The specific heat of confined helium near the lambda point

Heat capacity measurements of the liquid helium lambda transition in confined geometries have long been in disagreement with scaling theories of second order phase transitions. The authors present measurements of a 19 micron film which extend the results of Chen and Gasparini (CG) to near macroscopic size. They find that the new data as well as most of the CG data are in reasonable agreement with recent renormalization group theory calculations