Abstract
We have measured the isotopic shifts of the 3S(3s6s)–3P(3s3p) and 3S(3s7s)–3P(3s3p) transitions of Mg i and the values of the hyperfine-structure constant A(3S1) for the 3s6s and 3s7s terms of 25Mg. The absolute wavelengths have been measured at an accuracy level of ±3 × 10−7, mainly limited by the Doppler broadening of the I2 transitions used as a reference and by the precision of the knowledge of the related wavelengths. The measurements have been performed in an atomic beam rich in metastable atoms by scanning a ring dye laser and observing simultaneously the fluorescence of the beam.
© 1991 Optical Society of America
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