			15min:

PROBING THE ELECTRONIC STRUCTURE OF THE NICKEL MONOHALIDES: SPECTROSCOPY OF THE LOW-LYING ELECTRONIC STATES OF NiX (X=Cl,Br,I).

LLOYD MUZANGWA, VICTORIA AYLES, SILVER NYAMBO AND SCOTT A. REID, Department of Chemistry, Marquette University, Milwaukee, WI 53233.

Laser induced fluorescence and single vibronic level emission spectroscopy has been used to probe five low-lying electronic states (X² _3/2, A² Delta _5/2, X² _1/2, A² Delta _3/2 and B² Sigma ⁺_1/2) of NiX (X=Cl,Br,I) that arise from the 3d⁹ configuration of Ni⁺. In this work, term energies and a complete set of vibrational parameters were derived for all five electronic states of the target molecules, and these are compared with recent high level ab initio calculations. Pertubations among these states were examined, and the data set derived in this work affords a detailed analysis of periodic trends in the Nickel monohalide series.