Recombination
What John Rohner said in an interview the other day complicates the nuclear reactions going on in LENR. John said that the original Papp engine produced boron as an ash product and as a consequence, demonstrated relatively poor reaction efficiency. Because of his efforts to optimize the reaction in his engine, he gets far better efficiency than Papp did: more than two times better. John said that like Papp, the Helium in his noble gas mix was fusing in his engine, but an inverse fission process is clearing the boron ash back to helium so that only energy is produced. If this complicated nuclear cycle is in fact occurring, it will be very hard to characterize the nuclear processes at work in these LENR reactors. Cheers: Axil