Isotopic shift measurements of the (3)S(3sns)-(3)P(3s3p) transitions of Mg I.
We have measured the isotopic shifts of the (3)S(3s6s)-(3)P(3s3p) and (3)S(3s7s)-(3)P(3s3p) transitions of Mg I and the values of the hyperfine-structure constant A((3)S(1)) for the 3s6s and 3s7s terms of (25)Mg. The absolute wavelengths have been measured at an accuracy level of +/-3 x 10(-7), mainly limited by the Doppler broadening of the I(2) 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.
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Novero
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Godone