15min:

ROBERT J. LE ROY AND GEOFFREY T. KRAEMER, Guelph-Waterloo Centre for Graduate Work in Chemistry and Biochemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.

Since the detailed theoretical study Levy and Shapiro over a decade ago, incisive new experimental studies have been reported which contradict older measurements of the anisotropy parameters associated with the I*(²P_1/2) dissociation channels, but disagree among themselves regarding the magnitude of the branching ratio between the I(²P_3/2) and I*(²P_1/2) channels.^,~ Previous theoretical studies have also tended to focus on HI, and inconsistently model or overlook apparent discrepancies with the total photodissociation cross-sections for DI. This paper reports our progress on a theoretical re-examination of this system which uses direct least-squares fits to all of the various types of data to attempt to delineate better the underlying potential energy curves and transition moment functions.