Willem Hendrik Keesom

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Willem Hendrik Keesom (1876 – 1956) was a Dutch physicist who, in 1926, invented a method to solidify helium. He also developed the first mathematical description of dipole-dipole interactions in 1921. Thus, dipole-dipole interactions are also known as Keesom interactions. He was previously a student of Heike Kamerlingh Onnes, who had been the first to liquify helium (a feat for which Kamerlingh Onnes received a Nobel Prize).

[edit] External links

• Albert van Helden, Willem Hendrik Keesom 1876 – 1956, In: K. van Berkel, A. van Helden and L. Palm ed., A History of Science in the Netherlands. Survey, Themes and Reference (Leiden: Brill, 1999) 498-500.
• Scientists of the Dutch School: Willem Hendrik Keesom @ Royal Netherlands Academy of Arts and Sciences.
• P.H. van Laer, Keesom, Wilhelmus Hendrikus (1876-1956), in Biografisch Woordenboek van Nederland.