Description
Title: Spectra of Cu II
Abstract: To improve and expand the description of the spectrum of singly ionized copper, new wavelength measurements in the vacuum ultraviolet (VUV), ultraviolet, and visible spectral regions have been combined with data from the literature (Cu II). We measured 401 lines in the VUV region utilizing a concave grating spectrograph and photographic plates. We used a Fourier-transform spectrometer to measure 276 lines in the UV and visible spectrum. In order to create a comprehensive list of 2440 observed lines, these new measurements were combined with previously unpublished data from Ross’s thesis, accurate VUV grating measurements from Kaufman and Ward, and older, less accurate measurements from Shenstone. From this list, we were able to derive a revised set of 379 optimized energy levels, which we then supplemented with 89 additional levels obtained using series formulas. 29 are brand-new out of the 379 experimental levels. Using newly calculated transition probabilities, the intensities of all lines seen in various experiments have been brought to the same uniform scale (A-values). In order to produce a set of 555 critically assessed transition probabilities with estimated uncertainties, 162 of which are less than 20%, we combined our calculations with previously published measured and calculated A-values.
Keywords: atomic spectra; singly ionized copper; energy levels; wavelengths; Ritz standards;
transition probabilities; critical compilation
Paper Quality: SCOPUS / Web of Science Level Research Paper
Subject: Physics
Subject Category: Atomic and Molecular Physics, and Optics
Writer Experience: 20+ Years
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