Some unrelated independent third party research might serve to validate Rossi's reaction theory positing high energy electron production coming from a Bosenova of what Rossi calls electron clusters embedded in his plasma.
We know these clusters to actually be polariton condensates. In the video below, Sveinn Ólafsson is shining a laser spot onto some Ultra dense hydrogen (UDH) and seeing some interference patterns that he cannot account for. https://youtu.be/sZHVG5NYLyQ?t=372 In the article about polaritons lasers, the same interference patterns are seen in the article as follows: https://phys.org/news/2019-05-scientists-polariton-nano-laser-room-temperature.html https://scx1.b-cdn.net/csz/news/800a/2019/4-scientistsat.jpg also from the underlying source document https://www.science.org/doi/10.1126/sciadv.aau9338 https://www.science.org/cms/10.1126/sciadv.aau9338/asset/633596a6-17bf-4994-8948-c14a073e0277/assets/graphic/aau9338-f3.jpeg What Sveinn is doing is producing what we call an EVO (aka polariton condensate) from an UDH seed when Sveinn excites the UDH with the laser spot. Sveinn also reports the appearance of high energy particles coming from the area where the interference pattern appears corresponding with the laser spot. We see at 8:31 in the video, that high energy particles are produced that we know from Rossi's paper are electrons. These electrons have an energy of 1.5 MeV. This same energy was the maximum energy that we saw in the radiation burst that came from the MFMP LENR experiment upon activation of heat production. That gamma ray burst was called the "signal" and took the form of breaking radiation whose top energy was 1.5 MeV from a Bosenova of an electron cluster. In addition, Sveinn also sees material degradation at the spot of high energy particle production on the substrate.