UV light from the ground term of Ti-like ytterbium, tungsten, and bismuth - art. no. 054501

We have used an electron-beam ion trap to measure the wavelength of the J = 2-3 magnetic dipole transition in the 3d(4) ground term of Ti-like ytterbi um, tungsten, and bismuth. This fills in a gap in previous measurements alo ng this isoelectronic sequence, as well as extending previous work to the h ighest Z yet. With the addition of our results, measurements of this line n ow cover a sufficient range of Z to allow an interpolation of reliable wave length estimates for the unmeasured members of the isoelectronic sequence f rom Z = 52 to 83. We provide a table of these wavelengths for each member o f the sequence in this range, and compare the measured wavelengths to recen t calculations. Our results show that a long-standing discrepancy between p rediction and experiment disappears in the high-Z limit.