Abstract
The photon-burst technique has been used to perform laser spectroscopy on small samples of accelerator-produced radioactive isotopes. Measurements have been made of the isotope shifts in the resonance transitions of 128Ba (τ1/2 = 2.4 days), 126Ba (τ1/2 = 100 min), and 82Sr (τ1/2 = 24 days). The technique has permitted high-resolution measurements to be performed in a few minutes on atomic beams of ~100 atoms/sec of these elements. The laser-spectroscopy measurements of 126Ba are, to our knowledge, on the smallest samples of radioactive atoms (~109 atoms) used for high-resolution isotope-shift measurements performed to date. A technique is also demonstrated that, by producing a laser beam of spatially varying polarization, reduces optical pumping effects, allowing the photon-burst technique to be extended for use with odd isotopes as well as even.
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