The laser-induced fluorescence spectroscopy of gold monoxide: B²Σ⁻－X²Π_3/2 transition

Abstract

The electronic spectrum of the gaseous gold monoxide molecule has been investigated in the range of 16000－18500 cm⁻¹ using laser induced fluorescence spectroscopy and single vibronic level emission spectra. Five rotationally resolved vibronic bands are observed and assigned to the transitions B²Σ⁻ (v' = 0－4) －X²п_3/2 (v'' = 0), in which the 0－0 transition is observed for the first time. The molecular constants of the excited state B²Σ⁻ are obtained by a rotational analysis of the spectra. The spin-orbit coupling constant and the vibrational constants of the ground state X²п_i are determined with the accuracy improved by one order of magnitude. The lifetimes of most observed bands are also measured for the first time.

Keywords:

• AuO
• electronic spectrum
• laser-induced fluorescence (LIF)

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 11274316, 21203216), Shaanxi Provincial Education Department (Program No.16JK1824) and Talent Introduction Project of Xianyang Normal University (Program No.07XSYK289).