Binary and Ternary Fission Yields of ²⁵²Cf

Abstract

The spontaneous fission of ²⁵² Cf has been studied via γ — γ — γ coincidence and γ —γ-light charged particle coincidence with Gammasphere. The yields of correlated Mo — Ba pairs in binary fission with 0–10 neutron emission have been remeasured with an uncompressed cube. The previous hot fission mode with 8–10 neutron emission seen in the Mo—Ba split is found to be smaller than earlier results but still present. New 0 n binary SF yields are reported. By gating on the light charged particles detected in ΔE — E detectors and γ — γ coincidences with Gammasphere, the relative yields of correlated pairs in alpha ternary fission with zero to 6n emission are observed for the first time. The peak occurs around the α 2n channel. A number of correlated pairs are identified in ternary fission with ¹⁰ Be as the LCP. We observed only cold, 0 n ¹⁰ Be and little, if any, hot, xn ¹⁰ Be channel.