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3d–4p Transitions in the zinclike and copperlike ions Y x, xi; Zr xi, xii; Nb xii, xiii; and Mo xiii, xiv

1981; Optica Publishing Group; Volume: 71; Issue: 6 Linguagem: Inglês

10.1364/josa.71.000692

2375-1037

Jean-François Wyart, Joseph Reader, A. G. Ryabtsev,

Atomic and Molecular Physics

Lines occurring as satellites on the long-wavelength side of the 3d10–3d94p resonance lines of Ni-like ions have been investigated with a low-inductance vacuum spark and a 10.7-m spectrograph for the elements Y, Zr, Nb, and Mo. The lines are interpreted as 3d104s–3d94s4p and 3d104p–3d94p2 transitions in the Cu-like ions Y xi, Zr xii, Nb xiii, and Mo xiv and 3d104s2–3d94s24p transitions in the Zn-like ions Y x, Zr xi, Nb xii, and Mo xiii. The spectra of the Cu-like ions were interpreted by generalized least-squares fits for the energy levels of the sequence of four ions. Thirty-nine levels of 3d94s4p were interpreted simultaneously with a root-mean-square deviation of 122 cm−1; forty-four levels of 3d94p2 were interpreted in the same way with a root-mean-square deviation of 200 cm−1. Line identifications and energy levels were obtained for the 3d107p configuration of the Cu-like ions Y xi–Mo xiv.