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Observation of crossover from ballistic to diffusion regime for excimer molecules in superfluid 4He

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>05/2013
<mark>Journal</mark>Journal of Low Temperature Physics
Number of pages7
Early online date14/09/12
<mark>Original language</mark>English


We have measured the temperature dependence of the time of flight of helium excimer molecules He2 (a3 Σ + u ) in superfluid 4He and find that the molecules behave ballistically below ∼100 mK and exhibit Brownian motion above ∼200 mK. In the intermediate temperature range the transport cannot be described by either of the models.

Bibliographic note

The final publication is available at Springer via http://dx.doi.org/10.1007/s10909-012-0720-6