A(2)SIGMA(+)-X(2)PI BANDS OF (OD)-O-18

The emission spectrum of the A(2) Sigma(+)-X(2) Pi (0, 0), (1, 0), and (1, 1) bands of (OD)-O-18 has been investigated with a 6.65-m vacuum spectrograph in the wavelength region 290 to 350 nm. The emission spec trum of (OD)-O-18 was produced by microwave discharge of (D2O)-O-18 va por. All 12 branches expected from a (2) Sigma-(2) Pi transition have been observed and assigned. A merged least-squares fit of the measured line positions yielded molecular parameters of the v = 0 and 1 levels of both A(2) Sigma(+) and X(2) Pi states. Excellent agreement has bee n obtained between determined molecular parameters and those calculate d from isotopic relationships. (C) 1996 Academic Press, Inc.