Gamma rays and, for the first time, conversion muons of pt fusion have been measured from liquid mixtures of protium, deuterium, and tritium. The rate Aio for spin flip from the triplet to the singlet state of t/i(ls) was found to be Aio = (1.06 ± 0.13) x 10^/xs~^, the rate for muon-catalyzed pt fusion from the (/ = 1) nuclear-spin state to be X{,t{I = I) = 0.067 ± 0.002 Ig;^^! Ms"\ and the molecular formation rate to be A^ = (7.5 d= 0.3 to.s) Ms"-^ (all rates normalized to liquid hydrogen density).

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