New determination of the Ba - Mo yield matrix for 252 Cf

نویسندگان

  • J. O. Rasmussen
  • A. V. Daniel
  • J. K. Hwang
  • A. V. Ramayya
  • J. H. Hamilton
چکیده

Using triple-coincidence events of prompt fission gamma rays from 1995 Gammasphere data on spontaneous fission of Cf, we made a careful analysis of the yield matrix of coincident pairs of barium (Z556) and molybdenum (Z542) fission fragments. Branching from gamma bands (K52) and octupole bands (K50) are presented for even-even partners, where observable. From this reanalysis the previously proposed ‘‘extrahot-fission mode’’ ~up to ten neutrons evaporated! as determined by twofold coincidences of 1993 Gammasphere data is much weaker, but not excluded. This finding is in agreement with a recently published similar study from the Legnaro gamma-detector array.

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تاریخ انتشار 2000