Abstract
Second virial coefficients of two dimensional systems of He3 and He4 are calculated from 0.1K to 60.0K assuming a Lennard-Jones 6–12 interaction. The resultant specific heat is compared with measurements of helium monolayers adsorbed on graphite. The results strongly suggest that the usual peaks in the low-density heat capacity can be attributed solely to two particle interactions.
Research supported in part by the National Science Foundation.
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References
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The 0.027(Å)-2 He3 data is from E. O. McLean, Ph.D. dissertation, University of Washington (1972), unpublished. The rest is from Ref. 1 where they are denoted by coverages x = 0.39 for He3 and 0.255, 0.372 for He4.
The data in Figs. 4 and 5 which are in addition to that shown in Fig. 3 were taken by the University of Washington group.
D. C. Hickernell, E. O. McLean, and O. E. Vilches, Phys. Rev. Lett. 28, 780 (1972).
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Siddon, R.L., Schick, M. (1973). Second Virial Coefficients of Two-Dimensional Systems of He3 and He4 . In: Daunt, J.G., Lerner, E. (eds) Monolayer and Submonolayer Helium Films. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4580-0_6
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DOI: https://doi.org/10.1007/978-1-4613-4580-0_6
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