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The momentum or transverse momentum spectra of antiprotons produced atmid-rapidity in proton-helium ($p$+He), gold-gold (Au+Au), deuton-gold($d$+Au), and lead-lead (Pb+Pb) collisions over an energy range from a few GeVto a few TeV are analyzed by the Erlang distribution, the inverse power-law(the Hagedorn function), and the blast-wave fit, or the superposition oftwo-component step function. The excitation functions of parameters such as themean transverse momentum, initial state temperature, kinetic freeze-outtemperature, and transverse flow velocity increase (slightly) from a few GeV toa few TeV and from peripheral to central collisions. At high energy and incentral collisions, large collision energy is deposited in the system, whichresults in high degrees of excitation and expansion.

Initial and final state temperatures of antiproton emission sources in high energy collisions