THEORY OF SUPERFLUIDITY IN HELIUM- A REVIEW

In nature the inert gas helium exists in two forms, isotopes, with fundamentally different properties. The study of superfluidity and its effect on the property of helium liquid is considered to be principle interest of the researcher from the last century. In this paper a brief account of the property of helium isotopes and the physics involve in the superfluidity of 3He and 4He are being discussed. Also listed in this paper are different methods suggested and work done by various research groups to explain superfluidity and its related property in liquid helium

SURFACE PROPERTIES OF LIQUID 3He AT ZERO PRESSURE

Surface properties of quantum liquids have constituted a field for numerous interesting investigations, both experimental and theoretical. In this paper we study contribution of various nearest neighbours in simple cubic arrangement of the liquid helium toward the surface tension (σ) of liquid 3He. To this effect we use standard inter-atomic potential (Lennard Jones potential). We note that the major part of the contribution comes from its first four nearest neighbours. The agreement between our theoretical results with experimental values is satisfactory