TEMPERATURE-DEPENDENCE OF MOLECULAR KINETIC-ENERGY IN DENSE FLUID PARAHYDROGEN

We present an experimental and path integral Monte Carlo study of the single-molecule dynamics in fluid parahydrogen. The experiment consist s in an inelastic neutron scattering determination of the translationa l kinetic energy, [E(k)], as a function of temperature at a density cl ose to the triple point. Experimental and simulated values of [E(k)] a re found to be in good agreement in the investigated temperature range . Discrepancies are found with a simple harmonic model parametrized by the value of the zero-point kinetic energy.