THE D(3)PHI-]A(3)DELTA AND B(3)PI-]A(3)DELTA (0-0) TRANSITIONS OF SCF

We present a rotational analysis of the (0-0) bands of the visible d(3) Phi -->, a(3) Delta and infrared b(3) Pi --> a(3) Delta systems of scandium monofluoride which appear in the thermal emission. The wavenumbers of 1240 lines observed in the Delta Sigma = 0 subbands of the two systems are the subject of a global adjustment in which the electronic states involved are represented by adapted Hamiltonian matrices. Accurate rotational constants and energies at upsilon = 0 are obtained for the three states. Reliable values of the spin-orbit splittings could also be determined from the fits in spite of the nonobservation of satellite subbands with Delta Sigma = +/-1. The three substates of b(3) Pi all show significant Lambda-type doubling and the e/f parity of the components could be determined. (C) 1995 Academic Press Inc.