Wavelength measurement of the prominent M1 transition in the ground state of Ti-like Pt, Au, and Tl ions

Using a high-efficiency, transmission grating spectrometer at an electron-beam ion trap, the 3s{sup 2}3p{sup 6}3d{sup 4} J=2-3 transition in the ground configuration of the Ti-like ions Pt{sup 56+}, Au{sup 57+}, and Tl{sup 59+} was measured. The measurements achieved up to 20 times better precision than previously reported other high-Z measurements.

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