Scientists from Physikalisch-Technische Bundesanstalt (German national metrology institute) in Braunsweig recently obtained a Bose-Einstein condensate from about 20 000 calcium atoms. This is the first successful attempt to condense alkaline earth species.
Up to now, Bose-condensation was achieved in atomic gases of a number of alkalis (Li, Na, K, Rb, and Cs), and also of ytterbium, chromium, hydrogen, and metastable helium.
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