Charge exchange in slow H+ + D(1s) collisions

We present the elastic and charge exchange cross sections for slow (meV) H+ + D(1s) collisions based upon a recently formulated adiabatic representation. This representation avoids many of the usual `translational factor' issues, and those that remain have no significant effect for scattering in the n = 1 manifold. The cross sections are converged at the 1% level. The various Feshbach and shape resonances that form in the isotopic gap and in the charge transfer region are identified and compared with previous work. An exact analytical expression for the ratio of H+ + D(1s) and D+ + H(1s) charge exchange cross sections suitable for astrophysical simulations is presented.

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