Large-space cluster model calculations for the He3(He3,2p)He4 and   H3(H3,2n)He4 reactions
  The He3(He3,2p)He4 and H3(H3,2n)He4 reactions are studied in a microscopic cluster model. We search for resonances in the He3+He3 and He4+p+p channels using methods that treat the two- and three-body resonance asymptotics correctly. Our results show that the existence of a low-energy resonance or virtual state, which could influence the Be-7 and B-8 solar neutrino fluxes, is rather unlikely. Our calculated He3(He3,2p)He4 and H3(H3,2n)He4 cross sections are in a good general agreement with the experimental data. 
Attila Csoto (Eotvos University, Budapest) and Karlheinz Langanke   (Aarhus University)