Identification of two new electronic states of NiCL using intracavity laser spectroscopy and the correlation between theoretical predictions and experimental observations
Harms, Jack C.
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https://hdl.handle.net/2142/91357
Description
Title
Identification of two new electronic states of NiCL using intracavity laser spectroscopy and the correlation between theoretical predictions and experimental observations
Author(s)
Harms, Jack C.
Contributor(s)
O'Brien, James J.
O'Brien, Leah C.
Han, Shu
Grames, Ethan M.
Issue Date
2016-06-22
Keyword(s)
Small molecules
Abstract
The near-infrared spectrum of NiCl has been recorded in high resolution in the 13,200-13,500 \wn and 13,600-13,750 \wn regions using Intracavity Laser Spectroscopy (ILS). The NiCl Molecules were produced in the plasma discharge of a Ni-lined copper hollow cathode with 0.3-0.6 torr of argon as the sputter gas, and a trace amount of \chem{CCl_4}. The hollow cathode was located within the laser cavity of a Verdi V-10 pumped Ti:sapphire system. A generation of 90 $\mu$sec resulted in an effective pathlength of approximately 700 m for the absorption measurements. Several transitions were observed, including 3 transitions involving 2 previously unreported electronic states. The (0,0) and (1,0) bands of the [13.5] $^{2}$$\Phi$$_{7/2}$-[0.16] A $^{2}$$\Delta$$_{5/2}$ transition were observed near 13,709 \wn and 13,318 \wn, respectively. The (0,0) band of the [13.8] $^{2}$$\Pi$$_{1/2}$ - [0.38] X $^{2}$$\Pi$$_{1/2}$ transition was observed near 13,480 \wn. With the analysis of these transitions, molecular constants have been obtained for 9 of the 12 doublet states of NiCl predicted by Zou and Lou in 2006. Analysis of these transitions and a comparison between the experimentally observed transitions and the theoretically predicted states of NiCl will be presented.
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