Abstract
An ultrasensitive laser spectroscopic method has been developed to perform hyperfine spectroscopy of heavy-ion-induced reaction products. It is based on resonance ionization in a buffer gas cell combined with radioactive decay detection. The feasibility has been demonstrated using the β-active Tl. A sensitivity of 1.3× of the two-step resonance-ionization process via the n=17 Rydberg level has been determined, utilizing a pulsed excimer-dye-laser combination. The previously unknown nuclear magnetic moment μTl) = 0.292(13) ( is the nuclear magneton) and a rms radius difference between and of δ〈〉=0.099(15) were deduced from the 6p –7s transition.
- Received 7 October 1991
DOI:https://doi.org/10.1103/PhysRevLett.68.1675
©1992 American Physical Society