Laser-induced fluorescence spectroscopy of the B⁵Π_-1 – X⁵Π_-1 system of the chromium monosulfide molecule

Abstract

Laser induced fluorescence and dispersed fluorescence spectroscopy was used to investigate the B ⁵Π_-1 – X ⁵Π_-1 system of the chromium monosulfide molecule. The rotational constant and Λ-doubling parameter of B ⁵Π_-1 (v′ = 7), as a newly observed upper vibrational level, were obtained from the rotationally resolved laser excitation spectrum. For the ground X ⁵Π_-1 state, the vibrational frequency and vibrational anharmonicity constant were experimentally determined for the first time from the dispersed fluorescence spectrum. In addition, the lifetimes of the upper B ⁵Π_-1 (v′ = 0 − 7) levels were measured by fitting the time-dependent fluorescence decay.

Keywords:

• CrS
• emission spectra
• LIF
• rotational constant
• vibrational frequency

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is supported by National Key R&D Program of China [Grant No. 2017YFA0402300], Strategic Priority Research Program of the Chinese Academy of Sciences [Grant No. XDB21030900], and National Natural Science Foundation of China [Grant Nos. 12027809, U1832175].