Observation of ^{10}Be Emission in the Cold Ternary Spontaneous Fission of ^{252}Cf

Production and properties of transuranium elements

“…Recent studies of SF of 252 Cf with large γ -ray detector arrays, Gammasphere [46], revealed a new fission mode, cold fission with no neutron emission in the pair fragments of Zr-Ce and Mo-Ba [75]. Cold ternary SF, as 252 Cf → 146 Ba + 96 Sr + 10 Be, has also been identified by measuring the various γ -transitions of these nuclei in coincidence [76]. The use of the high resolution triple γ -coincidence technique can provide important information on very rare events in fission.…”

Ternary fission of 260No in collinear configuration

“…The fission process is either cold fission mode producing unexcited daughters or hot one with emitted neutrons from daughters having large excitation energy. The cold ternary fission channels are dominant with respect to the hot ones [3,4].…”

An Evaporation-Based Model of Thermal Neutron Induced Ternary Fission of Plutonium

“…For example, the dependence of ternary fission on the charge of the light particle can be used to conclude that ternary fission is "inconsistent with a statistical emission mechanism in which emission barriers follow a standard Z dependence" [15]. Recently, γ-γ-γ coincidences and γ-γ-light charged particle coincidences have provided evidence for two different mechanisms for ternary fission, one hot and the other cold [16][17][18]. The 10 Be accompanied fission of 252 Cf appears to be dominated by the cold process [18].…”