Journal of Physical Studies 5(2), 126–130 (2001) DOI: https://doi.org/10.30970/jps.05.126 REPRESENTATION OF THE SHORT-RANGE INTERACTIONS IN LIQUID HELIUM VIA MODIFIED HARD SPHERE POTENTIALS I. O. Vakarchuk, A. A. Rovenchak Ivan Franko National University of Lviv, Department for Theoretical Physics 12 Drahomanov Str., Lviv, UA-79005, Ukraine

In this paper we propose five different modifications of the hard sphere potential for the modeling of a short-range repulsion and the calculation of thermodynamic and transport properties of liquid He4. We calculate the potential energy, the total energy, and the sound velocity at $T=0$ K. It is shown that three of the proposed potentials give a satisfactory description of these properties.

PACS number(s): 34.20.Cf, 67.40.Kh, 67.40.Mj

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