Two-photon laser spectroscopy at 296.76 nm could interrogate the 229Th nuclear clock transition in Th2+ at 10-100 kW/cm2, if assumed gigahertz-scale hyperfine mixing and a 10 s isomer lifetime hold.
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Optical clock based on two-photon spectroscopy of the nuclear transition in ion $^{229}$Th in a monochromatic field
Two-photon laser spectroscopy at 296.76 nm could interrogate the 229Th nuclear clock transition in Th2+ at 10-100 kW/cm2, if assumed gigahertz-scale hyperfine mixing and a 10 s isomer lifetime hold.