Volume 63, Number 3, August 2003
|Page(s)||340 - 346|
|Section||Atomic and molecular Physics|
|Published online||01 November 2003|
Precise measurements of UV atomic lines: Hyperfine structure and isotope shifts in the 398.8 line of
Department of Physics, Indian Institute of Science - Bangalore 560 012, India
Corresponding author: email@example.com
Accepted: 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 () 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.
PACS: 32.30.Jc – Visible and ultraviolet spectra / 32.10.Fn – Fine and hyperfine structure / 42.62.Fi – Laser spectroscopy
© EDP Sciences, 2003
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