Das Vorzeichen der Hyperfeinstruktur-Aufspaltung des 3d 5 4s 2 6 S 5/2-Grundzustandes des Mn55

Using a double Fabry-Perot interferometer and an atomic-beam light source, the sign of the hyperfine-structure splitting of the 3d 5 4s 2 6 S 5/2 ground state of Mn55 has been determined to be negative. The absolute value of the splitting previously has been measured byWoodgate andMartin.