Study of the Mo-Ba partition in Cf-252 spontaneous fission

Measurements of fission fragment yields and neutron multiplicities have bee n carried out for the Mo-Ba fragment pairs in the spontaneous fission of Cf -252; using the gamma-ray spectroscopy technique to analyze gamma-gamma-gam ma coincidence data. Prompt gamma-ray multiplicities were also measured as a function of the number of neutrons emitted in the fission process leading to the Mo-Ba partition. We do not observe the enhancement in the yields of events with high neutron emission multiplicity (v(n)greater than or equal to 7) that has been associated to a second fission mode leading to the prod uction of hyperdeformed Ba fragments, as reported in some earlier studies. The average gamma-ray multiplicity is found to be rather weakly dependent o n the number of neutrons emitted in the fission process.