True, but if they were getting anything like that level of activity, their plastic detector would have been swamped. If one in a hundred million neutrons produc

True, but if they were getting anything like that level of activity, their plastic detector would have been swamped. If one in a hundred million neutrons produced by this process headed through the plastic, they could have reported thousands of "triple tracks", rather than a "small number". I realize that the experiment is a small step and not intended to generate energy by itself, but it strikes me as an awfully high magnitude to be counting individually with a microscope.