Statistical and Low Temperature Physics - University of Liverpool
Statistical and Low Temperature Physics - University of Liverpool
Statistical and Low Temperature Physics - University of Liverpool
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Superfluid transition<br />
There is a very sudden increase in the specific heat <strong>of</strong> helium-4<br />
near 2.2 K. This is due to a phase transition. Below 2.2 K,<br />
helium-4 changes to a superfluid with zero viscosity.<br />
Pobell (2007)<br />
Because <strong>of</strong> the shape <strong>of</strong> the graph, this temperature is called<br />
the lambda (λ) point.<br />
Helium-3 liquid can also change to a superfluid, but at the<br />
much lower temperature <strong>of</strong> 2.5 mK.<br />
<strong>Statistical</strong> <strong>Physics</strong> 25 Oct - Dec 2009
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