The near-infrared spectrum of NiCl: Analysis of vibrational components of system G and system H between 12,500 cm−1 and 13,750 cm−1

Abstract

The near-infrared spectrum of nickel chloride, NiCl, has been recorded at high resolution from 12,400–12,600cm−1, 13,200–13,500cm−1, and 13,600–13,750cm−1 using intracavity laser absorption spectroscopy, ILS. The NiCl molecules were produced in the plasma discharge of a nickel-lined, copper hollow cathode with ∼1.8torr of Ar as the sputter gas and a trace amount of CCl4 as the chloride source. Several transitions were observed and analyzed, including the (2,0), (1,0), and (0,1) bands of the [13.0] 2Π3/2–X2Π3/2 transition, System G, and the (1,0) band of the [12.3] 2Σ−–X2Π3/2 transition, System H. The transitions were analyzed using PGOPHER and obtained molecular parameters are reported. A potential energy curve for the [13.0] 2Π3/2 state has been constructed using the vibrational information from the analyzed transitions.