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High resolution infrared emission spectra have been measured for AuH and AuD and for two isotopomers of each of CuH, CuD, AgH, and AgD. The molecules were made in a carbon tube furnace (King furnace), and in spite of intense background thermal emission from the furnace (at >2000 °C), vibration–rotation emission data could be recorded. Together with high resolution measurements taken from the literature, the data for each species were treated using two types of combined-isotopomer analysis: One based on fits to empirical molecular parameters, and the other based on direct fits to the underlying potential energy functions, both of which take account of mass-dependent Born–Oppenheimer breakdown correction terms. Accurate isotopically related Dunham parameters and Born–Oppenheimer breakdown parameters are obtained for each species, as well as accurate analytic potential functions and adiabatic and nonadiabatic radial correction functions.

The 000B 2B1–X 2A1 band of CaNH2 has been recorded at high resolution with a laser ablation molecular beam spectrometer. This B 2B1 state is the last of the low-lying electronic states of CaNH2 to be characterized. The pure precession model, which has previously been used to describe the spin-rotation interactions in this family of molecules was used to interpret and correctly assign the spectrum. The detailed analysis of the high resolution spectrum and energy level structure of the B 2B1 state is presented.

The high resolution spectrum of the 000 vibronic band of the C 2A1–X 2A1 transition of CaNH2 was recorded with a laser ablation/supersonic molecular beam spectrometer. Approximately 140 lines of the Ka′=0←Ka″=0 and the Ka′=1←Ka″=1 sub–bands were measured and combined with the previous A 2B2–X 2A1 and B 2B1–X 2A1 results. A global fit of the data was carried out and the effective spectroscopic constants for the X, A, B, C states are reported. A complete set of spin–rotation constants (eαα’s) are now available for the A 2B2, B 2B1 and C 2A1 states. The unpaired electron in these three excited states can be considered to be located in three p–orbitals (px,py,pz) centered on the metal atom. The simple pure precession model provides estimates for the 9 spin–rotation parameters in the A, B, and C states.