Reactivities of neutronic and aneutronic fusion fuels

Fusion reactivities (〈σv〉) of some neutronic and aneutronic fusion fuels are evaluated numerically using cross-section data available from IAEA site. Comparison of new reactivities with the fitting formula published in earlier works shows that these fits are accurate only in certain temperature ranges. Here, new polynomial fits for fusion reactivities are proposed. Agreement of the new fittings with numerical values of 〈σv〉 is found to be quite good.