No neutrons required. Remember that He4 most probably is a product from alpha emission.
The probability of hydrogen fusion is very low. On Wed, Jun 19, 2013 at 4:03 PM, <[email protected]> wrote: > 1998 SRI International Hydrogen LENR Experiment Produces Helium-4 > > EXCERPT: > New Energy Times has discovered that a 1998 light-hydrogen gas LENR > experiment performed at SRI International, in Menlo Park, Calif., > unexpectedly produced a significant amount of helium-4. > ... > At the Dallas, Texas, American Chemical Society national meeting on April > 12, 1989, reporters asked “cold fusion” co-discoverer Stanley Pons about > the “obvious control experiment of running with all conditions identical > but with normal water rather than heavy water.” > ... > Pons reluctantly admitted to reporters that the experimental data he and > Fleischmann had accumulated suggested that they had observed excess heat > in light-water (H2O) electrolytic cells as well as in heavy-water (D2O) > cells. > > >

