Rovibronic spectrum of PbS in 19520-22900 cm-1

作者：Chen, Yini; Chen, Ben; Yin, Jinping; Wang, Hailing^*

来源：CHINESE JOURNAL OF CHEMICAL PHYSICS, 2023, 36(1): 35-40.

DOI：10.1063/1674-0068/cjcp2201008

• Rovibronic spectrum
• Molecular constant
• Potential energy curve
• Mixing state

The rovibronic spectrum of PbS in the range of 19520-22900 cm(-1) are investigated using the laser ablation-laser induced fluorescence method. The spectra in this range are assigned as the transitions of A-X and B-X according to the spectral analyzation. The upper electronic state of the transition in the range of 19520-22900 cm(-1) is analyzed and discussed, and it is concluded that the upper state, A, is a mixture of (3)p(0)+ and S-3(0+)- states, the (3)p(0+) state is in domination. The spectrum in the range of 22025-22900 cm(-1) is assigned as the B(3)p(1)-(XS+)-S-1 transition. The molecular constants of these two transitions are derived from the observed spectra. The Frank-Condon factors (FCFs) of these two transitions are also calculated using the RKR/LEVEL method. All the results are compared with the reported theoretical and experimental results, showing that the A state is a mixing state which is in consistent with Balasubramanian's relativistic configuration interaction calculation result. And our calculated FCFs are in agreement with our recorded spectra.