Unfortunately, the stated transition wavelength of 149.7 ± 3.1 nm is well outside the range where practical laser sources exist. There is a proposal for driving

Unfortunately, the stated transition wavelength of 149.7 ± 3.1 nm is well outside the range where practical laser sources exist. There is a proposal for driving the transition with a vacuum ultra-violet frequency comb generated by high harmonic generation [1], but such systems easily fill a lab with no clear path for miniaturization. [1] https://arxiv.org/abs/1905.08060 https://arxiv.org/abs/1905.08060