Photoelectron Velocity Map Imaging Spectroscopy of the Beryllium Sulfide Anion, BeS.

Slow electron velocity map imaging (SEVI) spectroscopy was used to examine the BeS anion to neutral ground-state transition, X Σ → X Σ. Rotational constants, vibrational intervals, and the electron binding energy of BeS were determined. Partially resolved rotational contours were seen due to the relatively small moment of inertia of beryllium sulfide.

Photodetachment spectroscopy of the beryllium oxide anion, BeO.

The XΣ→XΣ anion to neutral ground state photodetachment of BeO has been studied by means of photoelectron velocity-map imaging spectroscopy in a newly constructed apparatus. Vibrational intervals, rotational constants, and the electron detachment threshold of BeO were determined for the first time. The small moment of inertia of beryllium oxide allowed for the observation of partially resolved rotational contours.

Autodetachment spectroscopy of the aluminum oxide anion dipole bound state.

The (1)Σ(+)←X(1)Σ(+) ground state to dipole bound state (DBS) electronic transition of AlO(-) has been studied by means of autodetachment spectroscopy. Vibrational and rotational molecular constants for AlO(-) have been determined for both the ground state (υ″ = 0, 1) and the excited DBS (υ' = 0, 1). These data provide an improved determination of the electron affinity for AlO (2.

Experimental and theoretical characterization of the 2(2)A'-1(2)A' transition of BeOH/D.

The hydroxides of Ca, Sr, and Ba are known to be linear molecules, while MgOH is quasilinear. High-level ab initio calculations for BeOH predict a bent equilibrium structure with a bond angle of 140.9°, indicating a significant contribution of covalency to the bonding.