Fig. 1
From: Blackbody radiation shift assessment for a lutetium ion clock
Energy level structure of Lu+. a Low-lying energy levels showing the 804 and 848 nm clock transitions, 646 nm detection transition, and the 350 and 622 nm optical pumping transitions. b Hyperfine and magnetic substates for the clock transitions interrogated in this work, including the F = 7 to F = 6 microwave transition
