Measurements of fission fragment yields and neutron multiplicities have been 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-gamma 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 production of hyperdeformed Ba fragments, as reported in some earlier studies. The average gamma-ray multiplicity is found to be rather weakly dependent on the number of neutrons emitted in the fission process.
Study of the Mo-Ba partition in 252Cf spontaneous fission
VIESTI, GIUSEPPE;LUNARDON, MARCELLO;
2000
Abstract
Measurements of fission fragment yields and neutron multiplicities have been 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-gamma 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 production of hyperdeformed Ba fragments, as reported in some earlier studies. The average gamma-ray multiplicity is found to be rather weakly dependent on the number of neutrons emitted in the fission process.
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