jamesr wrote: The maths rule it out.    It will always take way more energy to generate muons than any benefit they give.
	
	Thanks for your reply …
	That sounds like there is an upper limit on the number of p-b11 nuclei that a muon can catalyze at a given (or any) temperature. Where can I find the formula? Since the boron nuclei are heavier I would expect that the number of nuclei that fuse would be a lot higher than the 300+ seen for d-t.