He accumulation effect in solid and liquid D-T mixture

This article reports the accumulation effect of the He-3 originating from t ritium beta decay; He-3 created in solid remains in it, while one in liquid diffuses and goes out to the vapor gas. We observed this effect through th e neutron detection from muon catalyzed fusion phenomenon (mu CF), and gave it qualitative understanding, by which the muon transfer rate from (d mu) and (t mu) to helium was derived.