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u+ AND THE IONIZATION ENERGY OF Be2.
I. O. ANTONOV, B. J. BARKER, V. E. BONDYBEY, M. C. HEAVEN, Department of Chemistry, Emory University, Atlanta, GA 30322.
Rotationally resolved spectra for Be2+ were recorded with PFI-ZEKE technique. Vibrational levels v+=0-6 were observed. The symmetry of the ground state was determined as 2
u+. The bond energy was found to be De+ = 16348(5) cm-1 and the equilibrium distance Re+ = 2.211(8) Å. The ionization energy for Be2 was refined at 59824(2) cm-1. Comparisons with high-level theoretical calculations indicate that the bonding in Be2+ is adequately described by MRDCI calculations with moderately large basis sets.