Willem Hendrik Keesom
| Willem Hendrik Keesom | |
|---|---|
| Born |
21 June 1876 Texel |
| Died |
24 March 1956 (aged 79) Leiden |
| Nationality | Dutch |
| Fields | physics |
| Doctoral advisor | Johannes Diderik van der Waals |
| Known for | helium |
Willem Hendrik Keesom (/ˈkeɪsoʊm/) (21 June 1876, Texel – 24 March 1956, Leiden) was a Dutch physicist who, in 1926, invented a method to freeze liquid 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 discovered superconductivity (a feat for which Kamerlingh Onnes received the 1913 Nobel Prize in Physics).
He also discovered the lambda-point transition specific-heat maximum between Helium-I and Helium-2 in 1930 (Basic Superfluids p25/Tony Guenault).
In 1924 he became member of the Royal Netherlands Academy of Arts and Sciences.
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