2010/4/1 Jed Rothwell <[email protected]>: > Michel Jullian wrote: ... >> What we need is an indisputable proof of He production. All right it leaks >> through glass, so how about a closed cell kept under positive pressure? >> Surely, after a few days it would accumulate a sizable amount of He, which >> couldn't possibly come from the atmosphere because of the positive pressure. > > McKubre et al. did this with the Case experiment. Passel et al. published a > short paper that described a possible error in this, but I they were wrong.
Thanks Jed, the refs would be nice. Re Stephen's argument that it can be argued that He can leak in in spite of positive pressure, we could easily bathe the cell in a He free environment, or simply make the cell He impermeable (metal or metal coated cell casing). Re Abd's argument that no "sizable" amount of He can be produced, it seems to me that since a _measurable_ concentration has been found in spite of high dilution in the gaseous output of open cells, then a fortiori we should be able to accumulate a _sizable_ concentration in the head space of a closed cell. Plus, it is easier to measure excess heat accurately in a closed cell, for those who insist that heat should be measured too. Michel
