Structure factor for a Bose fluid

The structure factor is calculated for a Bose fluid using an expression for S(k), which is approximately valid for all values of k. Marked fluctuations appear for k = 2.15 Å-1, near the roton dip in Ek, and at k = 3.65 Å-1 near the dip in the second branch of Ek. Our calculations are indirectly a theoretical justification for the existence of a second branch in Ek. The results presented here agree fairly well with the experimental values for k >; 3.0 Å-1 along with a dip at k = 3.67 Å-1 which has not been reported earlier. It also suggests the existence of two waves, phonons and rotons, for k >; 3.0 Å-1.