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Heat Capacity and Thermal Relaxation of Bulk Helium very near the Lambda Point

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DOI: 10.1103/PhysRevLett.76.944
OAI: oai:inspirehep.net:439170
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INSPIRE-HEP
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Abstract

We report new high-resolution measurements of the heat capacity of liquid helium to within 2 nK from the lambda transition, performed with a large sample in earth orbit. The optimum value for the critical exponent characterizing the divergence of the heat capacity below the transition was found to be −0.01285, giving improved support for the renormalization-group theory of phase transitions. Some information on the temperature dependence of the thermal conductivity just above the transition was also obtained.

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