10min:
FOURIER TRANSFORM AND INTRACAVITY LASER SPECTROSCOPY OF NICKEL CHLORIDE: IDENTIFICATION OF THE X 2 Pi1/2 STATE.

LEAH OBRIEN, COREY RICE, BARTHEMEAUS OWEN AND TENEIL KELLERMAN, Department of Chemistry, Southern Illinois University, Edwardsville, IL 62026-1652; JAMES OBRIEN AND HONG CAO, Department of Chemistry, University of Missouri, St Louis, MO 63121-4499.

The near infrared electronic transition of NiCl occurring in the region of 11900 cm-1, also known as System I, has been recorded with rotational resolution by Fourier transform emissions spectroscopy and intracavity laser absorption spectroscopy. This band has been identified as the [12.3] 2 Sigma+ - X 2 Pi1/2 transition. The molecular constants for the newly identified X 2 Pi1/2 state are (in cm-1): T0=385.666(2), B0=0.180778(2), D0=1.652(3)x10-7, p=0.8391(1), pD=3.90(7)x10-6. Results of the analysis will be discussed. The identification of the low-lying X 2 Pi1/2 state completes the analyses of low-lying electronic states of NiCl that correlate to the Ni+ 3d9 electron configuration. Progress on using a 5x5 supermultiplet to describe the low-lying states of NiCl will be reported.