Resonances in recombination of atomic hydrogen due to long-range H3 molecular states

We present a calculation of the effective rate constant for three-body recombination, taking rearrangement into account. We find a pronounced resonance structure as a function of magnetic field due to long-range rovibrational states of H3 in an almost equilateral configuration. This structure is superposed on a rather flat background with a slow decrease below 10 T. The results are compared with experiment