Abstract
The electronic transition 1Σ+–X1Σ+ of scandium monophosphide (ScP) has been observed around 11900cm−1 using laser induced fluorescence spectroscopy. This is the first observation of the ScP spectrum. The spectrum covering ten vibronic bands with v up to 4 was assigned and analyzed. Molecular constants for the vibronic levels involved were obtained by least-squares fitting of the measured line positions. The equilibrium bond length in the upper 1Σ+ state was found to be 2.1590Å, which was slightly shorter than that of 2.1995Å in the X1Σ+ state, in agreement with results from recent calculations.
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