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In this paper we continued our research of the uniform electron gas, usingthe single--momentum path integral Monte Carlo method, and studied the momentumdistribution functions and the pair correlation functions in the warm densematter regime. We discovered that the single--particle momentum distributionfunction deviates from the Fermi distribution and forms so-called "quantumtails" at high momenta, if non-ideality is strong enough in both degenerate andnon-degenerate cases. This effect is always followed by the appearance of theshort--range order on the pair distribution functions and can be explained viathe tunneling through the effective potential wells surrounding the electrons.Also we calculated the average kinetic and potential energies in the wide rangeof states, expanding our previous results significantly.

Momentum distribution functions and pair correlation functions of unpolarized uniform electron gas in warm dense matter regime