John F. Allen (physicist)
- John F. Allen (physicist)
Infobox Scientist
name = John "Jack" Frank Allen
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caption = John "Jack" Frank Allen
birth_date = May 5, 1908
birth_place = Winnipeg,
death_date = April 22, 2001
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nationality = England
ethnicity =
field = physics
work_institutions = St Andrews University
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doctoral_students =
known_for = superfluid phase of matter
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John "Jack" Frank Allen (May 5, 1908 – April 22, 2001) was a Canadian-born physicist. Along with Pyotr Leonidovich Kapitsa and Don Misener, Allen discovered the superfluid phase of matter in 1937 using liquid helium in the Royal Society Mond Laboratory in Cambridge, England. He was elected as a fellow of the Royal Society in 1949.
Born in Winnipeg, he was also known as Jack Allen. Allen was professor of physics at St Andrews University, Scotland from 1947 to 1978, and then emeritus professor until his death. Allen also used a movie camera to film his experiments, such as the superfluid helium fountain. His was an early use of moving images to documents experiments and inform students and the general public. This is a trend that has been maintained by his relative Richard D. Allen (filmmaker)
ee also
*Timeline of low-temperature technology
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