Europhys. Lett., 63 (3) , pp. 340-346 (2003)
Precise measurements of UV atomic lines: Hyperfine structure and isotope shifts in the 398.8 line ofA. Banerjee, U. D. Rapol, D. Das, A. Krishna and V. Natarajan
Department of Physics, Indian Institute of Science - Bangalore 560 012, India firstname.lastname@example.org
(Received 7 January 2003; accepted in final form 5 June 2003)
We demonstrate a technique for frequency measurements of UV transitions with sub-MHz precision. The frequency is measured using a ring-cavity resonator whose length is calibrated against a reference laser locked to the D2 line of . We have used this to measure the 398.8 line of atomic . We report isotope shifts of all the seven stable isotopes, including the rarest isotope . We have been able to resolve the overlapping ( F = 3/2) and transitions for the first time. We also obtain high-precision measurements of the excited-state hyperfine structure in the odd isotopes, and . The measurements resolve several discrepancies among earlier measurements.
32.30.Jc - Visible and ultraviolet spectra.
32.10.Fn - Fine and hyperfine structure.
42.62.Fi - Laser spectroscopy.
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