New Measurement of Zr-Ce Yield Matrix for 252Cf
The Zr-Ce fission fragment yield matrix has been determined from the spontaneous fission of 252Cf using Gamasphere data. About 1.9*1011 quadruple-coincidence events of fission gamma rays were used to reconstruct the yield matrix of coincident pair of zirconium [Z=40] and cerium [Z=58] fission fragments from 0 to 8 neutron multiplicities. The data used in the current analysis have better statistics than that used in the previous study on the spontaneous fission of 252Cf. Also, the previous work only had triple gamma coincidence events. Thus, the present study was expected to yield more accurate results. However, the results from this study were similar to those from the previous study, with smaller error limits.