Analysis of the VUV emission spectrum of the Er~(3+) ion (Er IV)

摘要

This paper reports a summary of results obtained on the spectrum of the Er~(3+) ion (Er IV). The analysis of high resolution VUV emission spectrum led to the identification of about 590 spectral lines in the wavelength region of (851A - 2277A) and the determination of 120 energy levels belonging to the 4f~(11), 4f~(10)5d, 4f~(10)6s and 4f~(10)6p configurations, above the ground level 4f~(11) ~4I_(15/2). Parametric studies of the configurations including configuration interactions provided level compositions in intermediate coupling scheme.