and TiO, respectively. The estimated D- 0 values are in reasonably good agreement with literature values. (C) 2000 Elsevier Science Ltd. All rights reserved.