A LASER-INDUCED FLUORESCENCE STUDY OF THE BIF AO-]X1O+ SYSTEM IN THE REGION 6550 TO 7400 ANGSTROM - ROTATIONAL ANALYSIS AND EVIDENCE FOR ANAO+ STATE POTENTIAL MAXIMUM()
Md. Oberlander et Jm. Parson, A LASER-INDUCED FLUORESCENCE STUDY OF THE BIF AO-]X1O+ SYSTEM IN THE REGION 6550 TO 7400 ANGSTROM - ROTATIONAL ANALYSIS AND EVIDENCE FOR ANAO+ STATE POTENTIAL MAXIMUM(), The Journal of chemical physics, 99(4), 1993, pp. 2365-2376
Eighteen previously unobserved bands belonging to the BiF A O+-->X1Osystem have been identified in the region between 6550 and 7400 angstr
om. Nine bands representing v'=27-29 and v''=40-45 have been rotationa
lly analyzed, and the v'=27 and v'=29 states exhibit strong homogeneou
s perturbations. These upper state levels are also observed to prediss
ociate, providing evidence for an A O+ state potential maximum which h
as been theoretically predicted. A limiting curve of dissociation sugg
ests a rotationless potential maximum at 32 674+/-822 cm-1. This energ
y must correspond to a potential maximum if it is to be reconciled wit
h recent thermochemical measurements of the ground state dissociation
energy, D0(0) = 3.76+/-0.13 eV. The new spectroscopic constants have b
een included in a calculation of Rydberg-Klein-Rees potential curves f
or both states. Franck-Condon factors calculated from these potentials
are qualitatively consistent with the observed intensity distribution
. Measured collision free radiative lifetimes are consistent with know
n A O+ state lifetimes for nonpredissociated states and are found to b
e shorter for predissociated states.