Identification of Excited 10BE Clusters Born in Ternary Fission of 252CF

Ternary fission of ²⁵²Cf was studied at Gammasphere with using eight ΔE×E particle telescopes. The 3368 keV gamma transition from the first excited state in ¹⁰Be was undoubtedly found. The ratio of the population probabilities for these two levels was estimated as 0.160±0.025. The nuclear temperature of the neck region near the scission point was estimated as 1.0±0.2 MeV. No evidence was found for 3368 keV γ rays emitted from a triple molecular state.