Role of three particle interactions in the determination of static pair correlation functions

Abstract

The Static Pair correlation functions in gaseous mercury samples at temperatures 1623 K and 1723 K have been computed using (n,6) form of inter-particle interaction potential present among Hg atoms. Static Pair correlation function g(r) exhibits a straightforward relation to the strength of inter-particle interaction. These Structural functions can describe the state of order of any condensed matter. At low and intermediate densities, contribution towards interaction from a third particle beyond that present among a pair of particles, plays a dominant role. Computed results for g(r) function while incorporating three particle interactions at densities 2.1 g/cm3 (1623 K) and 3.0 g/cm3 (1723 K) have been reported and compared with the experimental results as well as with those obtained from two body interactions. An excellent agreement between computed and experimental results is clearly evident. Moreover, this can also be clearly observed that interplay of three particle interactions provides much better results as compared to that from two particle interactions.