I wrote: In Rossi's own 2010 patent, he states that the lead (and boron) shield is > there to protect from harmful radiation: "In particular, the inventive > apparatus is coated by boron layers and lead plates both for restraining > noxious radiations and transforming them into energy, without generating > residue radiations and radioactive materials." >
Sorry, that's patent application, not patent. This is not a direct admission of seeing gammas. But it's a most relevant detail to keep in one's mind in assessing other statements from Rossi concerning ionizing radiation. Eric