I don't think this was mentioned yet... Apparently they have seen energetic particles of 100-300keV. The following excerpt from one of the Ny Teknik Q&A sessions with Rossi...
"Peter Ekström: In the fusion of a proton with Ni-58 a substantial activity of Cu-59 is formed. Cu-59 decays with a half-life of 82 seconds by beta+ decay. In the Focardi and Rossi article it is stated that: "No radioactivity has been found also in the Nickel residual from the process". Considering the very high activity of Cu-59 that is produced, it is surprising that no activity is detected. Even ten half-lives after the end of a run the activity should be of the order of 1013 Bq, which is not only easily measurable (with a detector far away from the source) but also deadly for everybody present in the room! (Could you explain?) Rossi: No radioactivity has been found in the residual metals, it is true, but the day after the stop of the operation. In any case you are right, if 59-Cu is formed from 58-Ni we should have the couples of 511 keV at 180° and we never found them, while we found keV in the range of 100-300 keV. I think no 59Cu is produced, I suppose only stable Cu is produced from the transmutation of the isotopes 62Ni and 64Ni. I desume this from what we find after the operations. Your observation is correct." -Mark
