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Measurement of the Landau velocity in He II.

Research output: Contribution to journalJournal article


Journal publication date18/08/1980
JournalPhysics Letters A
Journal number4
Number of pages3
Original languageEnglish


We report the preliminary results of an experiment to measure the Landau critical velocity in He II. Our measurements, for pressures P in the range 19 < P < 25 bar, agree to better than 1% with values of vL calculated from accepted values of the Landau parameters, but lie systematically above them.