ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Dispersed fluorescence (DF) and stimulated emission pumping (SEP) experiments have been carried out on the jet-cooled 7Li16O7Li molecule. Rotationally resolved SEP bands to υ2l(l=0,2) vibrational angular momentum levels show that LiOLi is a linear molecule. The DF experiments have resulted in the measurement of 54 (υ1,υ2l,0) levels of the X˜ 1Σg+ ground state, up to 6000 cm−1. The energy levels determined experimentally are amazingly close to those calculated very recently for a high-level ab initio LiOLi(X˜ 1Σg+) potential surface. The DF vibrational level energies are analyzed and discussed in terms of a global fit to an 11-term power series. From the SEP experiments, effective rotational constants Bυ1,υ2l,0 for several of these vibrational levels [including σg+(l=0) and δg(l=2) vibrational angular momentum states for (υ1,υ2l≥2(even),υ3=0) levels] have also been determined. The bond distance R0 is estimated to be 1.611±0.003 Å from an extrapolation of Bυ1,0,0 values. Finally, the unusual "Li+O−2Li+" ionic bonding and the low ω2=112 cm−1 bending frequency for LiOLi(X˜ 1Σg+) are briefly discussed. © 2002 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1491876
Permalink