-----Original Message----- From: [email protected] In reply to Axil Axil's message
>Beside iron, I cannot think of another element that can be detected using a >gamma spectrum beside thorium. RvS: He wouldn't allow use of the spectrometer while the device *was in operation*. IMO that implies that either x-rays or gamma rays are generated during operation, and their spectra would reveal the chemical composition of the content. But Rossi did allow what Levi said was a positron detector during operation. There is even a video of its screen - showing counts, which were about background level. Apparently they expected to see positron annihilation. Many medical isotopes could have been detected with the machine off, including cobalt-60 - a strong gamma emitter which decays to nickel. Also potassium-40 is a prime candidate, due to Mills. The beta decay would show detectable bremsstrahlung. Jones
